Description
Siemens Servo Motor Repair
A Siemens servo motor (e.g. the SIMOTICS S 1FK/1FT series) is a precision motor used in automated machinery and CNC, with a built-in feedback encoder/resolver so a drive can control position, speed, and torque accurately. As an electromechanical device, its faults concentrate in the windings, the bearings, the feedback encoder, and the connections/brake.
June Company repairs Siemens servo motors for machine builders, automation integrators, and maintenance teams.
Common Siemens servo motor problems we fix
- Feedback encoder/resolver faults — lost or erratic position feedback causing drive faults, repaired or replaced so the drive controls the motor correctly.
- Bearing wear — noise, vibration, or roughness, the bearings replaced.
- Winding faults — shorted or open windings, diagnosed and repaired/rewound.
- Holding-brake faults — the integrated brake not releasing or holding, repaired.
- Connector or feedback-cable faults.
FAQs
My drive faults out on this motor’s feedback — fixable? Yes. Encoder/resolver feedback faults are a common servo failure and they’re repairable; we restore feedback and verify the motor runs and reports position correctly.
Do you test it under power? Yes — torque/feedback behavior is verified before return, with documented results.
Every repair includes a 90-day parts-and-labor warranty. Email us or submit a service request.








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