Product Description:

Bosch Rexroth Indramat manufactures the SF-A3.0042.030-14.053, a member of the SF Servo Motors series. This AC servo motor is intended for precise speed and position control in automated machinery such as pick-and-place robots, feeders, and indexing stations. By pairing its electromagnetic brake with a digital drive controller, the motor can both generate motion and hold loads at rest, providing a single-package solution for compact axes in industrial automation.

The motor reaches a rated shaft velocity of 3000 rpm, allowing typical servo cycles to run at that speed without derating. Back electromotive force follows a sinusoidal waveform, which helps the drive achieve smooth torque production with minimal harmonic distortion. The holding brake is energized from a control supply of 24 V DC ±10%; this tolerance allows standard control power rails to operate the brake coil without separate conditioning. When engaged, the brake can resist up to 10.0 Nm of load moment, preventing unintended motion during shutdown or emergency stops. Its operating mode uses the rest-current principle, meaning residual magnetism is canceled by a small holding current to release the rotor quickly after de-energization.

Motion feedback is supplied by an integrated absolute encoder, so the drive knows the rotor angle immediately at power-up and no homing routine is required. The sensor offers a resolution of 8,000,000 increments per revolution, enabling very fine position increments even at maximum speed. Positional deviation stays within ±20 arcsec, a tolerance suitable for multi-axis interpolation in assembly or electronics placement equipment. Brake performance consistency is characterized by a ripple of 5%, limiting torque variation that could otherwise introduce mechanical chatter when the shaft is locked.