OKUMA

12” LCD OKUMA Replacement Monitor – TOI12LB1-A248

The TOI12LB1-A248 is a 12-inch industrial LCD monitor (“12” LCD CNC Monitor”) designed as a direct replacement for the CRT monitors fitted to OKUMA operator panels and control systems, as well as other CNC machine tools. The unit accepts multiple analogue video formats (RGB, CGA, EGA, VGA, RGBS) to ensure compatibility with legacy CNC controllers from various generations. The CCFL- or LED-backlit LCD panel delivers a sharper, brighter image than the original cathode-ray tube, with a significantly longer service life and no geometric drift. The main part number is TOI12LB1A248; the commercial alternative code is TOI12LB1-A248.

The monitor is the visual interface through which the operator interacts with the numerical control unit: it displays part programs, machine parameters, diagnostic data, active alarms, and axis status. Replacement becomes critical when the original CRT degrades (blurred image, loss of brightness, distorted geometry, or exhausted tube): without a functioning display the operator cannot verify the part program or acknowledge and reset alarms, rendering the machine completely inoperable.

This is a TOI-series LCD retrofit monitor, specifically configured for plug-and-play replacement of obsolete CRTs on OKUMA controls (and compatible with many other CNC systems). This model is considered legacy / discontinued through standard channels; availability is limited to remaining stock, used units, or reconditioned assemblies.

Main Technical Specifications

AC Spindle Drive – OKUMA VACII D-8A

The VACII D-8A is an AC spindle drive amplifier (“AC Spindle Drive”) manufactured by OKUMA, belonging to the VAC II series of AC spindle drive units. The module is designed to operate within OKUMA CNC systems fitted with the proprietary OSP (OKUMA Servo Pack) controller, typically installed in OKUMA machining centres and CNC lathes produced during the 1980s–1990s. The designation “D-8A” identifies the power/current variant within the VAC II family; it governs AC spindle motor torque and speed, interfacing directly with the OSP controller module.

The spindle drive is the power electronics module that converts three-phase AC mains voltage into variable voltage and frequency for the spindle motor, closing the speed and torque loop based on CNC reference commands. Without it the spindle cannot be speed-controlled or smoothly accelerated and decelerated: any failure causes an immediate machine stop and makes further machining impossible.

OKUMA Corporation is one of Japan’s leading CNC machine tool manufacturers, founded in 1898 and headquartered in Oguchi, Aichi, Japan. It is one of the few manufacturers worldwide to design and integrate the machine, motor, drive and CNC control in-house through the proprietary OSP system. Products in the VAC II series are legacy / discontinued: available exclusively as used spare parts, surplus stock, or through specialist repair services.

Main Technical Specifications

CNC Operator Panel – OKUMA OSP 5000SG-IT

The OSP 5000SG-IT is a CNC operator panel (“CNC Operator Panel”) manufactured by OKUMA Corporation, a component of the OSP 5000SG CNC control unit belonging to the OSP (Open System Platform) series. The panel is the human-machine interface (HMI) of the CNC system: it incorporates the MDI (Manual Data Input) keyboard with an Italian (“IT”) layout, function keys for operating mode selection (AUTO, MDI, HANDLE, JOG), rapid traverse keys, and emergency stop. It connects to the OSP 5000SG main rack via a dedicated cable and serves as the primary interface point for machine programming and control.

The operator panel is the command terminal through which the operator directly interacts with the numeric control: entering and editing part programs, selecting operating modes, performing work origin and tool offset corrections, and monitoring machine status in real time. In the event of failure, the machine is inoperable in any mode — neither manual, MDI, nor automatic — making this component absolutely critical for production continuity.

OKUMA Corporation is a Japanese CNC machine tool manufacturer founded in 1898, the only manufacturer in the world to design machine, motor, and numeric control (OSP series) entirely in-house. The OSP 5000 series, developed in the 1990s, is now legacy / discontinued: official OKUMA support has ended and availability is limited to used components, surplus stock, and specialist repair services.

Main Technical Specifications

CNC Operator Panel – OKUMA OSP 5000 LIT

The OSP 5000 LIT is the operator panel (“Operator Panel”) of the OKUMA OSP5000L CNC control system, manufactured by OKUMA Corporation. It is the main human-machine interface (HMI) of the OSP5000L numerical control, documented on OKUMA CNC machining centres and lathes from the 1990s–2000s era. The panel integrates a display (CRT in early versions, LCD in later revisions), an MDI keyboard for data and programme entry, operating mode selectors, feed rate and spindle speed override potentiometers, manual jog controls and an emergency stop pushbutton. The suffix LIT identifies the Italian-language localised variant. The unit is an integral part of the machine’s electrical cabinet and communicates with the CNC CPU via a dedicated OKUMA panel bus.

The operator panel is the sole access point through which the operator sets up, starts and monitors machining: without it, programmes cannot be entered or edited, tool offsets cannot be corrected, operating modes cannot be selected and alarm messages cannot be read. A panel failure brings the machine to a complete standstill regardless of the condition of the axes, spindle and power electronics, making any production impossible until it is restored.

OKUMA Corporation is a Japanese machine tool builder founded in 1898 in Nagoya, still active and listed on the Tokyo Stock Exchange (TYO: 6103). Unlike most competitors, OKUMA develops both its machine tools and its proprietary OSP (Open System Platform) numerical control in-house, ensuring full hardware/software integration. Products in the OSP5000L series are legacy / discontinued: the platform has been superseded by the OSP-P and OSP-E lines; original panels are available only as used, surplus or through specialist repair.

Main Technical Specifications

Servo Drive Unit – OKUMA MIV22-3-V5

The MIV22-3-V5 is an intelligent vector servo drive (“Motor Intelligent Vector Drive”) manufactured by OKUMA, belonging to the MIV (Motor Intelligent Vector) series. It is designed for use in OKUMA CNC machining centres and lathes equipped with the proprietary OSP (Open System Platform) control system. It handles vector speed and torque regulation of the axis servo motor, receiving digital set-point references from the CNC and driving the power stage accordingly. The designation “MIV22” indicates the rated current class (~22 A); the suffix “3” identifies the variant or number of controlled axes, while “V5” denotes the firmware/hardware revision.

The servo drive is the electronic heart of the axis motion system: it converts the digital references from the OSP control into current supplied to the servo motor, ensuring precise positioning and dimensional repeatability in the machined part. If it fails, the controlled axis loses all ability to move in a controlled manner, rendering the machine unusable and halting production.

OKUMA Corporation, founded in 1898 in Nagoya, Japan, is one of the world’s leading CNC machine tool builders. It is one of the few manufacturers to develop in-house the machine, the numerical control (OSP – Open System Platform), and the motors and drives, ensuring full system integration. Components of the MIV series in older versions are legacy / discontinued and primarily available as refurbished used parts or through specialist repair services.

Main Technical Specifications

Axis CNC Servo Drive – OKUMA MIV45-3-V5

The MIV45-3-V5 is a digital CNC axis servo drive (“Axis Servo Drive”) manufactured by OKUMA Corporation, a component of the axis control architecture in OKUMA CNC machining centres and lathes equipped with the proprietary OSP (Open System Platform) numerical control. The unit receives position and speed references from the NC board via OKUMA’s proprietary serial bus and digitally manages the current, speed, and torque loops of the AC servo motors driving the machine axes. The suffix V5 identifies the hardware/firmware revision within the MIV45 series; the number 3 denotes the axis configuration variant of the unit.

The servo drive is the component that converts digital commands from the CNC into phase currents for the machine axis AC motors, closing the position, speed, and torque control loops in real time. A failure immediately triggers an axis alarm and halts machining; an uncontained following error can cause collisions or dimensional rejects, making this drive critical for both process safety and part quality.

OKUMA Corporation is one of the world’s leading CNC machine tool manufacturers, founded in 1898 in Oguchi, Aichi, Japan. It is the only builder that designs and manufactures machines, motors, drives, and the numerical control system (OSP) entirely in-house, ensuring full vertical integration. Components in the MIV series belong to OSP control generations that are now in an advanced stage of their life cycle: availability as new spare parts is very limited, and specialist repair or authorised OKUMA distributors are strongly recommended.

Main Technical Specifications

CNC Power Supply – OKUMA MPS 20

The MPS 20 is a panel-mount CNC control power supply (“Main Power Supply”) manufactured by OKUMA, used as the power supply unit in OSP (Open System Platform) numerical control systems fitted to OKUMA machine tools. The module converts mains voltage into regulated DC voltages (+5 V, ±15 V, +24 V DC typical) required by the CPU boards, I/O modules and drive electronics of the control. Documented on machining centres and CNC lathes of the LB, LR, MA, MB series and OSP3000 / OSP5000 control systems.

The MPS 20 power supply is the backbone of the CNC control system’s energy supply: without stable, filtered voltages all logic boards, servo modules and the operator panel cease to function immediately. A power supply failure results in complete machine downtime and, in the most serious cases, loss of position data with the risk of mechanical interference on restart.

OKUMA is a Japanese manufacturer founded in 1898 and one of the world’s leading producers of CNC machine tools and proprietary OSP control systems. The exclusive integration between machine and control ensures optimal performance but makes spare parts dependent on the OKUMA supply channel. Components in the MPS series for first- and second-generation OSP systems are legacy / discontinued: available only as used, surplus or through specialist repair.

Main Technical Specifications

CNC Power Supply – OKUMA MPR5

The MPR5 is a switching power supply unit for CNC control systems (“CNC Power Supply Unit”) manufactured by OKUMA, designed to power the electronic circuits of CNC control systems in the OSP (Open System Platform) series. The module delivers multiple regulated voltages required by control boards, I/O interfaces and logic circuits of the CNC unit. The commercial reference is MPR5; in some systems the module is integrated into the control rack or mounted on a dedicated panel. Compatible with OKUMA lathes, machining centres and grinding machines from the 1980s–2000s.

The power supply is the critical component that converts and distributes electrical energy to all circuits of the CNC control: an unstable voltage or an out-of-specification output causes malfunctions, safety shutdowns or irreversible damage to logic boards. Its failure renders the machine completely inoperable, halting production until the module is replaced or repaired.

OKUMA Corporation, founded in 1898 in Oguchi (Aichi, Japan), is one of the world’s leading CNC machine tool manufacturers. Unlike many competitors, OKUMA develops its entire control chain in-house — CNC controls, motors, drives and power supplies — ensuring optimal integration and advanced diagnostics. Components in the MPR series belong to an earlier generation of CNC systems: these are legacy / discontinued products, available exclusively as used, surplus or through specialist repair services.

