Component-Level Arm Mechanical Overhaul
Rebuilding worn harmonic reducers, bearings, belts, and seals restores arm motion without paying for complete new OEM assemblies.
GK-SEMI · Semiconductor Equipment Robot Arm & Loader Arm Repair
Semiconductor Equipment Robot Arm & Transfer Arm Repair
We specialize in repairing robot arms, wafer transfer arms, and pick-and-place handling arms used in semiconductor packaging, assembly, and wafer-processing equipment.
Services focus on mechanical arm overhaul, harmonic drive gear sets, precision bearings, timing belts, servo motors, encoders, and end effectors. We repair wafer loader/unloader arms on ASM and K&S packaging tools, as well as atmospheric and vacuum wafer transfer arms from Brooks, Rorze, and Yaskawa.
Send the arm label, parent equipment model, and fault alarm to start a 24-hour remote review.
Station Teaching Datum & Dynamic Testing
Arm levelness, Z-axis perpendicularity, zero-point repeatability, and multi-hour cycle tests verified on our diagnostic bench.
Parts Support for Obsolete Equipment Arms
Rebuilds and replacement parts for legacy ASM, K&S, BESI, DISCO, and wafer transfer arms with long OEM lead times.
What We Repair
Equipment Robot Arms, Loader Arms & Handling Mechanisms
Dedicated repair service for removable robot arms, transfer linkages, and precision handling assemblies installed on semiconductor front-end and back-end manufacturing equipment.
Wafer Loader & Unloader Arms (ASM, K&S, DISCO)
Overhaul of cassette transfer arms, leadframe indexer arms, wafer elevator arms, and magazine push/pull mechanisms on packaging and dicing tools.
Wafer Transfer Arms (SCARA & Frog-Leg Linkages)
Mechanical rebuilding for atmospheric EFEM transfer arms and vacuum cluster chamber arms, addressing joint looseness, belt wear, and droop.
Arm Joints, Harmonic Reducers & Drives
Precision replacement of harmonic drive gear sets, cross-roller bearings, ferrofluidic rotary seals, ball screws, and timing belt tensioners.
Arm End Effectors, Paddles & Grippers
Refurbishment of ceramic/PEEK wafer handling blades, Bernoulli wands, die pick-and-place swing collets, vacuum lines, and presence sensors.
Arm Homing Failure
Placement Offset / Position Drift
Arm Axis Vibration & Backlash
Wafer / Die Pickup Fault
Loader Arm Jamming
Arm Joint Belt Slipping
Arm Rotary Seal Vacuum Leak
Encoder Signal Error
Common Semiconductor Robot Arm Faults We Resolve
COVERING PACKAGING HANDLER ARMS (ASM / K&S) & WAFER TRANSFER ARMS| Reported Equipment Symptom / Alarm | Affected Arm Assembly / Mechanism | Typical Root Cause | Standard GK-SEMI Repair Action |
|---|---|---|---|
| Wafer Loader Arm Homing Failure / Axis Alarm | ASM / K&S Cassette Loader & Indexer Arm | Optical home sensor fault, encoder degradation, or timing belt tooth wear | Replace optical encoder or sensor, rebuild timing belt drive, and re-establish arm zero datum |
| Pick & Place Swing Arm Placement Offset / Jitter | ASM AD838 / K&S Die Attach & Bond Arm | Precision joint bearing play, linear/rotary actuator coil fatigue, or loose clamp | Rebuild precision bearing pivots, re-tension drive linkages, and calibrate dynamic placement repeatability |
| Transfer Arm End-Effector Droop / Station Misalignment | SCARA & Frog-Leg Wafer Transfer Arm (R/Theta) | Harmonic reducer gear wear, internal arm belt stretch, or pivot bearing backlash | Replace harmonic drive gear set, install new tensioned steel/timing belts, and verify arm levelness |
| Wafer Drop, Vacuum Pressure Loss, or Blade Chattering | Ceramic / Quartz Wafer Blade & Vacuum Wand | Worn vacuum seal pads, micro-cracks in blade, or clogged pneumatic tubing inside arm | Reseal pneumatic channels, replace vacuum suction pads, inspect blade coplanarity, and flow-test |
Supported Arm Brands & Equipment Platforms
Semiconductor Equipment Robot Arm Models We Service
We repair robot arms and handling linkages across semiconductor packaging equipment (ASM, K&S, BESI, DISCO) and wafer transfer systems (Brooks, Rorze, Yaskawa, Daihen, Kawasaki, JEL).
Die Bonder & Wire Bonder Handling Arms
Quote ASM Arm Repair
ASM (ASMPT) Robot Arms
Wire Bonding & Packaging Handler Arms
Quote K&S Arm Repair
K&S (Kulicke & Soffa) Robot Arms
Advanced Packaging & Dicing Arms
Quote BESI / DISCO Arm Repair
BESI, DISCO & ESEC Arms
Vacuum & Atmospheric Transfer Arms
Quote Brooks Arm Repair
Brooks Automation Transfer Arms
EFEM & Sorter Dual-Arm Systems
Quote Rorze / Yaskawa Arm Repair
Rorze & Yaskawa Wafer Arms
Thermal, Track & Cleanroom Arms
Quote Wafer Handler Arm Repair
Daihen, Kawasaki, JEL & Sankyo
Need service for a specific arm part number? Send a photo of the nameplate on the arm body or joint housing for direct cross-referencing and technical review.
Why GK-SEMI
Semiconductor robot arm repair backed by mechanical and servo expertise.
