Product Description:

The KDA 3.2-100-3-DYD-W1 spindle drive is produced by Bosch Rexroth Indramat and belongs to the KDA Spindle Drives series. It is internal series 3 and version 2. The unit functions as the power and control stage between the DC link of an Indramat supply module and a high-speed machining spindle. By integrating with CNC controllers, the drive converts digital speed or position commands into regulated armature current. That control helps the spindle maintain stable torque and precise velocity during milling, drilling, or grinding operations, even as cutting load changes through the cycle.

The drive draws power from a DC bus rated at 300 VDC and can deliver up to 100 A of continuous output current to the spindle motor. Thermal energy created by this current is removed through a mounted heat sink blower that operates on 220 V AC at 50–60 Hz. Air is forced directly across the fins, a method identified as forced cooling. This airflow keeps internal component temperatures within an ambient range of 5 to 45 °C, helping the drive avoid thermal derating during normal operation. Active airflow is useful when nearby cabinet equipment adds extra heat during long machining cycles.

The speed reference arrives as a 16-bit parallel word, while the auxiliary channel accepts a digital position command value for synchronized spindle orientation. A dedicated second encoder input can be used for high-resolution feedback or for aligning multiple axes through a real-time synchronous signal. The additional feedback path improves control accuracy when the spindle must hold a commanded angular position or follow coordinated machine motion. Installation is permitted up to 1000 m above sea level. This arrangement supports machine tools that rely on repeatable spindle control and consistent response.