Product Description:

The Bosch Rexroth Indramat KDA 3.2-050-3-D0D-U1 belongs to the KDA Spindle Drives series. The drive converts DC-bus energy from the machine power supply into regulated three-phase output for high-speed motor operation. Within an automation cell, it acts as the closed-loop amplifier for the spindle axis, taking speed or position references from the CNC controller and applying the corresponding current to an induction or synchronous spindle motor. This role supports stable spindle acceleration, controlled deceleration, and accurate speed holding during cutting, drilling, turning, and grinding processes. Because spindle response directly affects surface finish and tool engagement, the unit is used where consistent rotary control is required throughout the machining cycle.

Its power stage is energized from a DC link of 300 VDC, and the current regulators can deliver a continuous output of 50 A to the motor windings. Thermal energy from the switching devices is removed by a mounted heat sink blower, and the integral fan is powered by 115 V/50-60 Hz. This forced cooling arrangement allows rated output when the cabinet is properly ventilated and helps maintain stable operation during sustained spindle loading. Digital speed demand is accepted through a 16-bit parallel interface, while a separate digital position command path supports fine interpolation when the CNC coordinates the spindle with feed axes. That arrangement is useful in machine tools where spindle motion must remain synchronized with programmed tool paths.

The drive is rated for continuous duty from 5 to 45 °C and at elevations up to 1000 m above sea level, which suits typical industrial installations. A second encoder input is not included, so spindle orientation feedback returns through the primary encoder channel rather than through a separate auxiliary feedback device. The unit is Series 3 and Version 2. These identifiers indicate the product generation used for this controller and distinguish it from earlier builds in the same drive family. The operating range is intended for standard shop environments where the electrical cabinet has normal ventilation and the altitude remains within the stated limit.