Product Description:

The KDA 3.2-100-3-AYD-W1 is a spindle drive from Bosch Rexroth Indramat. It belongs to the KDA Spindle Drives series and is part of Series 3 and Version 2. Engineered for precision spindle regulation in CNC and other automated machining centers, the device converts a constant DC bus into three-phase output, modulates motor torque, and forwards synchronization signals so that cutting or forming operations can align spindle speed and position with tool paths. In typical machine use, it works with the spindle motor and higher-level control to keep rotation stable during acceleration, cutting load changes, and synchronized positioning tasks. That makes it suitable for machine tools that require coordinated spindle behavior during tapping, contouring, or speed-regulated machining cycles.

The drive is energized from a DC link rated at 300 VDC, and its power stage can supply a continuous 100 A to the connected spindle motor during normal duty. A separate supply of 220 V/50–60 Hz powers the mounted heat sink blower, which forces air directly across the internal power semiconductors. The unit uses forced cooling, with airflow pushed through the cooling fins to remove heat from the power section. This airflow helps the drive support continuous spindle operation in applications where thermal buildup would otherwise reduce available output. The dedicated blower supply also allows the cooling circuit to operate independently of the DC link that feeds the motor power stage.

The controller operates between 5 to 45 °C, and reliable service is specified up to 1000 m above sea level before additional derating applies. On the control side, a digital position command-value interface accepts incremental setpoints from the CNC, and an auxiliary socket provides synchronous feedback for a second encoder. Speed reference is separate from position control and is introduced as an analog voltage, allowing quick overrides by external potentiometers or PLC D/A outputs. This arrangement supports installations that use digital position commands while still allowing simple external speed adjustment. Separate position and speed paths also let the machine coordinate spindle motion with axis movement while maintaining an independent reference for speed trimming.