Product Description:

The TDA 1.3-100-3-API main spindle controller is produced by Bosch Rexroth Indramat and belongs to the TDA Main Spindle Controllers series. The unit is engineered to drive and regulate three-phase spindle motors in machining centers and turning equipment. By processing velocity commands from the machine control and monitoring positional feedback, it delivers accurate speed regulation and oriented stopping, which are required for rigid tapping, C-axis interpolation, and tool change synchronization.

It provides a continuous phase current of 70 A, allowing sustained cutting duty without thermal overload, while its maximum current capacity reaches 100 A for short acceleration bursts. The internal DC link is rated at 300 VDC, so the connected supply and braking chopper must be dimensioned for that bus level. Speed references are accepted through a ±10 V analog input, simplifying integration with standard CNC velocity outputs. A blower that requires 220 VAC supplies cooling air to remove heat from the power stage. The enclosure has an IP 10 rating, so the electronics must be installed in a closed electrical cabinet to avoid dust contamination.

Alongside the current, voltage, and cooling attributes detailed above, the controller offers an incremental encoder output with up to 360000 increments/rev to feed external control loops, and it can accept feedback from either the spindle sensor or a second motor through the designated encoder input. Internal interpolation refines the mechanical angle down to 1/4000000 rev for positioning commands and resolves rotor position to 1/2000000 rev for commutation. The housing stands 390 mm high, 150 mm wide, and weighs 10.5 kg, dimensions that facilitate dense multi-axis racks. Operation is permitted up to 55 °C ambient and 1000 m elevation, allowing placement in most production shops without derating.