TDA Main Spindle Controllers

TDA Main Spindle Controllers are Bosch Rexroth Indramat modular digital AC spindle controllers used with 2AD asynchronous main spindle motors and 1MB frameless spindle motors in CNC machine-tool applications. The series is designed for rigid spindle regulation, broad constant-power speed operation, and precise spindle behavior in demanding machining systems. TDA controllers include internal position-control capability for automatic spindle orientation during tool or workpiece changes, using direct motor feedback in 1:1 drive arrangements or an additional spindle encoder for belt-driven and geared spindle designs. When used for C-axis operation, the controller can operate the spindle as an interpolating servo axis with high-resolution position control and selectable incremental encoder-style output to the CNC for accurate low-speed positioning. Setup is handled through parameter-based commissioning, with machine and motor data stored on a plug-in programming module for repeatable configuration. Command integration can be matched to the CNC system through analog speed input, 16-bit parallel digital command input, or SERCOS communication for real-time command, feedback, and parameter exchange.