Main Technical Specifications

Servo Axis Drive Module – OKUMA MIV30-3-V5

The MIV30-3-V5 (catalogue code MIV303V5) is a servo axis drive module (“Servo Axis Drive Module”) manufactured by OKUMA, designed for OKUMA CNC machining centres and lathes equipped with the OSP control system (Open System Platform). The module closes the speed and current regulation loops for the axis servo motors, receiving references from the CNC control unit via the proprietary internal communication bus and generating the three-phase PWM-modulated output to the servo motor. The MIV designation identifies servo drive modules within the OKUMA drive family; the “30” suffix typically indicates the peak current rating (approximately 30 A), while “V5” identifies the hardware and firmware variant/revision.

The servo axis drive module is the power electronics component that converts digital commands from the CNC into precisely modulated electrical power to drive the axis servo motor. It ensures accurate position, speed and torque control on each controlled axis. In the event of failure, the axis can no longer be controlled: the machine triggers an immediate alarm with motion lockout and no machining operation is possible until the module is replaced or repaired.

OKUMA is one of Japan’s leading CNC machine tool manufacturers, founded in 1898 in Nagoya, Japan. Unlike most competitors, OKUMA designs and manufactures both the machine tools and the CNC control systems (OSP series) in-house, ensuring full integration between mechanics and electronics. MIV-series modules intended for earlier-generation OSP controls are legacy / discontinued: availability is limited to used parts, NOS/surplus stock, or specialist repair services.

Main Technical Specifications

Servo Drive Module – OKUMA MIV08-1-B5

The MIV08-1-B5 is a servo drive module (“Servo Drive Module”) manufactured by OKUMA Corporation, a component of the axis control system for OKUMA CNC machine tools equipped with the proprietary OSP (Open System Platform) numerical control. The module manages speed, torque, and position regulation for a servo axis, interfacing with the CNC via the OKUMA proprietary serial bus. The alternate part number MIV081B5 identifies the same component in the OKUMA spare parts catalogue. The component may exist in multiple hardware revisions.

The servo drive module is the core of the axis control loop for the machine’s linear or rotary axes: it converts digital commands from the CNC into motor supply current, closing the position, speed, and torque loops in real time. A failure of this module causes immediate locking of the affected axis and halts the machining cycle, rendering the machine inoperable until the component is replaced or repaired, with consequent production downtime.

OKUMA Corporation is one of Japan’s leading CNC machine tool builders, founded in 1898 in Nagoya. It is distinguished by its vertically integrated design of machines, CNC controls (OSP series), and drives — all developed and manufactured in-house. Components in the MIV series are legacy / discontinued: available only as used/surplus or through specialist repair services.

Main Technical Specifications

Servo Drive Module – OKUMA MIV0101-1-B1

The MIV0101-1-B1 is a servo drive module (“Servo Drive Unit”) manufactured by OKUMA, a component of the axis control system for OKUMA CNC machine tools equipped with the OSP (Open System Platform) controller. The module manages speed, torque, and position regulation of a brushless servo motor, receiving commands from the CNC via a proprietary bus and returning position/speed feedback via a dedicated encoder. The part number MIV0101-1-B1 identifies hardware revision B1 of the MIV0101 family; other hardware revision variants may exist.

The servo drive module is the power and control element that converts CNC digital references into phase currents for the axis motor: it closes the position, speed, and current loops, ensuring the positioning accuracy typical of OKUMA machine tools. A module failure triggers the corresponding axis alarm, disables axis movement, and immediately stops the machine, preventing production from resuming until the unit is replaced or repaired.

OKUMA Corporation is a Japanese manufacturer founded in 1898 in Nagoya, specialising in CNC machine tools (lathes, machining centres, grinding machines) and the in-house OSP (Open System Platform) control systems developed entirely internally. It is one of the few manufacturers in the world that designs the machine tool, the CNC controller, and the drives entirely in-house. Products of the MIV series are legacy / discontinued: available exclusively as used, surplus, or through specialist repair services.

Main Technical Specifications

AC Servo Drive – OKUMA MIV08A-1-B5

The MIV08A-1-B5 is a digital AC servo amplifier (“AC Servo Drive”) manufactured by OKUMA, belonging to the MIV series of axis servo amplifiers. The unit is designed to operate within OKUMA CNC systems equipped with OSP (Open System Platform) controllers, covering the OSP5000, OSP7000, and OSP-U generations. It is documented on OKUMA machining centres and CNC lathes of the LB, MB, and MC series. The designation “08A” indicates a nominal output current of approximately 8 A; the suffix “B5” identifies the hardware variant and revision of the module.

The servo drive closes the position, speed, and torque control loops of a linear or rotary machine axis: it receives digital commands from the OKUMA CNC via the proprietary serial bus and generates the three-phase current required to power the servo motor, ensuring fast and repeatable positioning. A drive failure immediately stops the affected axis with a CNC alarm, rendering the machine inoperable; in severe cases it may result in position loss or an axis crash.

OKUMA Corporation, founded in 1898 in Oguchi, Japan, is one of the world’s leading manufacturers of CNC machine tools and control systems. OKUMA develops its machine tools, OSP controllers, and servo components entirely in-house, ensuring full hardware and software integration. Products in the MIV series are legacy components of the OSP system and are legacy / discontinued: available only as used stock, surplus, or through specialist repair services.

Main Technical Specifications

Drive Inverter Module – OKUMA MIV08-3-V1

The MIV08-3-V1 is an electronic drive inverter module (“Drive Inverter Module”) manufactured by OKUMA, documented as a component of the servo and spindle drive systems for OKUMA CNC machine tools equipped with OSP (Open System Platform) controllers. The module performs DC-to-AC power conversion and current/speed regulation for servo axes or spindle motors, operating within OKUMA’s integrated proprietary drive architecture. The MIV designation identifies inverter modules within the OKUMA drive family; the suffix 08 denotes the current/power size variant, 3 the sub-variant, and V1 the hardware revision.

The MIV08-3-V1 inverter module is the core power electronics component that converts DC bus voltage into variable-frequency, variable-voltage AC power for the connected servo or spindle motor, closing the current and speed loops under command from the OSP controller. In the event of failure, the axis or spindle managed by this module becomes completely inoperative and the machine cannot carry out any machining operations; the proprietary and integrated nature of the OKUMA system makes this component critical and non-interchangeable with generic equivalents.

OKUMA Corporation, founded in Nagoya (Japan) in 1898, is one of the world’s leading manufacturers of CNC machine tools and integrated control systems. The company develops its own controllers (OSP), drives, and motors as a closed proprietary system, making spare parts in this series exclusive and non-interchangeable with other brands. Modules in the earlier-generation MIV family are legacy / discontinued: available only as used, surplus, or through specialist repair services.

Main Technical Specifications

AC Servo Drive – OKUMA MIV0404A-1-B5

The MIV0404A-1-B5 is an AC vector servo drive (“AC Servo Drive”) manufactured by OKUMA Corporation, belonging to the MIV series (Motor Interface Vector) used in OKUMA CNC systems with the proprietary OSP control (Open System Platform). The unit converts digital CNC commands into current and voltage signals for the AC brushless motor of the controlled axis, managing the current and speed loops in vector mode. The part number MIV0404A-1-B5 identifies the MIV series, current class 04 A, hardware revision A-1 and mechanical/firmware variant B5.

The servo drive is the power and regulation module that translates position and speed references generated by the OSP control into variable current for the axis motor: it closes the current and speed loops ensuring precise and repeatable motion during machining. A drive failure renders the controlled axis completely inoperative, immediately stopping the machine; as a proprietary OKUMA electronic component, availability as new is nil and sourcing relies exclusively on the surplus market and specialist repair.

OKUMA Corporation is a Japanese machine tool builder founded in 1898 in Nagoya, a pioneer of vertical integration in the CNC sector through the in-house production of machines, controls and drives. The proprietary OSP control and the associated MIV-series drives are legacy / discontinued: no longer available as new through official OKUMA channels, sourced exclusively as used surplus stock or through specialist repair providers.

Main Technical Specifications

CNC Axis Servo Drive Unit – OKUMA MIV0404-1-B5

The MIV0404-1-B5 is a CNC axis servo drive unit (“Axis Servo Drive / Motor Inverter”) manufactured by OKUMA Corporation, a core motion control component in OKUMA CNC machine tools equipped with the proprietary OSP (Open System Platform) control system. The unit digitally regulates position, speed and torque of the axis servo motor, interfacing directly with the CNC unit via the OKUMA proprietary serial bus. The MIV designation identifies the “Motor Inverter” family within the OKUMA servo architecture; the B5 suffix denotes the hardware revision of the module. The alternative commercial part number is MIV04041B5.

The servo drive is the power and control module that receives position and speed references from the CNC and supplies the axis motor with the current required to follow the programmed path with maximum precision. In the event of failure, the affected axis is completely blocked or uncontrollable: the machine cannot perform any machining operations and is taken out of service until the drive is replaced or repaired, with extended production downtime due to the proprietary nature of the component.

OKUMA Corporation, founded in 1898 in Nagoya, Japan, is one of the world’s leading manufacturers of CNC machine tools (machining centres, lathes, grinders) and proprietary OSP control systems. Unlike many competitors, OKUMA designs and builds both its machine tools and CNC controls entirely in-house, ensuring full integration while binding maintenance to original spare parts. Components in the MIV series belong to superseded OSP generations and are considered legacy / discontinued: available only as used stock, surplus or through specialist repair.

Main Technical Specifications

Servo Drive Module – OKUMA MIV02-1-B1

The MIV02-1-B1 is a servo drive module (“Servo Drive Module”) manufactured by OKUMA, belonging to the MIV series (Motor Inverter Vector) of the integrated drive system for OKUMA machining centres and CNC lathes equipped with the OSP (Open System Platform) control. The module manages the current and speed regulation loops for linear or rotary axis drives, interfacing with the axis control board and the drive power stage on a proprietary rack. The designation MIV02-1-B1 identifies size class 02 (small to medium power rating), hardware revision B, issue 1.

The servo drive module is the core of the machine’s axis motion control: it receives position and speed references from the CNC and closes the regulation loops on the motor, ensuring geometric accuracy on each axis during machining. A failure of this module causes the immediate stop of the corresponding axis and makes it impossible to execute any machining cycle; in severe cases it may result in uncontrolled axis movement with risk of mechanical collision.

OKUMA is one of the world’s leading CNC machine tool builders, founded in Japan in 1898. The company is notable for its complete vertical integration: it designs and manufactures its CNC control (OSP – Open System Platform), drives and motors entirely in-house, ensuring long-term compatibility and support. Components in the MIV series belong to an older control generation and are legacy / discontinued: sourcing is possible only as used, surplus, or through specialist repair.

