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Dual-Axis Servo Drive – MITSUBISHI MDS-B-V2-1010
The MDS-B-V2-1010 is a dual-axis servo drive unit (“Dual-Axis Servo Drive Unit”) from the MDS-B series manufactured by Mitsubishi Electric. It is documented as a component of CNC systems with Mitsubishi M64, M65, M640, M650 controllers and other systems compatible with the SSCNET bus. It provides full digital control of torque, speed and position for two servo motor axes simultaneously, operating in conjunction with the MDS-B-CV converter unit which supplies the shared DC bus. The V2 suffix designates the two-axis configuration; the code 1010 indicates a rated current of 10 A per axis.
The dual-axis servo drive is the core of the machine’s axis control: it receives position references from the CNC via SSCNET, closes the current, speed and position loops on each motor, and ensures the synchronisation required for accurate interpolation. A failure of the MDS-B-V2-1010 renders both controlled axes inoperative, completely halting machining and triggering position or overcurrent alarms on the operator panel.
Mitsubishi Electric is one of the world’s leading manufacturers of CNC systems, servo motors and drives for machine tools. The MDS-B series was produced from the late 1990s to the early 2000s and is now legacy / discontinued, superseded by the MDS-C1, MDS-D and MDS-EJ series. Spare parts are available exclusively as used, surplus or through specialist repair centres.
Main Technical Specifications
| Type | Dual-axis servo drive unit |
| Part number | MDS-B-V2-1010 (MDSBV21010) |
| Brand | Mitsubishi Electric |
| Known application | Mitsubishi CNC M64, M65, M640, M650 – machining centres, milling machines, CNC lathes |
| Function | Torque, speed and position regulation for 2 servo motor axes |
| DC bus supply | Shared DC bus from MDS-B-CV converter unit (typical 300–400 V DC) |
| Rated current | 10 A per axis (2 × 10 A) |
| CNC interface | SSCNET (Serial Servo Communication Network) – serial optical/electrical |
| Feedback | Serial encoder per axis |
| Connectors | Axis power connectors (U/V/W ×2), encoder connectors ×2, SSCNET connector, DC bus connector |
| Weight | ~3–6 kg |
| Dimensions | ~200 × 100 × 250 mm |
| Production status | Legacy / discontinued — used/surplus/repair only |