Product Description:

The KDA 3.1-100-3-L0I-W1 is a spindle drive produced by Bosch Rexroth Indramat and positioned within the KDA Spindle Drives series. As a spindle-oriented power module, it converts the common DC bus voltage from an Indramat supply unit into three-phase output for high-speed motor operation, allowing CNC machines to regulate tool speed precisely during metal-cutting or forming cycles. This arrangement supports stable spindle control during rapid changes in load and commanded speed. The drive supports modular cabinet layouts because its heat sink and blower are mounted as an integral package, minimizing additional thermal hardware.

This model draws its logic and power electronics from a shared DC bus rated at 300 VDC, while the power section can deliver a continuous output of 100 A to matched spindle motors. To keep internal temperatures stable, the heat sink blower is fed by an auxiliary source of 220 V 50-60 Hz; the unit uses a mounted heat sink blower fixed directly to the rear fin stack. Airflow follows a forced cooling method that removes heat even during low-speed spindle operation. The unit may be installed in production areas with an ambient temperature range of 5 to 45 °C. It transmits actual speed feedback over an incremental encoder channel and reads primary position data through the main encoder connector, supporting closed-loop spindle control during speed changes.

Functionality is maintained up to 1000 m above sea level without derating, and higher altitudes require current reduction. Velocity commands are accepted through the SERCOS interface, allowing coordinated motion with Indramat MMC and CLC controllers. This communication path supports synchronized spindle operation with the rest of the machine control system. For auxiliary measurement, an incremental encoder output mirrors spindle position to external recorders, and no secondary encoder input is provided. That arrangement keeps the feedback path limited to one primary source and simplifies the wiring layout.