Product Description:

The TDA 1.1-100-3-APS spindle controller is manufactured by Bosch Rexroth Indramat and belongs to the TDA Main Spindle Controllers series. Intended for numerically controlled machine tools, it drives and supervises the main spindle motor by interpreting command voltages, supplying regulated current, and evaluating high-resolution encoder signals. This closed-loop operation enables precise speed and position control that is essential for turning, milling, or grinding processes in automated production cells.

The power section can deliver up to 100 A, and its thermal design supports a continuous current of 70 A up to the nominal ambient limit without derating. The controller draws energy from a DC link at 300 VDC, which supports rapid acceleration of large-inertia spindles. Speed references arrive through a differential input that accepts analog ±10 V signals, making the controller compatible with most CNC control cards. A built-in RS-232C interface provides parameter access and diagnostic readouts from a host PC or HMI terminal. Supplemental supplies include a 24 V logic rail that sources 1.4 A for sensors and relays, a dual ±15 V bus rated at 160 mA for encoder electronics, and a 220 VAC blower feed that can be routed to a cabinet fan.

High-precision motion is supported by a spindle position granularity of 1/4,000,000 rev, while rotor position feedback for secondary axes is digitized down to 1/2,000,000 rev. Reliable service is maintained within a cabinet temperature not exceeding +45 °C; above this point, output current must be reduced, with operation possible up to +55 °C. Installations are permitted at elevations up to 1000 m without additional cooling provisions, and the enclosure has an IP10 protection rating for use in controlled electrical cabinets. The controller weighs 10.5 kg, which helps keep panel mounting manageable while retaining enough thermal mass for short overload events.