Main Technical Specifications

Servo Axis Drive Module – OKUMA MIV0204A-1-B5

The MIV0204A-1-B5 is a servo axis amplifier module (“Servo Amplifier Module”) manufactured by OKUMA Corporation, forming part of the axis control chain in OKUMA machining centres and lathes equipped with the OSP (Open System Platform) CNC control. The module handles speed and torque regulation of the servo axis motor, interfacing with the CNC unit via the proprietary OKUMA serial bus and with the drive power stage. The MIV designation identifies the OKUMA servo amplifier family; the suffix A-1-B5 specifies the power and hardware configuration variant. This is not a CPU module or spindle drive, but a dedicated amplifier for a single machine axis.

The servo axis drive is the electronic module that converts position and speed commands from the CNC into drive current for the axis motor: it closes the speed and torque loop, ensuring positioning accuracy and dynamic stiffness during machining. In the event of failure the module triggers an alarm that immediately stops the controlled axis — and often the entire machine — making any cutting operation impossible until the drive is replaced or repaired.

OKUMA Corporation is a Japanese machine tool manufacturer founded in 1898, headquartered in Oguchi, Aichi, Japan. It is one of the few manufacturers worldwide to integrate machine tool, CNC control (OSP series) and servo drives entirely in-house, guaranteeing full system compatibility. Products in the MIV family are legacy / discontinued: no longer available new through the official OKUMA network and sourced exclusively as used, surplus or via specialist repair.

Main Technical Specifications

Servo Drive Module – OKUMA MIV0203-1-B1

The MIV0203-1-B1 is an electronic servo drive module (“Servo Drive Module”) manufactured by OKUMA Corporation, a component of the OSP (Open System Platform) CNC control architecture installed on OKUMA machine tools. The module handles speed and current regulation for a servo axis, receiving references from the OSP internal bus and driving the axis brushless motor. It is also identified by the compact part number MIV02031B1; the “B1” suffix denotes the specific hardware revision.

The servo drive module is the axis controller that converts position and speed commands from the CNC into controlled motor current, closing the feedback loops in real time. Without this module the controlled axis does not respond to commands: the machine generates an axis alarm and cannot perform any machining operation. A fault typically manifests as axis positioning loss, axis drift, abnormal vibration, or immediate production cycle shutdown.

OKUMA Corporation, founded in 1898 in Nagoya, Japan, is one of the world’s leading CNC machine tool builders and the only major manufacturer to develop both the machine and its integrated CNC control system (the OSP – Open System Platform). Modules in the MIV series belong to the OSP-P200 / OSP-P300 control generations and are legacy / discontinued: available exclusively as used, NOS surplus, or through specialist repair services.

Main Technical Specifications

Servo Axis Drive – OKUMA MIV01-1-B5

The MIV01-1-B5 is a single-axis CNC servo drive amplifier (“Single-Axis Servo Drive Amplifier”) manufactured by OKUMA, belonging to the MIV series of servo amplifiers for linear axis control. Designed for integration with the OSP (Open System Platform) CNC control, it manages current and velocity regulation of the axis servo motor, receiving position and velocity references from the control and closing the servo loop on the machine axis. The suffix B5 identifies a specific variant of the unit.

The axis servo drive is the component that converts CNC motion commands into servo motor drive current: it regulates motor torque and velocity in real time, ensuring interpolation and positioning accuracy on the axis. If it fails, the control raises a servo alarm and the affected axis loses all control: the machine stops and machining cannot resume until the drive is replaced or repaired.

OKUMA is one of Japan’s largest CNC machine tool manufacturers, founded in 1898 and headquartered in Oguchi, Aichi Prefecture; it produces lathes, vertical and horizontal machining centres, and OSP control systems with full vertical integration between machine and control. Products in the MIV series are legacy / discontinued: available exclusively as used, surplus, or through specialist repair services.

Main Technical Specifications

Axis Servo Drive Module – OKUMA MIV0103-1-B1

The MIV0103-1-B1 is a digital axis servo drive module (“Axis Servo Drive Module”) manufactured by OKUMA, belonging to the MIV (Motor Inverter) drive family used in OKUMA CNC machining centres and lathes equipped with the OSP (Open System Platform) control. The main catalogue part number is MIV01031B1. The module converts the DC bus voltage from the main power supply unit into three-phase current for the axis brushless servo motor, receiving position and speed references from the CNC via the OKUMA proprietary bus. The module may be available in revision variants indicated by the alphanumeric suffix (e.g. B1).

The axis servo drive is the component that translates the CNC’s digital commands into motor drive current, closing the position, speed and current control loops in real time. A failure renders the corresponding axis uncontrollable: the machine triggers an alarm and machining stops immediately. The dynamic response of the drive is critical for positioning accuracy, surface finish quality, and cycle repeatability.

OKUMA Corporation is a Japanese CNC machine tool manufacturer founded in 1898, headquartered in Oguchi, Aichi, Japan. It is one of the few manufacturers in the world to develop both machine tools and its own proprietary CNC system (OSP — Open System Platform) in-house, ensuring full vertical integration between mechanics, drives and control electronics. Components of the MIV series are legacy / discontinued: available exclusively as used, surplus, or through specialist repair services.

Main Technical Specifications

BDU Servo Drive Board (Base Drive Unit) – OKUMA E4809-032-498-B

The E4809-032-498-B is a BDU servo drive board (“Base Drive Unit”) manufactured by OKUMA, a key component of the integrated servo drive system fitted to OKUMA OSP (Open System Platform) CNC machining centres and lathes. The board manages the base drive stage of the servo amplifier: it generates PWM signals for the power stage (IGBTs) and closes the current regulation loop on the motor. It is documented on machines in the OKUMA MA, MB, MH (machining centre) and LB, LU (lathe) series equipped with OSP-5020L / OSP-7000L controls. The part number belongs to the standard OKUMA nomenclature for the E4809 family, reserved for electronic boards within servo and spindle drive assemblies.

The BDU board is the electronic module that converts the torque and current commands from the CNC controller into gate-drive signals for the servo power stage IGBTs. Without it the controlled axis or spindle loses its drive entirely: the machine triggers an immediate alarm and no controlled movement is possible. A BDU failure typically presents as overcurrent alarms, loss of feedback, or failure to enable the axis.

OKUMA Corporation is a Japanese CNC machine tool builder founded in 1898, specialising in lathes, machining centres, and grinding machines together with its own OSP (Open System Platform) CNC control system. OKUMA is one of the very few manufacturers worldwide that vertically integrates the design and production of the machine, the CNC, and the drives in-house. Products in the E4809 series belong to earlier OSP generations and are legacy / discontinued: available only as used, NOS, or through specialist repair services.

Main Technical Specifications

AC Servo Drive Unit BL-II Series – OKUMA BLII-D50/50A

The BLII-D50/50A is an AC brushless servo drive module (“AC Servo Drive Unit”) belonging to OKUMA’s BL-II (Brushless II) series, designed for closed-loop axis control on the Japanese manufacturer’s CNC machine tools. The designation identifies a 50 A rated unit from the second generation of OKUMA brushless drives, typically installed in vertical and horizontal machining centres and CNC lathes equipped with OSP controllers (OSP5000, OSP5020, OSP700 and related variants), produced from the late 1980s through the early 1990s. The unit manages current and speed regulation of the axis motor, interfacing with the CNC controller via a proprietary OKUMA bus and with the motor via incremental encoder or resolver. Available in multiple size variants; compatibility with the specific machine model and hardware revision must always be verified before replacement.

The servo drive is the power electronics unit that converts position and velocity commands from the CNC into phase current for the brushless axis motor: it closes the current loop in real time and ensures each axis follows the programmed trajectory with precision. In the event of a fault the affected axis becomes uncontrollable and the machine stops immediately with an alarm — production cannot resume until the module has been replaced or repaired, making this component critical for plant operational continuity.

OKUMA Corporation is a Japanese manufacturer of CNC machine tools founded in 1898 in Nagoya; it is one of the few manufacturers in the world to design and produce both machine tools and CNC controllers (OSP – Open System Platform), motors, and servo drives entirely in-house, ensuring full vertical integration that delivers high performance but results in strictly proprietary components. Products in the BL-II series are legacy / discontinued: procurement is possible only through used, surplus, or specialist repair channels.

Main Technical Specifications

BL-II Brushless Servo Drive – OKUMA BLII-D50/30A

The BLII-D50/30A is a brushless servo drive (“BL-II Brushless Servo Drive”) manufactured by OKUMA, belonging to the BL-II (Brushless II) family of the OSP (Open System Platform) axis control system. The unit is rated for a nominal output current of 30 A within the D50 series, designed to control brushless servo motors on the linear and rotary axes of OKUMA CNC machining centres and turning centres. It interfaces with the CNC unit via the OKUMA proprietary bus and receives feedback from the resolver or encoder mounted on the servo motor.

The servo drive closes the current and speed loops on the motor of the controlled axis: it converts the torque and speed reference from the CNC into precise phase current to the brushless motor, ensuring accurate positioning and high dynamic response during machining. If the drive fails, the corresponding axis becomes inoperative and the machine trips into alarm; production cannot resume without replacement or repair of the unit.

OKUMA Corporation is a Japanese machine tool builder founded in 1898 in Nagoya, a world leader in CNC machine tools with the proprietary OSP control system. The BL-II series represents a drive generation developed during the 1990s and 2000s, now legacy / discontinued, superseded by the OSP-P platforms and their next-generation drives.

Main Technical Specifications

Brushless Axis Servo Drive – OKUMA BL-D30A

The BL-D30A is a brushless servo drive (“Brushless Servo Drive”) manufactured by OKUMA, designed as an axis drive component for OKUMA CNC machine tools equipped with the proprietary OSP control (Open System Platform – e.g. OSP5000, OSP7000). The module integrates the current and velocity control loops for OKUMA BL-series brushless servo motors, interfacing with the OSP controller via a dedicated internal bus. The part designation identifies the BL Drive family in the configuration with a typical nominal output current of 30 A. The unit may exist in multiple hardware revisions; compatibility with the target machine’s control system and serial number must be verified before installation.

The brushless servo drive is the heart of every controlled-axis drive system in the machine: it receives position and velocity commands from the CNC, closes the feedback loops on encoder and motor current, and generates the three-phase current required to move the servo motor with the required precision. A failure of the BL-D30A completely disables the corresponding axis, rendering the machine inoperable; latent faults in the drive can cause loss of position reference, uncontrolled movements, or damage to the workpiece in progress.

OKUMA Corporation is one of the world’s leading CNC machine tool manufacturers, founded in Japan in 1898. It is renowned for full vertical integration: it designs and manufactures CNC controls (the OSP system), brushless motors, and drives entirely in-house, ensuring optimised compatibility and performance across all components. OKUMA electronic spare parts are highly proprietary and not interchangeable with other brands; for legacy models such as the BL-D30A, availability is limited to the used/surplus market and specialist repair services.

