Product Description:

The KDA 3.2-100-3-D0I-U1 is a spindle drive produced by Bosch Rexroth Indramat within the KDA Spindle Drives series. As a spindle-oriented controller, it supplies regulated power to high-speed motor spindles so machining centers and turning equipment can maintain accurate surface speeds during cutting, drilling, or grinding. This helps the spindle respond predictably when the commanded speed changes during different machining steps. Because the unit is intended for spindle service, its control behavior suits applications where speed stability directly affects surface finish and tool performance. The drive is version 3.2 in the series and uses a dedicated heatsink blower to remove switching losses while the integrated logic accepts digital speed references from the host CNC.

The power section is energized from a DC link rated at 300 VDC, and the device can deliver a continuous line current of 100 A. This combination supports sustained spindle demand during continuous machining duty. Thermal management relies on forced cooling, and the blower that moves air across the heatsink is powered by an auxiliary supply of 115 V/50-60 Hz. Speed data arrive through a digital 16-bit parallel bus, allowing fine spindle speed adjustment with minimal processing delay. A secondary encoder socket is omitted, so any additional feedback channel must be provided externally when a separate encoder path is needed.

The integral heatsink-mounted blower supports heat dissipation across an ambient range of 5 to 45 °C. The stated temperature range supports installation on typical factory floors with enclosed electrical equipment. Installation is permitted up to 1000 m above sea level. Position and velocity feedback are made available to the machine controller through an incremental encoder output, which duplicates the primary encoder signals for monitoring and external display devices. This output can be used by the surrounding control system when spindle motion needs to be observed outside the main drive channel.