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MITSUBISHI Spindle Drive
Brand: MITSUBISHI -
Cat: Servo Drive
Code:MDS-CH-SPH-260
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CNC Spindle Drive Amplifier – Mitsubishi MDS-CH-SPH-260
The MDS-CH-SPH-260 is a digital spindle drive amplifier (“Spindle Drive Amplifier”) from the MDS-CH series by MITSUBISHI ELECTRIC, designed for MELDAS CNC systems (e.g. MELDAS 64, MELDAS 700, MELDAS 720/730). The part number identifies the SPH family (Spindle High-performance) with power class 260, corresponding to a nominal output of approximately 26 kW. The unit integrates a PWM converter, digital speed and torque regulation loops, and communicates with the CNC controller via a high-speed fibre-optic link.
The MDS-CH-SPH-260 is the power and control module that converts the CNC’s digital references into actual speed and torque at the spindle motor, managing acceleration, steady-state speed during machining, and regenerative braking. A failure in this unit makes the spindle completely unusable with an immediate machine stoppage; typical symptoms include overcurrent, overtemperature, or encoder feedback loss alarms.
MITSUBISHI ELECTRIC is one of the world’s leading manufacturers of industrial automation and CNC systems: its FA division has produced MELDAS controllers and the MDS drive family (servo and spindle) for over forty years. The MDS-CH series represents a generation of compact, highly integrated drives; models in this family are to be considered legacy / discontinued, available only as used, NOS, or through specialist reconditioning.
Main Technical Specifications
| Type | Digital spindle drive amplifier (Spindle Drive Amplifier) – MDS-CH series |
| Part number | MDS-CH-SPH-260 (MDSCHSPH260) |
| Brand | MITSUBISHI ELECTRIC |
| Known application | MELDAS 64, MELDAS 700 / 720 / 730 CNC systems and compatible variants |
| Function | Digital speed and torque regulation of spindle motor; regenerative braking |
| Input voltage | 3~ 200 V AC ±10%, 50/60 Hz (200 V class; 400 V version available) |
| Rated output power | ~26 kW |
| CNC interface | Fibre-optic link – high-speed digital serial communication |
| Feedback | Incremental encoder / resolver from spindle motor |
| Cooling | Internal forced-air cooling (built-in fan) |
| Weight | ~8–15 kg |
| Dimensions | ~300–450 mm (H) × 150–250 mm (W) × 200–300 mm (D) |
| Production status | Legacy / discontinued — used/NOS/repair only |
