Servo Motor Troubleshooting
Common Servo Motor Issues & Possible Causes
The repair technicians at TigerTek have seen it all when it comes to broken servo motors, but some issues are more common than others. Even with a strict regimen of upkeep and preventative maintenance, a servo motor failure can (and will) happen during operation. Here's a list of common problems & some tips on troubleshooting your servo motor.
Issue: No Rotation
- The motor connections are loose or open.
- Foreign matter is lodged in the motor.
- The motor load is excessive.
- The bearings are worn.
Issue: Overheating
- The rotor is partially demagnetizing causing excessive motor current.
- Motor voltage is exceeding the maximum value.
- The duty cycle is excessive.
Issue: Abnormal Noise
- Loose parts are present in the motor.
- Through bolts are loose.
- The bearings are worn.
- GAIN setting is too high.
Issue: Erratic Operation (motor locks into position, runs without control or with reduced torque)
- Phases A & B, A & C or B & C reversed
- Sine, Cosine or Rotor leads reversed
- Sine, Cosine, Rotor lead sets reversed
- Combinations of 1, 2, 3
Although some of these common servo motor issues can be repaired in-house, we strongly recommend using a dedicated servo motor repair provider such as TigerTek Industrial Services. Our UL-approved, 30,000 sq ft repair facility includes OEM testing equipment, a massive replacement parts inventory, and an in-house machine shop.This insures quality, consistency, and industry-leading turnaround time.
TigerTek is the servo repair partner of choice for clients of all sizes, across the nation. Call us now at 1.877.623.1717 or contact us for a free servo repair quote.
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I wanted to thank you and the TigerTek team for all your efforts this past week-end.
The quick response and "round-the-clock" efforts were very much appreciated and proved yet again that TigerTek can be counted on in an emergency. Please extend my sincere appreciation to all involved. You guys do a Great Job! 
