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OKUMA Servo Drive
Brand: OKUMA -
Cat: Servo Drive
Code:MIV0404-1-B5
| Combination name | Availability | Price |
|---|---|---|
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 Components in the MIV series belong to superseded OSP generations and are considered legacy / discontinued: available only as used stock, surplus or through specialist repair.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
| Type | CNC axis servo drive unit (Axis Servo Drive / Motor Inverter) |
| Part number | MIV0404-1-B5 (MIV04041B5) |
| Brand | OKUMA Corporation |
| Known application | OKUMA CNC machine tools with OSP control system (machining centres, CNC lathes) |
| Function | Digital position, speed and torque regulation for CNC axis servo motor |
| Input supply | 3-phase AC 200–240 V or 380–480 V, 50/60 Hz (typical MIV series) |
| Output current | ~4 A continuous / ~12 A peak |
| Axis feedback | Incremental / absolute serial encoder (OKUMA OSP proprietary bus) |
| CNC interface | OKUMA OSP proprietary serial bus (dedicated multi-pin connector) |
| Hardware revision | B5 |
| Weight | ~3–6 kg |
| Dimensions | ~200–360 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |
