Product Description:

The Bosch Rexroth Indramat RAC 2.3-200-460-AP0-Z1 is an AC main spindle drive controller in the RAC Spindle Drive Controllers series. Classified as series 2 and version 3, it governs three-phase spindle motors in CNC machining centers. By converting fixed mains power into a variable, feedback-regulated output, the unit delivers dynamic speed and torque adjustment that supports high-precision cutting cycles and rapid tool changes in industrial automation lines.

The power section is dimensioned for a continuous output of 200 A, allowing direct coupling to large-frame spindle motors without external autotransformers. Supply compatibility includes 3 x AC 400 V industrial grids at 50 Hz; a tolerance of ±15% supports operation during voltage swings, while an alternate input of 3 x AC 460 V covers North American mains. Together, these parameters affect thermal dissipation, fuse sizing, and cable cross-sections in the cabinet. Motor acceleration profiles are managed through current-controlled vector algorithms that respond to spindle feedback, keeping torque linear across the speed range and preventing overload during heavy material removal.

Thermal stability comes from the internal blower that moves air across the heat sinks whenever regeneration occurs, and any excess energy is routed to the built-in additional bleeder for resistive dumping. Position and velocity loops benefit from the high-resolution INDRAMAT encoder signal, and an auxiliary channel accepts a second encoder when dual-loop accuracy is needed for spindle orientation. Field wiring is concentrated on the 9-pole X4 terminal, and velocity references enter as an analog (±10 V) command. These interfaces allow the controller to synchronize with CNC controls while minimizing latency between command issuance and spindle response.