Main Technical Specifications

CNC Control Board OPUS 7000 – OKUMA 1911-2100

The 1911-2100 is an electronic CNC control board (“CNC Control Board”) manufactured by OKUMA Corporation, a component of the proprietary OPUS 7000 CNC control unit fitted on OKUMA CNC lathes and machining centres of the same generation. The board performs processing, interfacing, or regulation functions within the CNC chassis; the specific function is determined by the board’s slot position on the backplane and by the connector layout on the PCB. The OPUS 7000 system featured a modular architecture with interchangeable boards on an internal bus; some variants include DIN edge connectors and a proprietary OKUMA data bus.

The boards of the OPUS 7000 system form the core of the CNC unit: they ensure machining programme execution, interpolated axis management, servo drive communication, and supervision of all machine I/O. A failure of this board causes a complete control shutdown, making any automatic cycle impossible and requiring immediate intervention by technicians specialised in legacy OKUMA systems.

OKUMA Corporation is a Japanese machine tool manufacturer founded in 1898 in Nagoya, a world leader in the production of lathes, machining centres, and proprietary CNC systems (“Built-In” concept). The OPUS series (OPUS 5000, OPUS 7000) represents the generation of controls developed between the 1980s and early 1990s, now superseded by the OSP family (OKUMA Servo Pack — OSP-P200, OSP-P300). All OPUS 7000 components are legacy / discontinued: available exclusively as used, surplus, or through specialist repair.

Main Technical Specifications

CNC Remote Panel Board CRPB II – OKUMA 1911-164

The 1911-164 is an electronic CNC remote panel interface board CRPB II (“CNC Remote Panel Board II”) manufactured by OKUMA, documented as a component of the OSP (Open System Platform) CNC control series, including OSP-5020, OSP-700, OSP-P200 and related variants fitted to OKUMA machining centres and CNC lathes. The board manages serial communication and the signal bus between the main CNC control unit and the remote operator panels (pendant, machine panel). The suffix II denotes the second design revision, featuring updated communication circuitry over the original CRPB release. The OKUMA spare part number is registered as 1911-164; no external accessories are included as standard.

The CRPB II board is the communication node between the CNC CPU and the operator panel: it transfers panel commands (spindle override, feed override, emergency stop, program selection) to the controller in real time and returns machine status to the panel displays. A failure of this board results in complete loss of operator panel response, inability to start automatic cycles or to intervene manually on the machine, rendering the machining centre fully inoperative until the board is replaced or repaired.

OKUMA Corporation is a Japanese manufacturer founded in 1898, one of the world leaders in CNC machine tools (lathes, machining centres, grinding machines) and the related proprietary OSP (Open System Platform) controls. Unlike many competitors, OKUMA designs both the machine and the CNC in-house, ensuring optimal integration but making electronic spare parts available exclusively through the official network or the specialist secondary market. Products of the OSP-700/5020 family are legacy / discontinued: available only as used, surplus, or through specialist repair.

Main Technical Specifications

Axis Control Board – OKUMA 1911-1114

The 1911-1114 is an axis control board (“Axis Board”) manufactured by OKUMA Corporation, a component of the OSP (Open System Platform) CNC control system fitted to OKUMA machining centres and CNC lathes. The board manages the position and velocity regulation loops for the servo axes (X, Y, Z and additional axes), interfacing between the main CNC CPU and the servo drives. Multiple hardware revisions may exist; compatibility must be verified against the specific OSP generation of the machine.

The axis board is the electronic controller that closes the position and velocity loops on the machine’s servo axes: it receives position references from the CNC CPU and maintains accurate trajectory throughout machining. Failure of this board causes the immediate blocking of one or more axes, rendering the machine completely unusable until it is replaced or repaired.

OKUMA Corporation, founded in 1898 in Nagoya (Japan), is one of the world’s leading manufacturers of CNC machine tools (lathes, machining centres, grinding machines) and OSP-series CNC control systems. The 1911-1114 board belongs to a mature generation of OSP control; the product is legacy / discontinued: available only as used, surplus, or through specialist repair.

Main Technical Specifications

I/O Control Board ICB3H – OKUMA 1006-2122

The 1006-2122 is the ICB3H (“I/O Control Board 3H”), an electronic I/O interface module manufactured by OKUMA Corporation, documented as a component of the OSP CNC (Open System Platform) control system for OKUMA machining centers and CNC lathes. The board manages communication between the central control unit and the machine’s digital I/O signals, including pushbuttons, sensors, actuators, and interlock signals. The suffix “3H” identifies a specific revision or variant within the ICB family.

The ICB3H is the interface between the numerical control unit and the machine’s electrical circuit: it collects and distributes the digital I/O signals that govern the machine’s operating logic (feeds, tool change, safety interlocks). In the event of a failure, the machine loses the ability to read sensors or drive actuators, resulting in an immediate halt of the machining cycle and an inability to operate safely.

OKUMA Corporation is a Japanese CNC machine tool manufacturer founded in 1898 in Nagoya, Japan, known for its proprietary OSP (Open System Platform) control architecture and vertically integrated production of machines, controls, and motors. The ICB3H belongs to a legacy generation of the OSP system and is legacy / discontinued: available only as used, surplus, or through specialist repair.

Main Technical Specifications

I/O Interface Board ICB1H-S – OKUMA 1006-2121

The 1006-2121 is an I/O interface control board (“I/O Interface Control Board”), model ICB1H-S, manufactured by OKUMA for use in the OSP (Open System Platform) CNC control systems. The board manages the exchange of digital and analogue signals between the CNC control unit and machine peripherals (axes, spindle, field I/O), performing logical interfacing and signal level adaptation functions. It is documented as a component of the OKUMA control system across various CNC machine tool families (vertical and horizontal machining centres, CNC lathes, NC grinding machines).

The ICB1H-S board is the interface node that enables the OKUMA CNC to communicate with the power circuits and the machine’s sensors and actuators: without it, the control system cannot read machine states or issue commands to axes or spindle. A failure of this board causes an immediate machine shutdown, triggering I/O communication alarms and preventing any machining cycle from being started.

OKUMA Corporation is a Japanese machine tool and CNC system manufacturer founded in 1898, headquartered in Nagoya. It is one of the very few manufacturers worldwide to produce both machine tools and its own proprietary CNC control system (OSP – Open System Platform). Components from the older CNC series (OSP3000, OSP5000, OSP7000) are legacy / discontinued: available exclusively as used, surplus or through specialist repair.

Main Technical Specifications

Interface Control Board ICB3F – OKUMA 1006-2112

The 1006-2112 is an electronic interface control board (“ICB3F – Interface Control Board”) manufactured by OKUMA, a component of the proprietary OSP (Open System Platform) CNC control system fitted on OKUMA machining centres and lathes. The board manages communication and signal exchange between the CNC CPU unit and the machine’s peripheral modules (axis drives, machine I/O, encoders, integrated PLC). The suffix 3F identifies the hardware revision or variant within the ICB board family of the OSP system. It is not a CPU board or a standalone I/O module, but a dedicated interface stage for managing the internal buses of the control rack.

The ICB3F board is the critical interface node between the CNC central processor and the machine’s mechanical components: it routes position and speed commands to the axis drives and collects real-time feedback signals from encoders and limit switches, ensuring synchronisation of the entire kinematics. A failure typically manifests as serial communication alarms, sudden loss of position on one or more axes, or a complete halt of the automatic cycle; in all cases the machine is inoperable until the board is replaced or repaired.

OKUMA Corporation is a Japanese machine tool manufacturer founded in 1898, headquartered in Oguchi, Aichi, Japan. It is one of the few manufacturers in the world to design and build both the machine tools and its own proprietary CNC control system, OSP (Open System Platform), entirely in-house, ensuring full hardware/software integration. The 1006-2112 belongs to an earlier hardware generation of the OSP platform and is legacy / discontinued: available exclusively as used stock, surplus, or through specialist repair centres.

Main Technical Specifications

Interpolation Control Board ICB1F – OKUMA 1006-2111

The 1006-2111 is an interpolation control board ICB1F (“Interpolation Control Board”) manufactured by OKUMA, a component of the proprietary OSP (Open System Platform) CNC control system fitted to OKUMA machining centres and CNC lathes. The board handles real-time multi-axis interpolation calculations, coordinating simultaneous axis movements to generate the correct tool path. The main spare part number is 1006-2111; the designation 1F identifies the specific hardware revision of the board within the ICB family.

The ICB1F board is the geometric core of the CNC controller: it receives programme blocks from the main processor and calculates in real time the interpolated position of each axis, ensuring accurate trajectories in linear, circular, and spline modes. In the event of failure the CNC cannot execute any machining cycle: the axes lose coordination, the machine halts in alarm, and the production unit becomes completely inoperable until the board is replaced or repaired.

OKUMA Corporation, founded in 1898 in Nagoya, Japan, is one of the world’s leading manufacturers of CNC machine tools and proprietary OSP (Open System Platform) control systems. Unlike many competitors, OKUMA designs and manufactures both the machines and the controls in-house, ensuring complete hardware and software integration. Components from earlier generations of the OSP family are legacy / discontinued: available only as used spare parts, NOS surplus, or through specialist repair centres.

Main Technical Specifications

Interface Control Board ICB1F – OKUMA 1006-2110

The 1006-2110 is an interface control board (“Interface Control Board”, designation ICB1F) manufactured by OKUMA for its proprietary OSP (Open System Platform) CNC control systems. The board manages communication and signal coordination between the main CNC processing unit and the machine’s peripheral subsystems: I/O modules, servo drives, and spindle drive. The designation ICB1F identifies the specific revision and functional configuration within the control rack. The component is documented on OKUMA vertical machining centres and CNC lathes equipped with OSP-5000 / OSP-7000 controls and related series.

The ICB1F board is the interface element that routes and converts digital and analogue signals between the main CNC processor and the machine’s peripheral modules. Without it, the control completely loses the ability to communicate with the axes, the spindle, and the safety logic: no command reaches the drives, the protective interlocks become inoperative, and the machine cannot perform any machining operation, resulting in immediate production downtime.

OKUMA Corporation, founded in 1898 in Nagoya, Japan, is one of the very few CNC machine tool manufacturers to design and produce both the machine and the proprietary numerical control system (OSP – Open System Platform) in-house. This vertical integration ensures optimal performance but makes electronic spare parts non-interchangeable with third-party components; for older models, components are legacy / discontinued and available exclusively as used, surplus, or through specialist repair.

