Product Description:

The KDA 3.2-050-3-DYS-U1 spindle drive is manufactured by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. In a CNC or production cell, this drive regulates high-speed spindle motors, translating digital speed commands from a motion controller into controlled three-phase output that maintains torque and surface finish on machined parts. As a dedicated spindle drive, it feeds induction or permanent-magnet spindles in machining centers, grinders, and automated transfer lines, coordinating acceleration and deceleration profiles with the machine controller. This supports steady spindle behavior during rapid speed changes and varying cutting loads. Because spindle speed directly affects cut quality, the control stage is intended to hold commanded velocity closely during acceleration, deceleration, and constant-speed operation.

Its power section is designed for a DC bus of 300 VDC, allowing the unit to draw a continuous phase current of 50 A without derating. An auxiliary input of 115 V/50–60 Hz powers the internal cooling hardware without loading the DC link. The drive accepts a digital 16-bit parallel speed command, giving the controller fine velocity resolution for spindle positioning during tapping or contour milling. An RS-232C serial interface is provided for parameter setup and diagnostic communication with external control equipment.

Thermal management relies on a mounted heat sink blower that provides forced cooling, allowing reliable operation in ambient temperatures from 5 to 45 °C. The module also includes a second encoder socket for an additional feedback channel and synchronous input, which supports applications that compare spindle motion against a secondary reference. This layout suits enclosed control cabinets where directed airflow is available across the cooling surfaces. Installation is permitted up to 1000 m above sea level without performance loss. The unit is Series 3 and Version 2.