Product Description:

The KDA 2.1-100-3-AYI-U1 spindle drive is manufactured by Bosch Rexroth Indramat within the KDA Spindle Drives series. The device acts as a regulated inverter that powers machine-tool spindles, allowing the automation system to issue velocity or orientation commands while the drive handles current and torque regulation. By using encoder feedback, the unit keeps spindle speed consistent during cutting and quickly synchronizes rotational position for tapping, indexing, and tool-change sequences in industrial automation cells.

Electrical energy is supplied from a shared DC link held at 300 VDC, and the drive can deliver up to 100 A of continuous output current to the spindle motor windings. Thermal management relies on a mounted heat sink blower that expels waste heat directly from the rear plate, and the blower itself runs from an auxiliary line rated at 115 V/50–60 Hz. Because airflow is directed over the fins rather than relying on cabinet convection, the unit uses forced cooling to sustain full current when airflow is unobstructed. Speed information reaches the power electronics through encoder channels, and torque commands are produced accordingly.

The drive functions in ambient temperatures from 5 to 45 degrees Celsius and can operate at elevations up to 1000 m above sea level, which suits most shop-floor locations. For position verification, the control panel exposes an incremental encoder output, while a separate socket accepts a second encoder input with a synchronous-pulse line so multi-turn or spindle-orientation sensors can be connected without external splitters. Velocity references arrive as an analog signal, allowing simple gain scaling from CNC or PLC hardware that already provides ±10 V speed commands.