Q&A: Learn how to test and repair servo motors

RF: Why did the servo motor stop functioning?

SM: There are several components that wear out over time, such as bearings or brakes. The motor may also stop working due to debris or oil accumulating in the housing. The encoder may stop functioning due to a problem with the glass plate or electronics.

RF: How do you know if a servo motor is faulty?

SM: Sometimes you may notice that your machine stops, operates intermittently, or becomes less efficient. Some servo drives and test products also report errors.

RF: Can servo motors be repaired?

SM: Yes, there are many servo motor repair shops that offer testing, refurbishment and repair services depending on whether the various parts in the servo motor are worn or damaged.

RF: What are the advantages of testing or repairing servo motors?

SM: It helps to simply understand which part of the machine may be causing the malfunction, such as a servo motor, servo drive, or programming or wiring issue.

Many technicians have learned how to calibrate and verify encoders, allowing them to repair motors and get them back up and running quickly. The biggest cost benefit is reduced downtime, as lead times for new servo motors can vary. Repairing servo motors also has ecological benefits by avoiding scrapping the motor.

RF: How do you test servo motors?

SM: There are a variety of instruments that can be used to test the resistance of motor windings, test the functionality of an encoder, or run test servo motors.

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