Emergency: same day
For a line-down motor, where the fault and parts allow. WhatsApp us before you send it so the bench is kept free.
Servo motor repair · Fanuc
Fanuc servo motor repair
Star Automations repairs Fanuc servo motors, including alpha i and beta i series motors on CNC machine tools. The motor is inspected, the failed parts are repaired or replaced, the encoder is aligned where needed, and the motor is proved on our servo motor test system with a no-load run and a load run before it leaves our Chennai bench. We are not a Fanuc dealer or service partner; the brand name describes the motor we repair.
- 25+years of servo repair, since 2000
- 3,000+customers across India
- 100+servo brands covered by our universal servo motor test equipment
- 5sites: Puducherry, Chennai, Bengaluru, Hyderabad, Delhi
- Same dayemergency repair option*
*Where the fault and parts allow. Every repaired unit returns with a printed test report.
Repair turnaround you can plan around
Send a photo of the nameplate first. We confirm whether the motor is repairable, and the quote, the same working day.
Urgent: 3 working days
Repair, encoder alignment and test, counted from the day the motor reaches the bench and the quote is approved.
Standard: 7 working days
Full repair, encoder alignment, run test under load and a printed test report.
- Free repairability check from a nameplate photo
- Printed test report with every motor
- Written warranty, terms stated on every quotation
- Pickup can be arranged; parts that must be imported are quoted with their own timeline
00Series
Servo motor series we repair
Fanuc αiS
alpha iS series. Servo motor repair and load test.
Fanuc αiF
alpha iF series. Servo motor repair and load test.
Fanuc αiSc
alpha iSc series. Servo motor repair and load test.
Fanuc βiS
beta iS series. Servo motor repair and load test.
Fanuc βiSc
beta iSc series. Servo motor repair and load test.
Fanuc α series
older alpha series. Servo motor repair and load test.
01Failures
Common Fanuc servo motor failures
Pulsecoder faults
Communication or position alarms from the Pulsecoder, often after coolant reaches it through a worn shaft seal.
Coolant and oil ingress
Machine-tool coolant gets past the oil seal and into the motor, damaging the encoder and insulation.
Bearing wear
Noise and vibration on axis motors that run long cycles on heavy cuts.
Brake on vertical axes
A Z-axis brake that does not hold lets the axis drift when power is removed.
02Test bench
What the test bench checks
Fanuc motors are run on our servo motor test system without a Fanuc amplifier, so the motor is judged on its own condition before it goes back to the machine.
- Insulation resistance and hi-pot
- Winding resistance and balance
- Encoder or resolver feedback and commutation offset
- Brake release and holding, where fitted
- No-load run, then load run; speed and current against the nameplate
- Vibration and noise at rated speed
03Repair or replace
Repair or replace
Repair makes sense when the motor is an older alpha or beta i frame that is costly or slow to replace, or when coolant damage is limited to the seal, bearings and Pulsecoder.
Replacement is better when the shaft or housing is damaged, the magnets have weakened, or the same motor has failed repeatedly from coolant on a machine that has not been fixed. We tell you which case it is after inspection.
04Next
Before you send it
How the load test works
The test sequence and a sample report.
Load testServo motor repair Chennai
Support and pickup from our Chennai office.
ChennaiFree servo health check
Describe the symptom and get a likely fault class.
Health check05How 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.
→How it works
From nameplate photo to a tested motor in 7 steps
One route for servo motors, encoders and drives. You see the price before any work starts, and the report before the unit leaves our bench.
- 1 · Nameplate photoSend it on WhatsApp or the form
- 2 · Repairable? QuoteUsually the same working day
- 3 · Courier or pickupThe unit reaches our bench
- 4 · Bench diagnosisInsulation, windings, brake, encoder
- 5 · RepairFailed parts, bearings, seals, brake
- 6 · Align and run-testEncoder aligned; no-load and load run
- 7 · Report and dispatchPrinted test report with the unit
- Line down?Servo Swap ships a tested unit first. How Servo Swap works
EmergencySame day*
Urgent3 working days
Standard7 working days
*Where the fault and parts allow. Turnaround counts from when the unit reaches our bench and the quote is approved.
Do you repair Fanuc servo motors?
Yes, including alpha i and beta i series motors on CNC machine tools. Send the nameplate and we confirm before you courier.
Why does coolant keep damaging the Pulsecoder?
Usually a worn front oil seal or coolant spraying directly on the motor. We replace the seal and note the root cause on the report.
What should I send for a quote on a Fanuc motor?
A photo of the nameplate, the alarm code and a note on the symptom. We confirm repairability before you courier.
Do you need a Fanuc drive to test the motor?
No. Our servo motor test system runs Fanuc motors without the original drive, then a load rig applies load.
Is there a warranty?
A written warranty is given after a successful repair. Warranty terms are stated on each quotation.
Encoders and feedback on these motors
Fanuc motors use serial Pulsecoders: α A64, αi A64i, αi A1000, β A32B and βi A128i among others. See Fanuc Pulsecoder repair.
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.