Main Technical Specifications

Interface Control Board ICB3 – OKUMA 1006-2102

The 1006-2102 is an electronic interface control board ICB3 (“Interface Control Board 3”) manufactured by OKUMA, documented as a component of CNC systems equipped with the OSP (Open System Platform) controller, specifically the OSP5000, OSP7000 series and derivatives. The board handles interface and interpolation functions between the main CNC processor and the axis/spindle control modules. It is not a power board, but a real-time processing node within the controller backplane. It may exist in multiple hardware revisions; always verify compatibility with the installed controller software version.

The ICB3 board plays a critical role in the OKUMA OSP controller architecture: it coordinates the data flow between the CPU unit and the servo-control modules for each axis, ensuring the real-time synchronisation and interpolation required to execute precise tool paths. In the event of failure, the CNC is unable to process interpolated movements: the machine triggers an immediate alarm, preventing any machining operation and rendering the controller completely inoperative until the board is replaced or repaired.

OKUMA Corporation is one of Japan’s leading CNC machine tool builders, founded in 1898 in Nagoya. It is one of the few manufacturers in the world to design and produce machines, controllers, motors and drives entirely in-house (the THINC® / OSP platform). Part number 1006-2102 belongs to the OSP5000/7000 generation, which is now legacy / discontinued: spare parts are available exclusively as used, surplus stock, or through specialist repair services.

Main Technical Specifications

I/O Interface Control Board – OKUMA ICB1 1006-2101

The 1006-2101 is an electronic I/O interface and control board (“Interface Control Board 1”), designated ICB1, manufactured by OKUMA. The component belongs to the board family of the OKUMA OSP (Open System Platform) CNC controller and is documented as the interface module between the machine tool’s control subsystems: it manages the flow of digital I/O signals between the main CPU, the operator panel, the axis drives, and the integrated PLC subsystem. Available as the ICB1 variant; the factory part number may also appear in the alternative format listed in the table.

The ICB1 board acts as the central communication hub within the OKUMA control architecture: it routes and conditions digital signals between the CNC rack modules, ensuring real-time consistency of machine states (enables, alarms, interlocks). A failure of this component compromises all inter-module communication: the machine becomes unable to accept commands or monitor axis and auxiliary states, causing an immediate machine stop that cannot be recovered without board replacement or specialist repair.

OKUMA Corporation is a Japanese CNC machine tool manufacturer founded in 1898, headquartered in Nagoya (Aichi Prefecture). A vertically integrated company, OKUMA designs and manufactures both the machine tools and the CNC control systems (OSP – Open System Platform) in-house — a rare distinction in the industry. Products from the older OSP generations are legacy / discontinued: availability is limited to used, surplus and specialist repair.

Main Technical Specifications

Interpolation Control Board ICB1 – OKUMA 1006-2100

The 1006-2100 is an interpolation control board ICB1 (“Interpolation Control Board 1”) by OKUMA Corporation, a component of the OKUMA OSP (Open System Platform) CNC control system, documented on OSP-5000L and OSP-7000L series controllers. The board handles real-time interpolation calculations required for multi-axis motion coordination, interfacing with the main CPU board and the axis control boards within the OSP rack. The part number 1006-2100 uniquely identifies this PCB revision; the designation ICB1 indicates its primary slot position in the control rack.

The ICB1 board is the computational core of CNC interpolation: it processes NC program blocks in real time and calculates velocity ramps and coordinated trajectories for all controlled axes. Without it, the control system cannot execute any interpolated movement, rendering the machine completely unusable for machining. A failure on this board typically manifests as system errors, axis lockout, or inability to start the automatic cycle.

OKUMA Corporation is one of Japan’s leading CNC machine tool manufacturers, founded in 1898 in Nagoya. The company is the world’s only manufacturer that designs both its machines and its own CNC controls (the OSP series) entirely in-house, ensuring fully proprietary hardware/software integration. Components of the OSP-5000/7000 series are legacy / discontinued: spare parts are available only as used, NOS from residual stock, or through specialist repair.

Main Technical Specifications

CNC Control Circuit Board – OKUMA 1006-1102

The 1006-1102 is an electronic CNC control board (“CNC Control Circuit Board”) manufactured by OKUMA, the Japanese builder of machine tools and proprietary CNC systems. The part number falls within the standard electronic spare-parts nomenclature of OKUMA’s OSP (Open System Platform) control series, fitted on machining centres, CNC lathes, and turn-mill centres. The board handles processing, signal acquisition, or internal interface functions within the machine’s electrical cabinet. No specific revisions or included accessories have been documented beyond the board itself.

The electronic boards of the OSP series form the logical core of the OKUMA CNC system: each board is responsible for a specific function — axis processing, I/O, communication, or power — and failure of even a single board can render the machine completely inoperable. Timely replacement is critical to minimising downtime, as lead times for genuine OKUMA spare parts can be lengthy and costs high.

OKUMA Corporation is a Japanese manufacturer founded in 1898 in Nagoya, specialising in CNC machine tools and their own proprietary OSP control systems. Unlike many competitors, OKUMA designs and manufactures both machines and controls in-house, ensuring exclusive hardware/software integration. Electronic components from the older OSP series (OSP 5000, OSP 7000) are legacy / discontinued and available almost exclusively on the used market or through specialist repair services.

Main Technical Specifications

Servo Velocity Control Board SVC II – OKUMA 1006-0601 (2CH)

The 1006-0601 (2CH) is an electronic servo velocity control board (SVC II – “Servo Velocity Control II”) manufactured by OKUMA, documented as a component of the proprietary OSP (Open System Platform) CNC systems installed on OKUMA machining centres and lathes. The board implements the digital velocity controller for the machine’s servo axes, receiving velocity references from the CNC main CPU and closing the feedback loop via encoder or resolver signals mounted on the motors. Available in a dual-channel (2CH) variant, it is capable of managing two independent servo axes simultaneously on the same control backplane.

The SVC II board is the digital controller that closes the velocity loop on the machine’s servo axes: it interprets the velocity command issued by the OSP CNC CPU and generates the current reference to the drive power stage, keeping motor rotation stable and precise even under load variations. In case of failure, the control system loses velocity feedback on the affected axes, rendering the machine inoperable and triggering axis or drive alarms on the CNC panel.

OKUMA Corporation is a Japanese machine tool manufacturer founded in 1898 in Nagoya, among the world leaders in machining centres, lathes and grinding systems. A hallmark of OKUMA is complete vertical integration: machines, CNC controls (OSP – Open System Platform), drives and motors are all designed and manufactured in-house. The SVC II board belongs to the OSP5000/OSP7000 generations of the 1980s–90s and is legacy / discontinued: available only as used spare, surplus stock or through specialist repair.

Main Technical Specifications

SVC II Servo Control Board – OKUMA 1006-0600 (1CH)

The 1006-0600 (1CH) is an electronic servo control board (“Servo Velocity Control Board – SVC II”) manufactured by OKUMA, documented as a component of the OSP (Open System Platform) series CNC machining centres and lathes. The board manages a single axis drive channel (1CH), closing the speed and current regulation loops on the servo motor of the corresponding axis and interfacing with the CNC axis control unit. The “II” suffix denotes the second generation of the SVC family; the single-channel variant is identified by the 1CH suffix in the commercial part number.

The SVC II board is the electronic controller that governs axis servo motor speed and torque: it receives the speed reference from the CNC controller and maintains the programmed position and velocity during interpolated motion. A failure of this module causes loss of control on the affected axis, with immediate program halt, an axis alarm, and inability to perform any machining until the board is replaced or repaired.

OKUMA Corporation is a historic Japanese CNC machine tool manufacturer, founded in 1898 in Oguchi (Aichi Prefecture). It is one of the few manufacturers worldwide to integrate the design and production of the machine, CNC control (OSP series), motors and drives within a single company. Products in the SVC II family belong to dated OSP systems and are legacy / discontinued: available only as used or surplus stock, or through specialist repair services.

Main Technical Specifications

14” Colour CRT Monitor – OKUMA CDT14148B

The CDT14148B is a 14-inch colour CRT monitor (“14-inch Colour CRT Display”) manufactured for OKUMA CNC systems, documented as the operator panel display unit for controls in the OSP (Open System Platform) series. The monitor provides the visual interface between the numeric control and the operator, displaying NC programs, machine parameters, diagnostic screens, and alarm messages. It is a colour cathode-ray tube (CRT) monitor with a 14-inch 4:3 screen, designed for integration into the machine tool operator panel.

The operator panel monitor is the primary interface between the operator and the CNC control: without a working display it is impossible to access machining programs, diagnostic functions, or machine parameters. A monitor failure renders the machine completely inoperable, blocking any interaction with the numeric control, including programming, tool offset verification, and safety alarm monitoring.

OKUMA Corporation is one of the world’s largest and most established Japanese CNC machine tool manufacturers, founded in 1898 in Nagoya; it is among the few builders that develop both the machines and their own proprietary CNC controls (OSP – Open System Platform series) in-house. CRT monitors in the CDT14148B family are legacy / discontinued components: the transition away from CRT technology has made new units unavailable; replacement parts are obtainable only as used, NOS, or through conversion to a compatible LCD monitor.

Main Technical Specifications

10-Inch Monochrome CRT Monitor – OKUMA MDT-1005

The MDT-1005 is a 10-inch monochrome CRT display unit (“Monochrome CRT Display Unit”) manufactured by OKUMA, documented as the operator display for the OKUMA OSP 500 CNC control system. The screen constitutes the human-machine interface (HMI) of the CNC panel, showing machining parameters, programming pages, alarm messages, and machine diagnostics. The tube is a monochrome green-phosphor CRT, typical of 1980s–1990s CNC technology. This component was fitted to OKUMA lathes and machining centres equipped with the OSP 500 control.

The CRT monitor is the display unit that makes the CNC operator interface accessible: without it, the operator cannot read programs, machining parameters, tool offsets, or alarm messages. A faulty monitor renders the machine operationally blind — no cycles can be started, no adjustments made, and no faults diagnosed, resulting in an immediate production stoppage.

OKUMA Corporation is a Japanese manufacturer founded in 1898, a world leader in CNC machine tools (lathes, machining centres, grinders) and proprietary control systems. The OSP 500 control belongs to a legacy generation from the 1980s–1990s; the MDT-1005 monitor is legacy / discontinued: available only as used stock, surplus, or through specialist repair.

Main Technical Specifications

Brushless II Servo Drive – OKUMA BLII-D7575A

The BLII-D7575A is an AC brushless servo drive (“AC Brushless Servo Amplifier”) from the BLII (Brushless II) series manufactured by OKUMA Corporation, designed for CNC machining centers, lathes, and milling machines equipped with OKUMA’s proprietary OSP (Open System Platform) control. The module is a digital drive that manages speed and current control loops for AC brushless servo motors on the working axes. The suffix “D7575A” identifies the size variant and revision within the BLII series; versions with different torque/power ratings may exist.

