MITSUBISHI Spindle Drive

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Spindle Drive Amplifier – MITSUBISHI MDS-B-SP-260

The MDS-B-SP-260 is a spindle drive amplifier (“Spindle Drive Amplifier”) belonging to the MDS-B series by Mitsubishi Electric, designed for speed and position control of the spindle motor in CNC machining centres and lathes equipped with Mitsubishi M700, M500 CNC controllers and compatible MDS-B systems. The unit belongs to the SP (Spindle) subfamily of the MDS-B series, with an rated output of approximately ~26 kW; it manages the current and speed regulation loops of the spindle motor via a high-speed serial bus to the CNC unit. Compatible with Mitsubishi SJ series spindle motors; accepts tachogenerator or motor-integrated encoder feedback.

The spindle drive amplifier is the power and regulation unit that receives the speed reference from the CNC and supplies the spindle motor with the current and voltage required to maintain stable rotation during machining operations. In the event of failure the spindle becomes uncontrollable: the machining cycle cannot be started and the machine stops completely. Its integrity is therefore a prerequisite for any milling, turning or drilling operation.

Mitsubishi Electric is one of the world’s leading manufacturers of CNC systems and drives for machine tools, with a consolidated presence in the sector since the 1980s. The MDS-B series has been progressively superseded by the MDS-C1 series and subsequently by the MDS-D / MDS-EX series; MDS-B products are therefore to be considered legacy / discontinued, available only as used parts, NOS surplus or through specialist repair services.

Main Technical Specifications