Product Description:

The TDA 1.1-100-3-A00 main spindle controller is produced by Bosch Rexroth Indramat within the TDA Main Spindle Controllers series. It regulates spindle motors in machining centers by converting DC bus energy into three-phase output and by processing analog speed references from the CNC. The unit mounts vertically inside a control cabinet and forms part of an integrated drive rack, supplying high current for rapid acceleration and precise RPM regulation during metal-cutting or grinding operations. Its rack-based layout keeps the controller aligned with the rest of the drive system and supports compact cabinet installation.

The controller delivers a continuous output of 70 A, while its short-term current capability reaches 100 A for acceleration peaks. An internal DC link stabilized at 300 V manages energy exchange with the upstream supply. Heat is removed by air inside the control cabinet, so the drive relies on forced airflow rather than an external heat sink. Speed reference is accepted through an analog ±10 V input, allowing direct connection to conventional CNC velocity loops. During standby, the ±15 V auxiliary rail imposes a 160 mA load, and the 24 V control bus draws 1.4 A to power the logic circuits. A Class F humidity tolerance helps protect the internal insulation, and the motor terminals must be tightened to 5 Nm.

The device functions at ambient temperatures up to +55 °C when cabinet airflow is adequate, and reliable operation is permitted up to 1000 m altitude without derating. Its housing carries a protection rating of IP10, which suits rack installation where the surrounding enclosure provides the main barrier against dust and contact. There is no additional encoder input and no auxiliary communication interface, so feedback is handled by the associated spindle module. The unit has a weight of 10.5 kg, which matters when several drives are mounted on one backplate. This arrangement leaves most external physical protection to the cabinet around the drive.