Product Description:

The Bosch Rexroth Indramat KDA 3.1-100-3-A0D-W1 belongs to the KDA Spindle Drives series and functions as a drive module for main-spindle motors in automated machining cells. By processing speed and torque references from the motion controller, it stabilizes spindle motion during cutting, drilling, and grinding tasks while supporting smooth response to changing load conditions. This unit is delivered as the Series 3 version and is intended for spindle control duties that require consistent dynamic behavior during long production runs.

The drive draws up to 100 A of output current from a DC link rated at 300 VDC. Its heatsink blower is powered from a separate 220 V/50–60 Hz source, so fan operation does not add load to the DC bus. A mounted heatsink blower moves air directly across the power semiconductors, and the unit uses forced cooling to manage heat during sustained spindle operation. Because the drive does not include an additional encoder input, the single feedback channel carries the speed and position data used by the control loop. Internal logic accepts spindle speed references through an analog channel, while the digital bus carries preparatory commands and fault reporting.

Permissible service conditions span 5 to 45 °C, and reliable operation is maintained up to 1000 m above sea level without derating. A supplementary interface transfers a digital position command value that complements the primary speed reference, enabling coordinated contour and velocity control on complex tool paths. The speed reference input is analog, which gives the host CNC straightforward voltage-to-rpm scaling for rapid setpoint updates. This combination of control interfaces supports spindle applications that need both continuous speed regulation and responsive position-related commands during machining sequences.