The servo drive is the power electronic stage that energises and regulates the axis servo motor: it converts digital commands from the CNC into precise phase currents, closing the speed and position control loops. A failure of the BLII-D7575A renders the corresponding axis uncontrollable, causing immediate machine stoppage and the risk of dimensional rejects or collisions during the machining operation in progress.

OKUMA Corporation is a Japanese manufacturer founded in 1898 in Oguchi, Aichi, and one of the world’s largest producers of CNC machine tools. OKUMA is one of the few manufacturers in the world to design machine, CNC control (OSP), and servo/spindle drives entirely in-house, ensuring full system integration. The BLII series belongs to a mature generation of the OKUMA product portfolio; all products in this line are legacy / discontinued and available only as used, surplus, or through specialist repair services.

Main Technical Specifications

10″ LED Monitor – OKUMA OSP50X0-LED

The OSP50X0-LED is a 10-inch LED display panel for CNC operator panels (“10″ LED Operator Panel Monitor”) manufactured by OKUMA, designed as a replacement display unit for OKUMA OSP-5000 series CNC controls (OSP-5000L, OSP-5000M, OSP-5020L, OSP-5020M and variants). The display uses LED-backlit LCD technology as a modern drop-in replacement for aging original CRT monitors or fluorescent-backlit (CCFL) panels. The designation OSP50X0-LED indicates cross-compatibility with the full OSP-50x0 control family, where “X” covers the different machine variants (OKUMA lathes, machining centres, and grinding machines).

The operator panel monitor is the sole visual interface between the operator and the CNC system: it displays the active NC program, axis position readouts, tool offsets, machining parameters and all machine diagnostic alarms. Without a functional display the operator cannot read machine status, modify parameters or interpret alarms, making the CNC lathe or machining centre effectively unusable in production.

OKUMA Corporation is a Japanese machine tool manufacturer founded in 1898 in Nagoya, specialised in CNC lathes, vertical and horizontal machining centres, grinding machines and entirely in-house developed control systems. The OSP (Open Systems Platform) control platform is well known for its high reliability and long operational life. Components for the now-dated OSP-5000 series are available as spare parts in limited quantities and may require significant lead times to source.

Main Technical Specifications

Servo Axis Drive – OKUMA VAC III-D3/6

The VAC III-D3/6 is a servo axis drive amplifier (“Servo Drive Amplifier”) from the VAC III series manufactured by OKUMA, documented as a component of OKUMA CNC machining centers and lathes from the 1980s–1990s equipped with the proprietary OSP numerical control. The module manages the current and velocity regulation loops of the servo axis motor, interfacing with the CNC unit via the signal bus and with the motor through the power bus and encoder feedback connectors. The designation D3/6 indicates the nominal/peak current rating of the drive; this is not a CPU or I/O module, but a dedicated drive stage for linear or rotary axes.

The servo axis drive is the electronic module that converts CNC position and velocity commands into power signals for the axis motor: it closes the current and velocity loops, ensuring positioning accuracy and dynamic stability throughout the machining process. A failure in the drive makes the corresponding axis completely unusable, causing an immediate machine stoppage and preventing any cutting operations until the component is replaced or repaired.

OKUMA is one of Japan’s leading CNC machine tool manufacturers, founded in 1898 in Nagoya. The company is renowned for its vertical integration between machine and proprietary numerical control (OSP – Open System Platform), covering milling machines, lathes, machining centers, and high-precision grinding machines. All components in the VAC III series are legacy / discontinued: available only as used stock, surplus, or through specialist repair services.

Main Technical Specifications

AC Axis Servo Drive – OKUMA VAC III D-22

The VAC III D-22 is an AC axis servo drive (“AC Axis Servo Drive”) manufactured by OKUMA Corporation, belonging to the VAC III series (Vector AC Control, third generation). The unit is documented on OKUMA CNC machining centres and lathes equipped with the OSP (Open System Platform) control, including the MB, MA, MC and LB, LT series. The module performs PWM vector control of the AC axis servo motor, receiving position and speed references from the CNC via proprietary digital bus or fibre optic link, and driving the IGBT power stage to the axis motor. The suffix D-22 identifies the specific size within the series (nominal current or power class).

The axis servo drive is the critical component of the machine motion system: it receives the position profile from the CNC, closes the position and speed loops on the motor, and guarantees the precision, dynamics, and repeatability of each axis during machining. A failure of this module causes complete loss of control of the corresponding axis, immediately stopping the machine and making any machining cycle impossible until the unit is replaced or repaired.

OKUMA Corporation is a Japanese CNC machine tool manufacturer founded in 1898, headquartered in Nagoya. It is one of the few manufacturers in the world to develop in-house both the machines and the CNC controls (OSP – Open System Platform) and drive systems, ensuring full vertical integration and optimised compatibility across all system levels. Products in the VAC III series are legacy / discontinued: available exclusively as used, surplus, or through specialist repair centres.

Main Technical Specifications

Servo Drive Card – OKUMA VAC III D-11

The VAC III D-11 is a servo drive card (“Velocity Amplifier Card”) manufactured by OKUMA, a component of the axis drive system for CNC machine tools equipped with an OSP (Open System Platform) controller. The card belongs to the third generation of the VAC (Velocity Amplifier Card) series; the D-11 designation identifies the specific power and regulation topology variant. It interfaces the CNC controller with the servo motor power stage, processing the analogue velocity reference and the feedback signal from the resolver or encoder.

The VAC III D-11 is the electronic controller that closes the velocity loop on the axis servo motor: it receives the position/velocity reference from the CNC unit and generates the command signal for the power stage, ensuring precise axis positioning during machining. A failure of this component results in the immediate loss of the affected axis, causing machine downtime and complete inability to resume production until the component is repaired or replaced.

OKUMA is a Japanese machine tool manufacturer founded in 1898 in Oguchi (Aichi, Japan). It is one of the few manufacturers worldwide to produce both machine tools and its own CNC control system (OSP – Open System Platform), ensuring full integration between mechanics and control electronics. Products from the VAC III series are legacy / discontinued: available exclusively as used, surplus, or through specialist repair services.

Main Technical Specifications

Servo Axis Drive – OKUMA VACII D-11A

The VACII D-11A is a servo axis drive (“Servo Velocity Amplifier Drive”) manufactured by OKUMA Corporation, belonging to the VACII (Velocity Amplifier Control II) series. It is documented as a component of OKUMA CNC machining centres and lathes equipped with the OSP-5000 and OSP-7000 control systems. The unit manages the velocity loop of the DC axis servo motor, receiving the speed reference from the OKUMA controller and driving the power stage of the drive. The component may exist in construction variants related to the firmware revision of the corresponding OSP control.

The servo axis drive is the electronic controller that closes the velocity loop on the axis motor: it receives the speed reference from the CNC and drives the motor maintaining the required position and speed during machining. A failure in this unit causes immediate loss of control of the corresponding axis, with a CNC alarm and machine stop; as a proprietary OKUMA component, replacement requires an identical unit or specialist repair on OKUMA hardware.

OKUMA Corporation, founded in 1898 in Nagoya, Japan, is one of the world’s leading manufacturers of CNC machine tools and proprietary control systems (the OSP – Okuma Servo Pack series). OKUMA develops both machines and controllers in-house, ensuring tight hardware/software integration. Components of the VACII series are legacy / discontinued: available only as used, surplus, or through specialist repair.

Main Technical Specifications

AC Axis Servo Drive – OKUMA VAC-D-8A

The VAC-D-8A (internal code VACD8A) is an AC axis servo drive manufactured by OKUMA, a Japanese builder of CNC machine tools and proprietary CNC control systems. The unit belongs to the VAC-D series of AC servo drives integrated in the control cabinets of OKUMA machines equipped with the OSP (Open System Platform) CNC controller. The “8A” designation indicates the drive’s rated output current, typically 8 A continuous. The device receives position and speed references from the CNC and drives the corresponding axis servo motor by closing the regulation loops.

The servo drive is the core of an axis drive circuit: it converts the CNC’s digital commands into power signals for the servo motor, simultaneously managing the position, speed, and current control loops. A failure of the VAC-D-8A results in the complete loss of the controlled axis, an immediate machine halt, and a drive alarm; prompt replacement or repair is essential to restore production.

OKUMA is a Japanese company founded in 1898, one of the world’s leading manufacturers of CNC lathes, machining centres, and closed-loop CNC control systems. Unlike many competitors, OKUMA designs and manufactures both the machines and the CNC control (OSP) in-house, ensuring unique vertical integration in the industry. Products in the VAC-D series are legacy / discontinued and available exclusively as used, surplus, or through specialist repair.

Main Technical Specifications

AC Spindle Drive – OKUMA VAC D-22

The VAC D-22 is an AC spindle drive unit manufactured by OKUMA Corporation, designed for vector control of the spindle motor in OKUMA CNC machine tools. The unit belongs to the VAC (Variable AC Drive) series, typically employed on machining centers and CNC lathes equipped with the OSP (Open System Platform) CNC control. It manages torque, speed and current of the spindle motor, receiving references directly from the CNC via the proprietary OKUMA bus. The component is installed either as a standalone rack unit or as an integrated module within the machine’s electrical cabinet.

The spindle drive is the core of the spindle control system: it converts three-phase mains voltage into a variable-frequency, variable-voltage output applied to the spindle motor, maintaining stable rotational speed regardless of load variations during machining. A failure in this module causes immediate and uncontrolled spindle stop, rendering the machine completely inoperable: without the drive, no cutting operation can be performed, resulting in immediate production downtime.

OKUMA Corporation is a Japanese manufacturer founded in 1898 in Nagoya, Japan, and one of the world’s leading producers of CNC machine tools (lathes, machining centers, grinding machines) and related OSP series CNC controls. OKUMA designs both the machines and the drives and motors in-house, ensuring full hardware and software system integration. Products in the VAC series are legacy / discontinued: available only as used, NOS (surplus), or through specialist repair services.

Main Technical Specifications

AC Drive Unit – OKUMA VAC D-11

The VAC D-11 is an AC drive unit (“AC Drive Unit”) manufactured by OKUMA, documented as a component of OKUMA CNC systems equipped with the OSP (OKUMA Servo Pack) control. The drive handles speed and torque regulation of AC motors, covering both linear axes and the spindle, and interfaces directly with the numeric control via a proprietary bus. The designation VAC refers to “Vector AC” control technology, adopted by OKUMA for its machine series from the 1980s–1990s.

