How the load test works
The test sequence and a sample report.
Load testServo motor repair · Mitsubishi
Mitsubishi servo motor repair
Star Automations repairs Mitsubishi servo motors, including HF, HG and HC series motors used with MELSERVO MR-J drives. 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 full-load test before it leaves our Chennai bench. We are not a Mitsubishi dealer or service partner; the brand name describes the motor we repair.
01Failures
Common Mitsubishi servo motor failures
Encoder communication alarms
Encoder errors on HF and HG motors, often from a damaged cable or contamination at the connector.
Bearing wear
Noise on small motors that run fast, short cycles on assembly and packaging machines.
Brake not releasing
A brake that drags heats the motor and trips the drive on overload.
Shaft and coupling damage
Crashes and misalignment damage shafts and front bearings.
02Test bench
What the test bench checks
Mitsubishi motors are run on our servo motor test system without an MR-J amplifier, then put under full load on the rig.
- 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 full-load run; speed and current against the nameplate
- Vibration and noise at rated speed
03Repair or replace
Repair or replace
Repair suits HF, HG and HC motors with encoder, bearing, brake or connector faults, especially older frames where a direct replacement means changing the amplifier too.
Replacement suits motors with a bent shaft, cracked housing or weak magnets. We tell you after inspection, with photos.
04Next
Before you send it
Servo 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.
Do you repair Mitsubishi servo motors?
Yes, including HF, HG and HC series motors used with MELSERVO MR-J drives. Send the nameplate and we confirm before you courier.
Can you repair older HC and HA motors?
Often, yes. Older frames are where repair saves the most, because replacement may mean changing the amplifier too.
What should I send for a quote on a Mitsubishi 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 Mitsubishi drive to test the motor?
No. Our servo motor test system runs Mitsubishi motors without the original drive, then a load rig applies full load.
Is there a warranty?
A written warranty is given after a successful repair. Warranty terms are stated on each quotation.
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.