Product Description:

Bosch Rexroth Indramat produces the KDA 3.1-050-3-LP0-U1 as a spindle drive in the KDA Spindle Drives series. It converts energy from a regulated DC bus into controlled three-phase output for machining spindles and other rotary axes that require stable speed control. In CNC-based systems, the unit works with external velocity and position loops so commanded speed changes and motion corrections can be handled with consistent response. Because it is a spindle-oriented module, it suits applications that prioritize speed regulation and repeatable rotational control. This operating role fits metal-cutting equipment and similar automation cells where spindle behavior must remain steady during changing process demands.

The drive has a continuous output current of 50 A and operates from a 300 VDC bus. Speed commands are transmitted through the SERCOS Interface, which lets the module exchange motion data over a fiber-optic network instead of relying on analog references. Cooling air is supplied from a separate 115 V 50/60 Hz source, and the heatsink uses forced cooling to remove thermal losses during rapid spindle operation. This arrangement supports stable operation when the spindle accelerates, decelerates, or holds a commanded speed under changing load. The unit has no additional interface option, so auxiliary fieldbus and I/O cards are not included.

A mounted heatsink blower supports stable operation in ambient air from 5 to 45 °C. The drive is intended for installation at elevations up to 1000 m, where airflow remains suitable for normal cabinet use. A second encoder input allows the control system to accept spindle position signals or feedback from an additional motor transducer when the unit is used on a feed axis. This added feedback path broadens the ways the drive can be assigned within a machine platform. It also supports systems that need either spindle-oriented sensing or encoder-based axis monitoring on the same machine.