Fanuc servo motor repair
Common failures, what the test checks, repair or replace.
FanucServo motor repair
Servo motor repair and refurbishment
Servo motor repair at Star Automations means the motor is opened, every failed part is found and fixed, the encoder is realigned where needed, and the motor is proved on a no-load run and a full-load test before dispatch. Bearings, seals, brakes, encoders, connectors and winding faults are all handled in-house at our Chennai bench and Puducherry headquarters, for multi-brand AC servo motors.
01What is included
What a servo motor repair covers
The scope depends on what we find at inspection. You see the findings and the quote before work starts, so nothing is replaced without a reason.
- Inward inspection with photos and the serial number logged
- Bearings and oil seals replaced, shaft and keyway checked
- Brake checked for release voltage and holding; brake parts serviced
- Encoder or resolver repaired or replaced, then aligned to the rotor
- Winding insulation, resistance and balance tested; winding faults repaired
- Connectors and feedback cables cleaned, repaired or replaced
02Failure modes
How servo motors fail
Encoder faults
Serial communication errors, position loss and alarms at power-up. Often caused by coolant or oil reaching the encoder through a worn seal.
Bearing wear
Noise, vibration and heat at the drive end. Left too long, a bearing failure can damage the encoder and the shaft.
Brake problems
A brake that does not release overheats the motor; one that does not hold lets a vertical axis drop.
Winding and insulation
Overcurrent or ground-fault trips. Insulation tests show whether the winding can be saved.
03Verification
How the repair is proved
Every repaired motor goes through the same test sequence on our servo motor test system: electrical checks, feedback and commutation, brake, a no-load run, and then a full-load run on a custom-built load rig. Measured speed and current are compared with the nameplate, and vibration and noise are checked at rated speed.
The results go on a printed test report that travels with the motor. See how the load test works and a sample test report.
Repair is not always the right answer. If the frame is damaged, the magnets are weak or the encoder cannot be sourced, we tell you and suggest a stock motor or an upgrade instead.
04Brands
Repair by brand
Yaskawa servo motor repair
Common failures, what the test checks, repair or replace.
YaskawaSiemens servo motor repair
Common failures, what the test checks, repair or replace.
SiemensMitsubishi servo motor repair
Common failures, what the test checks, repair or replace.
MitsubishiAllen-Bradley servo motor repair
Common failures, what the test checks, repair or replace.
Allen-BradleyABB servo motor repair
Common failures, what the test checks, repair or replace.
ABBB&R servo motor repair
Common failures, what the test checks, repair or replace.
B&R05How to send
How to send the motor
You can send a servo motor from anywhere in India. Talk to us before you courier, so the unit is expected and logged on arrival.
Send the nameplate
WhatsApp a clear photo of the nameplate, the alarm code and what the machine was doing when it failed.
We confirm repairability
We tell you whether we can test and repair that model before anything is shipped.
Courier or pickup
Courier the motor to our Chennai bench, or ask us to arrange pickup where needed.
Inspection and quote
The motor is opened, inspected and photographed. You get the findings and a quote before work starts.
Repair, test, dispatch
Repaired, run-tested and load-tested, then dispatched with a printed test report.
Do you repair the motor or swap it for another?
Your own motor is repaired and returned, with its serial number traced from inward to dispatch.
Can you repair a motor that was repaired elsewhere and now loses position?
Usually, yes. Position loss after winding or encoder work is often a commutation offset problem. We realign the encoder and prove it on the test system.
What decides repair or replace?
Frame and shaft condition, magnet strength, whether the encoder can be sourced, and how the repair cost compares with a new or stock motor and its lead time.
Is there a warranty?
A written warranty is given after a successful repair. Warranty terms are stated on each quotation.
What do I need to send for a quote?
A photo of the nameplate, the alarm code, and a short note on the symptom: noise, heat, position loss or brake trouble.
Send the nameplate. We confirm repairability before you courier.
WhatsApp a nameplate photo and the alarm code to +91 97866 22233, or email info@starautomations.com.