The VAC drive unit is the power and regulation node that converts the CNC’s digital references into voltage and current for the machine’s AC motors: without it, the controlled axis or spindle receives no regulated power and the machine halts immediately on alarm. A drive failure typically results in position loss, dimensional rejects, or an abrupt machining cycle stop with collision risk.

OKUMA Corporation, founded in Japan in 1898, is one of the world’s leading CNC machine tool manufacturers (lathes, machining centres, grinders) and develops its own machines, CNC controls (OSP series) and drives in-house, ensuring full hardware/software integration. Products from the legacy VAC series are legacy / discontinued: available only as used, NOS surplus, or through specialist repair.

Main Technical Specifications

CNC Control Power Supply Module – OKUMA OPUS 5000 RLP

The OPUS 5000 RLP is a regulated logic power supply module for CNC control (“Regulated Logic Power Supply Module”) manufactured by OKUMA, a component of the OPUS 5000 CNC control system fitted to OKUMA machining centres and CNC lathes produced during the 1980s and 1990s. The module generates and distributes the stabilised DC voltages required to power the logic boards, processors and interface circuits of the CNC. It is classified as a power unit internal to the control rack, distinct from axis or spindle drives.

The power supply is the energy core of the numerical control unit: it continuously and reliably delivers working voltages to all CNC logic modules. A fault in the power supply causes an immediate shutdown of the entire machine, as without the correct supply voltages no control board can operate; typical symptoms include axis position loss, undiagnosable alarms and inability to start the machining cycle.

OKUMA Corporation is one of Japan’s leading CNC machine tool manufacturers, founded in 1898 in Nagoya. It designs and builds both the machines and its own numerical controls (the OPUS series, succeeded by the OSP – Open System Platform), ensuring full vertical integration. The OPUS 5000 series is legacy / discontinued: spare parts are available only as used stock, NOS surplus, or through specialist repair services.

Main Technical Specifications

CNC Power Supply Unit – OKUMA OPUS 5000 GLP

The OPUS 5000 GLP is an electronic power supply unit for CNC control (“CNC Power Supply Unit”) manufactured by OKUMA, a component of the OPUS 5000 control cabinet. It provides the regulated DC voltages required for the operation of all electronic modules in the control system: logic boards, I/O interfaces, interpolation cards and memory units. The designation GLP identifies the specific configuration of this power supply within the OPUS 5000 family. The OPUS 5000 system was installed on a wide range of OKUMA vertical and horizontal machining centres and CNC lathes from the 1980s and 1990s.

The power supply is the component that converts mains voltage into stabilised and filtered DC voltages, essential for the correct operation of all machine control electronics. A power supply failure causes an immediate and complete shutdown of the CNC control: the machine is rendered unusable until the module is replaced or repaired, resulting in unplanned production downtime and the inability to execute any machining cycle.

OKUMA is a Japanese manufacturer founded in 1898, one of the world’s leading producers of CNC machine tools and proprietary control systems. The OPUS 5000 series represents one of the first open control platforms developed by OKUMA, now fully replaced by the next-generation OSP-P and OSP-P300 systems. All products in the OPUS 5000 family are legacy / discontinued: available exclusively as used, surplus or through specialist repair.

Main Technical Specifications

CNC Control Power Supply Unit – OKUMA OPUS 5000 GHP

The OPUS 5000 GHP is an electronic power supply unit for CNC control (“CNC Control Power Supply Unit”) manufactured by OKUMA, designed as a component of the OPUS 5000 CNC control unit installed on OKUMA machining centres and CNC lathes from the 1980s and 1990s. It converts and regulates the AC mains voltage into the stabilised DC voltages required by the control boards, servo amplifiers, and I/O modules of the system. The suffix GHP identifies the specific variant of this power supply within the OPUS 5000 family.

The power supply is the heart of the CNC control unit’s electrical system: it provides regulated, stable voltages to all active components of the numerical control, from CPU logic to I/O outputs and axis amplifiers. A fault or degradation of its output voltages causes unpredictable CNC behaviour (axis alarms, cyclic CPU resets, parameter loss), immobilising the machine until the unit is replaced or repaired.

OKUMA was founded in 1898 in Nagoya, Japan, and is one of the world’s leading manufacturers of CNC machine tools (lathes, machining centres, grinding machines) and their proprietary control systems. The OPUS series (OPUS 3000, OPUS 5000, OPUS 7000) represents the CNC control generation of the 1980s–1990s, superseded by the open OSP (Open System Platform) still in production today. All products in this family are legacy / discontinued: available only as used, NOS/surplus, or through specialist repair.

Main Technical Specifications

CNC Power Supply – OKUMA MPS 30

The MPS 30 is a switching power supply for CNC control systems (“CNC Power Supply Module”) manufactured by OKUMA Corporation, a Japanese builder of machine tools and CNC control systems. The unit is designed to provide the regulated DC supply voltages required by the logic boards, digital drives, and I/O modules of OKUMA OSP CNC controllers (series OSP700, OSP5000, OSP-U and related). It converts the AC mains input into multiple stabilised and filtered DC outputs. The component is identified interchangeably as MPS30 or MPS 30.

The power supply is the energy backbone of the CNC system: without clean, regulated DC power, the logic boards, communication bus, and servo drives cannot operate reliably. A power supply failure causes an immediate total machine shutdown; excessive ripple on the DC rails can trigger random alarms, positioning errors, or premature degradation of the dependent electronic boards.

OKUMA Corporation was founded in 1898 in Nagoya, Japan, and is one of the world’s leading CNC machine tool manufacturers, designing both the machines (lathes, machining centres, grinding machines) and their own OSP (Open System Platform) CNC control series. The MPS 30 belongs to the power supply family for legacy OSP controls: the product is discontinued and available exclusively as used/NOS surplus or through specialist repair services.

Main Technical Specifications

CNC Power Supply Module – OKUMA MPR10

The MPR10 is a CNC control power supply module (“CNC Power Supply Module”) manufactured by OKUMA, used in the electrical cabinets of CNC machine tools equipped with proprietary OSP (Open System Platform) control systems. The module converts and regulates the supply voltages required by the control boards, axis and spindle drives, and other electronic subsystems of the CNC. The part number is MPR10.

The power supply module is a fundamental element of the CNC system: it converts mains voltage into regulated, filtered DC voltages distributed to all control boards and electronic subsystems. Without regulated power the control system cannot start up and the machine is completely inoperative; a failure of this module typically manifests as a total loss of communication between the control and drives, or as non-clearable power alarms.

OKUMA Corporation is a Japanese manufacturer founded in 1898 in Nagoya, specialising in CNC machine tools (machining centres, lathes, grinding machines) and its own proprietary OSP (Open System Platform) control systems. The high degree of integration between machine and control makes OKUMA electronic components non-interchangeable with those of other manufacturers; products of this generation are legacy / discontinued and available only as used, surplus or through specialist repair.

Main Technical Specifications

Spindle Drive Inverter – OKUMA MIV22-3-V1

The MIV22-3-V1 is a spindle drive inverter (“Motor InVerter / Spindle Drive”) manufactured by OKUMA, documented as a power and control module for the AC spindle motor in OKUMA CNC machining centres and lathes equipped with the proprietary OSP (Open System Platform) control system. The unit manages frequency and voltage conversion to the spindle motor, receiving speed references from the CNC via the OKUMA proprietary bus. Identified by part number MIV22-3-V1 (internal stock code MIV223V1); the prefix MIV stands for “Motor InVerter” in OKUMA nomenclature.

The spindle drive is the electronic converter that transforms the AC mains supply into variable voltage and frequency for the spindle motor, enabling continuous speed regulation as commanded by the CNC program. It is a critical component of the OKUMA drive architecture: failure renders the spindle completely inoperative, causing immediate machine downtime and preventing any machining operation from being carried out.

OKUMA Corporation is a Japanese manufacturer founded in 1898 and a world leader in CNC machine tools and proprietary OSP (Open System Platform) control systems. OKUMA designs and manufactures both machines and controls in-house, ensuring full integration between mechanics and electronics. Components in the MIV series are legacy / discontinued: available exclusively as original spare parts from remaining stock or through specialist repair and spare-part channels.

Main Technical Specifications

Axis Servo Drive – OKUMA MIV06A-1-B5

The MIV06A-1-B5 is an axis servo drive amplifier (“Axis Servo Drive Amplifier”) manufactured by OKUMA Corporation, a component of the axis control system in OKUMA CNC machining centres and lathes equipped with OSP (Open System Platform) control. The manufacturer part number is MIV06A-1-B5 (internal reference: MIV06A1B5). The module belongs to the MIV family of OKUMA servo drives and handles the current and velocity control loops for AC brushless servo motors. The designation “06” indicates the nominal current rating (~6 A continuous); “A1B5” identifies the circuit variant and I/O configuration.

The MIV06A-1-B5 servo drive is the module that converts position and velocity commands from the OKUMA CNC (OSP controller) into three-phase current for the axis servo motor: it closes the current loop in real time and ensures the dynamic response required to follow the machining profile with the demanded precision. If it fails, the controlled axis becomes unavailable, the machine raises an alarm and production stops; on multi-axis machining centres, a single failed drive can halt the entire production cell.

OKUMA Corporation is a Japanese manufacturer founded in 1898, one of the world leaders in CNC machine tools (lathes, machining centres, grinding machines) and proprietary control systems (OSP series). Unlike most builders, OKUMA designs and manufactures in-house the machine, the CNC controller, the motors, and the drives, ensuring a fully integrated and optimised system. Products in the MIV series are considered legacy / discontinued in their older versions, but spare parts and repairs are still supported through specialist service networks.

Main Technical Specifications

Axis Servo Drive – OKUMA MIV05A-1-B5

The MIV05A-1-B5 is an AC axis servo drive (“Axis Servo Drive” / “Motor Inverter”) manufactured by OKUMA Corporation, a core component of the OSP (Open System Platform) CNC control system. The drive manages the current and speed regulation loops of the AC servo motor on the machine axis, receiving position commands from the CNC via OKUMA’s proprietary bus and returning position and speed feedback. The commercial part number is MIV05A-1-B5 (internal reference: MIV05A1B5); the “MIV” designation identifies the Motor Inverter family within the OKUMA range.

The axis servo drive is the power and regulation module that converts CNC position and speed commands into current delivered to the AC axis motor: it closes the current and speed feedback loops, ensuring precise positioning and dynamic response during machining. A failure in this component makes the corresponding axis uncontrollable: the machine halts with an alarm and production cannot resume until the drive is replaced or repaired.

OKUMA Corporation is a Japanese manufacturer founded in 1898, one of the world’s leading producers of CNC machine tools; it operates a vertically integrated model, designing in-house both the machines and the OSP controls, drives and motors. Products in the MIV series belong to earlier generations of OSP controls and are considered legacy / discontinued: sourcing is exclusively through used/surplus channels or specialist repair services.

