Product Description:

The SF-A4.0230.030-10.070 is a rotary servo stage engineered by Bosch Rexroth Indramat and placed within the SF Servo Motors series. Serving as an electromechanical actuator, it takes regulated current from a matched drive, develops magnetic torque in its stator, and turns the load shaft according to commanded position data. This ability to translate electrical setpoints into repeatable mechanical motion makes the unit suitable for automated transfer lines, packaging machinery, and tool-handling equipment where cycle time and positional accuracy must be maintained.

The motor operates from a DC intermediate circuit rated at 670 V, giving the drive sufficient electrical headroom for quick acceleration events. Under nominal conditions, it reaches 3000 rpm, a speed that balances throughput with mechanical life for medium-inertia loads. Its electromagnetic design delivers 1.57 Nm/A, so each ampere of phase current produces nearly one and a half newton-meters of torque. When the rotor is locked, the winding can accept 14 A, resulting in a stall torque of 22 Nm. An absolute encoder is mounted on the shaft to provide continuous position feedback to the controller.

Feedback precision is supported by an accuracy of ±20 arcsec and a native resolution of 8 million increments per revolution, enabling sub-arc-minute positioning without mechanical gearboxes. The mechanical interface follows the ISO flange pattern of 142 mm, simplifying interchange with other frame-size drives. Total reflected inertia, including the encoder, is 54 × 10⁻⁴ kg·m², which affects dynamic response when the stage is matched to the driven load. Two NTC thermal sensors embedded in the windings report temperature to the drive for overload protection in real time, while the absolute encoder retains position information after power loss so restart homing is unnecessary.