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Industrial CNC Floppy Disk Drive – LAND LDS-3WAS
The LDS-3WAS is an industrial 3.5” floppy disk drive (“Industrial Floppy Disk Drive”) manufactured by LAND, designed specifically for use on computer numerical control machines. The unit supports standard DD (720 KB) and HD (1.44 MB) formats and is equipped with a 34-pin interface compatible with the conventional floppy bus adopted by major CNC manufacturers. The device is conceived as a direct drop-in replacement for the original floppy units installed in CNC control panels of the 1980s–1990s–2000s generations.
The floppy disk drive is the mass storage device that enables part program transfer (ISO/DIN files) to and from the numerical controller, as well as the saving and restoration of machine parameters, tool offsets, and configuration data. A drive failure prevents loading new programs and backing up critical data, halting production or exposing the machine to the risk of irreversible configuration loss in the event of work on the controller.
LAND is a manufacturer specialising in floppy disk units and storage peripherals for industrial applications, with a catalogue focused on the CNC, metrology and factory automation sectors. The LDS product range is designed as direct drop-in replacements for original units fitted by manufacturers such as Fanuc, Siemens, Mitsubishi and Yasnac. This product type is legacy / discontinued in its original magnetic floppy versions; units are now found mainly as used/surplus stock or replaced by drop-in USB emulators.
Main Technical Specifications
| Type | Industrial 3.5” floppy disk drive for CNC |
| Part number | LDS-3WAS (LDS3WAS) |
| Brand | LAND |
| Known application | Various CNC machines (machining centres, lathes, milling machines) – compatible with Fanuc, Siemens, Mitsubishi, Yasnac and other systems with standard floppy bus |
| Function | Reading and writing CN part programs (ISO/DIN), machine parameter and tool offset backup and restore |
| Disk format | 3.5” – DD 720 KB and HD 1.44 MB |
| Interface | Standard 34-pin floppy connector |
| Power supply | +5 V DC |
| Disk rotation speed | 300 RPM (standard 3.5” floppy) |
| Weight | ~0.3–0.5 kg |
| Dimensions | ~101 × 42 × 146 mm (standard 3.5” half-height) |
| Production status | Legacy / discontinued — available as used/surplus; USB emulator replacement recommended |
Servo Axis Drive Module – MAZAK D72JV007910
The D72JV007910 is an electronic servo axis drive module (“Servo Axis Drive Unit”) manufactured by MAZAK (Yamazaki Mazak Corporation), used in CNC machining centres and lathes equipped with the proprietary MAZATROL control system. The module manages the position, speed and current regulation loops of the servo axis motor, interfacing with the machine’s CN board and with the motor via encoder or resolver. The factory part number D72JV007910 uniquely identifies this unit within the MAZAK spare-parts architecture; no distinct alternative part number is documented.
The servo axis drive module is the electronic core that converts position commands issued by the CNC into precise phase currents for the servo motor: it manages the current loop, speed loop and position loop in real time, ensuring dimensional accuracy and repeatability of axis movements. A failure in this component completely locks the controlled axis, making the machine inoperable; partial degradation causes oscillations, dimensional errors and drive alarms on the MAZATROL panel.
Yamazaki Mazak Corporation, founded in Japan in 1919 and headquartered in Oguchi (Aichi Prefecture), is one of the world’s largest manufacturers of CNC machine tools: vertical and horizontal machining centres, multitasking turning centres and FMS systems. The MAZATROL control system is developed in-house and defines the entire product range. Electronic components of the D72JV series belong to control generations no longer in production: legacy / discontinued, available exclusively as used, surplus or through specialist repair centres.
Main Technical Specifications
| Type | Servo axis drive module (Servo Axis Drive Unit) |
| Part number | D72JV007910 |
| Brand | MAZAK – Yamazaki Mazak Corporation |
| Known application | MAZAK CNC machining centres and lathes with MAZATROL control (D72JV-compatible series) |
| Function | Servo axis motor position, speed and current regulation |
| Speed reference | MAZATROL digital serial bus / analogue signal ±10 V (typical) |
| Feedback | Incremental encoder or resolver from servo axis motor |
| Supply voltages | 200–240 V AC three-phase / internal DC bus (typical MAZAK installation) |
| Logic supply voltages | ±15 V and +5 V DC (typical) |
| Interfaces / connectors | Edge and comb connectors for CN bus, encoder feedback, power supply and motor output |
| Weight | ~1.0–3.0 kg |
| Dimensions | ~150–350 mm |
| Production status | Legacy / discontinued — used / surplus / repair only |
CNC Servo Drive – MAZAK MV4-200 W
The MV4-200 W is an electronic servo drive module for CNC control (“Servo Drive / Servo Amplifier”) manufactured by Mazak (Yamazaki Mazak Co., Ltd.), documented as the axis motion power amplifier in CNC vertical machining centres of the MV series (specifically the MV-4) equipped with the Mazatrol CNC control. The module integrates power amplification and speed/current regulation functions for the axis servo motor, interfacing with the Mazatrol CNC unit via a dedicated bus. The designation “200 W” denotes the nominal output power rating to the servo motor.
The servo drive is the electronic component that receives position and speed commands from the Mazatrol CNC unit and converts them into power current for the axis servo motor: it closes the position, speed, and current control loops, ensuring precision and repeatability in the machine’s movements. A drive failure causes immediate axis lock, a CNC alarm, and prevents any machining operation until the module is replaced or repaired.
Yamazaki Mazak Co., Ltd. is one of the world’s leading CNC machine tool manufacturers, founded in 1919 in Oguchi, Japan; it produces machining centres, CNC lathes, laser systems, and the proprietary Mazatrol numerical control. Components from the MV series of the 1980s–1990s are legacy / discontinued: availability is limited to the used market, NOS surplus stock, or through specialist repair services.
Main Technical Specifications
| Type | CNC servo drive – Axis power amplifier module (Servo Drive / Servo Amplifier) |
| Part number | MV4-200 W (MV4200W) |
| Brand | Mazak – Yamazaki Mazak Co., Ltd. |
| Known application | CNC vertical machining centre Mazak MV series (MV-4 and compatibles), Mazatrol control |
| Function | Power amplification and speed/current regulation for CNC axis servo motor |
| Rated power | ~200 W (from part number; verify on nameplate) |
| Supply voltage | ~200–230 V AC three-phase |
| Interfaces / Connectors | Dedicated connectors to Mazatrol CNC unit and axis servo motor; power terminal strip |
| CNC system | Mazatrol (T-2, M-2 or compatible variants for the MV series) |
| Weight | ~1–3 kg |
| Dimensions | ~150–300 mm |
| Production status | Legacy / discontinued — available as used, NOS surplus or through specialist repair only |