Main Technical Specifications

Axis Servo Drive – OKUMA MIV01A-1-B5

The MIV01A-1-B5 is an axis servo drive module (“Motor Interface V”) manufactured by OKUMA Corporation, belonging to the proprietary MIV servo drive series. It is documented as a power and control unit for axis servo motors in OKUMA CNC machining centres and lathes equipped with the OSP (Open System Platform) control system. The module closes the position, velocity, and current loops, interfacing with the CNC unit via OKUMA’s proprietary bus. The suffix B5 identifies the hardware/firmware revision; the designation 01A indicates the power class (small-axis drive).

The servo drive is the component that translates position and velocity commands generated by the CNC into power currents for the axis servo motor: it simultaneously manages the position loop, the velocity loop, and the current loop, ensuring dimensional accuracy and dynamic response during machining. A servo drive failure renders the axis completely inoperative, triggers an axis alarm on the machine, and halts all machining operations until the module is replaced or repaired.

OKUMA Corporation is a Japanese manufacturer founded in 1898 in Nagoya, one of the few companies in the world to design CNC machine tools, numerical controls (OSP), and servo drives entirely in-house, ensuring full hardware/software integration. The modules in the MIV family belong to older generations of the OSP system and are legacy / discontinued: available only as used, surplus, or through specialist repair services.

Main Technical Specifications

CNC Power Supply Unit – OKUMA E0451-521-094

The E0451-521-094 is a switching power supply for CNC control systems (“CNC Control Power Supply Unit”) manufactured by OKUMA Corporation, designed to supply the electronic boards of the OKUMA OSP (Open System Platform) CNC controller. The unit converts mains voltage into stabilised DC voltages (+5 V, ±12 V / ±15 V, +24 V DC typical) required by the logic boards, I/O modules and axis drives of the control system. The part number E0451-521-094 belongs to the E04 series of OKUMA electronic spare parts, used on machines equipped with OSP-5000, OSP-7000 and later generation controllers.

The power supply is at the heart of the CNC control’s power distribution: without stable, noise-free voltages, the CPU boards, axis drives and I/O modules cannot operate correctly. A power supply failure causes immediate machine shutdown, undervoltage alarms, random controller resets or corrupted memory data — prompt replacement is essential to restore production and prevent secondary damage to the powered boards.

OKUMA Corporation is a Japanese machine tool manufacturer founded in 1898 in Nagoya; it is one of the few manufacturers worldwide to design both machine tools (machining centres, lathes, grinders) and the proprietary CNC controller (OSP – Open System Platform series) entirely in-house. Spare parts in the E04xx series refer to machines of the OSP-5000/7000 generation and later; older components are legacy / discontinued and available only as used, surplus or through specialist repair.

Main Technical Specifications

DC Power Supply Unit – OKUMA DC-S1A

The DC-S1A is a DC power supply unit (“DC Power Supply Unit”) manufactured by OKUMA, designed to supply regulated DC voltages to the electronic boards of OSP (Open System Platform) CNC control systems. The unit converts the AC mains supply into multiple stabilised DC rails required for the operation of CNC logic circuits, axis drives and interface peripherals. Documented on OKUMA machining centres and lathes fitted with OSP controllers of earlier generations; constructive variants may exist depending on the revision of the control system.

The DC power supply is the core of the CNC electrical infrastructure: without stable, filtered DC voltages no control board can operate. A failure of this unit causes the immediate shutdown of the entire control logic, halting the machine and making any machining cycle impossible. The quality of the output voltages directly affects the reliability of the whole system: even minor fluctuations or drops can corrupt parameters, damage downstream boards or generate intermittent alarms that are difficult to diagnose.

OKUMA Corporation (??????) is a Japanese CNC machine tool manufacturer founded in 1898 in Oguchi, Aichi Prefecture. It is one of the very few manufacturers in the world that designs and builds both its machine tools and its own CNC controllers (OSP – Open System Platform) entirely in-house, ensuring full hardware and software integration. Components of the DCS family belong to earlier controller generations that are now legacy / discontinued: available exclusively as used, surplus or through specialist repair.

Main Technical Specifications

DC Power Supply for CNC Control – OKUMA DCPS-2

The DCPS-2 is a DC power supply module (“DC Power Supply”) manufactured by OKUMA, the Japanese CNC machine tool builder. The module is documented as a component of OKUMA’s OSP series (Open System Platform) CNC controls, where it supplies the regulated DC voltages required by the control system’s electronic boards: CPU boards, I/O modules, communication interfaces, and drive logic stages. The alternative part number is listed exclusively in the specifications table.

The DCPS-2 power supply is responsible for converting and regulating the supply voltages for all the electronic components of the CNC control. A failure of this module typically results in a complete machine shutdown, with the control unable to start and widespread alarm conditions across all axes; it is therefore a critical component for the operational availability of the machine tool.

OKUMA Corporation is one of the world’s leading CNC machine tool manufacturers, headquartered in Oguchi, Aichi (Japan), founded in 1898. It is renowned for developing entirely in-house its OSP (Open System Platform) controls, which equip its lathes, vertical and horizontal machining centres, and grinding machines. Components of the DCPS series belong to older control generations and are to be considered legacy / discontinued: availability is limited to the used, surplus, and specialist repair market.

Main Technical Specifications

10″ Monochrome Monitor – OKUMA D10MM-10A

The D10MM-10A is a 10″ industrial monochrome CRT display unit (“10-inch Monochrome CRT Display Unit”) manufactured by OKUMA, documented as the operator display for the OSP 500 (Open System Platform 500) CNC control. The unit renders the operator interface, part programs, alarm messages and machine axis coordinates on a monochrome phosphor cathode-ray tube. It is fitted on OKUMA CNC lathes and machining centres equipped with the OSP 500 control; hardware revisions may differ in connector type or internal display controller firmware version.

The monitor is the primary visual interface between the operator and the OSP 500 CNC control: it displays part programs, machining parameters, alarms and real-time axis positions. A failed display makes machine supervision and command entry impossible, effectively halting production; on controls of this generation, replacement with an identical or compatible unit is typically the only practical solution, as proprietary-format industrial CRTs do not accept generic direct substitutes.

OKUMA Corporation is a Japanese CNC machine tool builder founded in 1898, headquartered in Oguchi, Aichi. A pioneer in the vertical integration of its own OSP (Open System Platform) controls, OKUMA remains fully independent and active with the current OSP-P300 generation. The OSP 500 control and all associated peripheral components — including this monitor — are legacy / discontinued: available only as used/surplus (NOS) or through specialist repair services.

Main Technical Specifications

BL-IV Brushless Servo Drive – OKUMA BLIV-D100A

The BLIV-D100A is a brushless servo drive (“BL-IV Brushless Servo Drive”) manufactured by OKUMA Corporation, belonging to the BL-IV (Brushless Series IV) drive family. It is documented as a component of OKUMA CNC systems — machining centers, lathes and grinding machines — equipped with the proprietary OSP control system. The D100A suffix in the part number indicates a rated output current of 100 A, positioning this module as a high-torque drive for the main spindle or a primary axis. It manages the speed, current and torque regulation loops for OKUMA brushless servo motors and interfaces with the power section of the machine’s electrical cabinet.

The BL-IV drive is the power electronic unit that converts the digital torque and speed references from the OSP CNC controller into controlled currents for the brushless servo motor, maintaining position, speed and torque with the highest precision throughout each machining cycle. A failure in this drive results in complete loss of control over the associated axis or spindle: the machine halts on alarm and cannot resume production until the unit is repaired or replaced.

OKUMA Corporation, founded in 1898 in Nagoya, Japan, is one of the world’s leading manufacturers of CNC machine tools (lathes, machining centers, grinding machines) and is the only manufacturer in the world that designs and produces in-house the complete technology chain: machine, CNC control (OSP), drives and motors. Products in the BL-IV series are legacy / discontinued: available only as used, NOS surplus, or through specialist repair.

Main Technical Specifications

Brushless Servo Drive – OKUMA BLII-D75/50A

The BLII-D75/50A is a brushless servo drive amplifier (“Brushless Servo Drive Amplifier”) belonging to the BLII-D series, manufactured by OKUMA, a Japanese builder of CNC machine tools. The unit is designed to operate within the proprietary OKUMA OSP (Open System Platform) CNC system, controlling brushless servo motors on linear axes or spindles in OKUMA machining centres and CNC lathes. The part designation identifies the nominal current class of the amplifier (50 A continuous output); the module is installed on the internal DC bus inside the machine cabinet and manages the current and speed loops of the associated motor.

The servo drive is the element that converts the motion references issued by the CNC into controlled current for the brushless servo motor, ensuring precise positioning and stable cutting force throughout the machining cycle. A failure of this module causes total loss of control on the affected axis: the CNC detects the fault, halts the automatic cycle and triggers a drive alarm; the machine cannot resume production until the component is replaced or repaired.

OKUMA Corporation, founded in 1898 in Nagoya, Japan, is one of the world’s leading CNC machine tool builders, renowned for its full vertical integration of machine, motor, drive and proprietary OSP numerical control. The BLII-D drive series belongs to a well-established generation no longer actively marketed through original channels: availability is limited to the used/NOS surplus aftermarket and specialist repair services; this component is to be considered legacy / discontinued.

Main Technical Specifications

Brushless Servo Drive – OKUMA BLII-D50A

The BLII-D50A is a brushless servo drive amplifier (“Brushless Servo Drive Amplifier”) manufactured by OKUMA, part of the BL II (Brushless II) family designed for OKUMA CNC systems with OSP control. The D50A designation indicates a continuous output current class of 50 A, sized for controlling linear and/or rotary axis servo motors on OKUMA machining centres and turning centres. The unit interfaces the power stage with the CNC via OKUMA’s proprietary serial bus and acquires encoder feedback from the brushless axis motor.

The brushless servo drive is the power conversion and regulation unit that governs each machine axis motor: it receives position and speed references from the CNC, converts them into precise three-phase current for the brushless motor, and closes the position, speed, and current control loops. A drive failure renders the affected axis completely inoperable, triggers alarms that halt the entire machine, and prevents any machining until the unit is replaced or repaired.

OKUMA Corporation is one of Japan’s leading CNC machine tool manufacturers, founded in 1898 and listed on the Tokyo Stock Exchange (TSE). The company is renowned for its “One Source” philosophy: it independently designs and manufactures CNC controls (OSP series), motors, drives, and machine tools, ensuring full integration between all system components. Products in the BL II family are legacy / discontinued in the current catalogue: available mainly as used, surplus, or through specialist repair.

Main Technical Specifications