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Servo 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 load run before it leaves our Chennai bench. We are not a Mitsubishi dealer or service partner; the brand name describes the motor we repair.

Send the nameplateWhatsApp
Mitsubishi AC servo motor nameplate
  • 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.

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.

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
WhatsApp the nameplateSend by email
00Series

Servo motor series we repair

Mitsubishi HG-KR

MR-J4 series. Servo motor repair and load test.

Mitsubishi HG-MR

MR-J4 series. Servo motor repair and load test.

Mitsubishi HG-SR

MR-J4 series. Servo motor repair and load test.

Mitsubishi HG-JR

MR-J4 series. Servo motor repair and load test.

Mitsubishi HG-RR

MR-J4 series. Servo motor repair and load test.

Mitsubishi HG-UR

MR-J4 series. Servo motor repair and load test.

Mitsubishi HG-AK

Servo motor repair and load test.

Mitsubishi HG-KN

MR-JE series. Servo motor repair and load test.

Mitsubishi HG-SN

MR-JE series. Servo motor repair and load test.

Mitsubishi HF-KP

MR-J3 series. Servo motor repair and load test.

Mitsubishi HF-MP

MR-J3 series. Servo motor repair and load test.

Mitsubishi HF-SP

MR-J3 series. Servo motor repair and load test.

Mitsubishi HF-JP

MR-J3 series. Servo motor repair and load test.

Mitsubishi HF-KN

Servo motor repair and load test.

Mitsubishi HC-KFS

MR-J2S series. Servo motor repair and load test.

Mitsubishi HC-MFS

MR-J2S series. Servo motor repair and load test.

Mitsubishi HC-SFS

MR-J2S series. Servo motor repair and load test.

Mitsubishi HC-RFS

MR-J2S series. Servo motor repair and load test.

Mitsubishi HC-UFS

MR-J2S series. Servo motor repair and load test.

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 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 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

05How 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.

  1. Send the nameplate

    WhatsApp a clear photo of the nameplate, the alarm code and what the machine was doing when it failed.

  2. We confirm repairability

    We tell you whether we can test and repair that model before anything is shipped.

  3. Courier or pickup

    Courier the motor to our Chennai bench, or ask us to arrange pickup where needed.

  4. Inspection and quote

    The motor is opened, inspected and photographed. You get the findings and a quote before work starts.

  5. Repair, test, dispatch

    Repaired, run-tested and load-tested, then dispatched with a printed test report.

Mitsubishi servo motor series and models we repair

We repair all frame sizes and ratings in these series, including older and discontinued versions. The list is a guide, not a limit: send us the nameplate. See also AC servo motor repair and all servo motor brands.

HC series

HC-KFS, HC-MFS, HC-SFS, HC-RFS, HC-UFS, HC-LFS

HF series

HF-KP, HF-MP, HF-SP, HF-JP

HG series

HG-KR, HG-MR, HG-SR, HG-JR, HG-RR, HG-UR

Older and special

HA-FF, HA-LFS; TM-RFM direct drive; LM linear servo motors

→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. 1 · Nameplate photoSend it on WhatsApp or the form
  2. 2 · Repairable? QuoteUsually the same working day
  3. 3 · Courier or pickupThe unit reaches our bench
  4. 4 · Bench diagnosisInsulation, windings, brake, encoder
  5. 5 · RepairFailed parts, bearings, seals, brake
  6. 6 · Align and run-testEncoder aligned; no-load and load run
  7. 7 · Report and dispatchPrinted test report with the unit
  8. 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.

Start with step 1WhatsApp the nameplate
06Questions

Mitsubishi servo motor questions

More on the FAQ page.

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 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

Mitsubishi HC, HF and HA motors use OBA13, OSA17, OBA18, OSA104, OSA105 and OSA253 encoders. See Mitsubishi encoder repair.

Example nameplates and feedback devices

Mitsubishi AC servo motor nameplate
Mitsubishi AC servo motor nameplate
Mitsubishi HF-MP servo motor nameplate
Mitsubishi HF-MP servo motor nameplate
Mitsubishi AC servo motor nameplate
Mitsubishi AC servo motor nameplate
05Why Star

One universal test bench for Mitsubishi and 180+ other servo brands

Most repairers test a servo motor on the drive of its own brand, or not at all. Star Automations tests every Mitsubishi servo motor on its Universal Servo Motor Repair Equipment (Mitchell TI-5000JX), India’s first universal servo motor test system. It reads and aligns the feedback device and runs the motor under load without the original drive, so the result is the same whatever the brand.

  • Encoder and feedback read, zero position set and alignment checked before dispatch
  • No-load and load run, with speed and current compared against the nameplate
  • One test report format for every brand, so mixed fleets are easy to compare
  • Motors from machines that mix Mitsubishi with other makes can go in a single consignment

Related pages for Mitsubishi:

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.

Send the nameplateWhatsApp