When an equipment arm faults, replacing the entire assembly is costly and lead times can be months. We overhaul the mechanical arm at the component level—replacing worn harmonic reducers, bearings, belts, and seals while restoring precision servo alignment.
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Arm mechanical rebuild and servo tuning together
Arm pivot bearings, harmonic drives, drive belts, servo motors, and encoders are evaluated as a complete motion system.
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Bench testing matched to arm configuration
Joint backlash, stroke limits, homing repeatability, and vacuum suction are verified on specialized arm test fixtures.
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Repair + spare parts + replacement arm backup
For obsolete arms or severely damaged castings, our secondary-market inventory provides tested replacement sub-assemblies.
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Clear repair scope, turnaround schedule, and warranty
Every quotation details the exact mechanical parts replaced, calibration standards, lead time, and warranty terms upfront.
Standard 5-Step Semiconductor Equipment Robot Arm Repair Workflow
STEP 01
Remote Arm Review
Review nameplate photos, arm part numbers, and alarm codes to confirm mechanical and electrical fault scope.
STEP 02
Bench Teardown & Quote
Measure arm joint backlash, bearing play, belt wear, and encoder feedback to provide an itemized fixed quote.
STEP 03
Component-Level Overhaul
Replace worn harmonic gear sets, cross-roller bearings, timing belts, vacuum seals, and servo feedback sensors.
STEP 04
Arm Datum Calibration
Re-establish mechanical home zero, verify arm coplanarity and blade levelness, and run continuous cycle tests.
STEP 05
Video Sign-Off & Return
Provide test video of smooth arm motion, inspection checklist, and warranty documentation before clean packaging.
Testing & Repair Documentation
The repaired arm. The work completed. The test evidence.
Arm repair verification is agreed around the reported equipment alarm and the exact wafer transfer or bonding motion required.
Repair Work Tied to Your Exact Serial Arm
The equipment model, arm part number, hardware revision, and reported alarm identify the unit being serviced. Records document every bearing, gear, belt, or seal replaced.
Functional Checks for the Repaired Arm
Applicable bench checks cover smooth extension/retraction, repeatable homing, joint backlash elimination, vacuum suction hold, and multi-axis cycle motion.
Test Evidence for Your Engineering Team
Review arm test results, calibration checklists, and motion videos for return approval, with clear instructions for final on-tool station re-teaching.
Incoming Arm Teardown Report
Details joint wear measurements, harmonic gear backlash, belt stretch, and encoder signal integrity confirmed against your reported alarm.
Arm Alignment & Datum Check
Documents arm levelness, blade coplanarity, home zero offset values, joint backlash tolerance, and vacuum leak decay rate.
Arm Cycle Test Video
Provides video evidence of smooth, vibration-free arm extension, retraction, and pick-and-place cycling on our test fixture prior to return shipping.
Completed Repair Projects
Semiconductor equipment arm repairs in practice.
Representative service projects across ASM die/wire bonder loader arms, K&S packaging handler arms, and wafer transfer arms.
ASM Packaging Equipment · AD838 / Eagle / MS90 Series
Quote a Similar ASM Arm Repair
ASM Wafer Loader Arm & Pick-and-Place Arm Overhaul
Reported Fault
Wafer loader arm homing failure, pick-and-place swing arm vibration, and recurring positioning offset alarm.
Completed Work
Replaced precision arm pivot bearings and timing belts, rebuilt linear/rotary encoder feedback, and recalibrated home zero reference.
Verification Result
Restored smooth, high-speed arm swing motion and repeatable die pick-and-place cycling under bench endurance testing.
K&S Equipment · ICONN / Maxum Plus / 8028PPS Series
Quote a Similar K&S Arm Repair
K&S Material Handling Arm & Indexer Linkage Repair
Reported Fault
Magazine loader arm jamming, indexer arm position drift, and servo following error alarm during substrate feed.
Completed Work
Overhauled arm linear guideways, replaced worn drive belts and leadframe clamper bearings, and tuned servo motor feedback.
Verification Result
Eliminated mechanical binding and verified continuous, jam-free leadframe transfer cycling under load.
Wafer Transfer Arms · Brooks / Rorze / DISCO / Yaskawa
Quote a Similar Transfer Arm Fault
Wafer Transfer Arm, Harmonic Reducer & Joint Rebuild
Reported Fault
R/Theta arm extension offset during cassette transfer, joint backlash, and ceramic blade vacuum grip drop.
Completed Work
Replaced harmonic drive gear set, installed new joint bearings and vacuum seals, re-tensioned internal belts, and resealed ceramic blade lines.
Verification Result
Passed vacuum decay test and multi-hour continuous transfer cycle run with zero position drift.
Have a similar semiconductor equipment arm fault?
Send your arm part number, parent machine model, and alarm record for a rapid repair assessment.
Common Questions
Before you send the robot arm.
Get the arm repair scope, remote fault review, and return arrangements clear from the start.
Which semiconductor equipment robot arms do you repair?
We repair robot arms and handling linkages across semiconductor packaging equipment—including ASM (ASMPT AD838, AD830, Eagle, AB339, AMICRA, MS90), K&S (Kulicke & Soffa ICONN, Maxum Plus, ConnX, 8028PPS, APAMA), BESI, and DISCO—as well as wafer transfer arms from Brooks Automation, Rorze, Yaskawa, Daihen, Kawasaki, JEL, and Sankyo.
Do we need to ship the complete machine, or just the robot arm?
You only need to ship the removable robot arm or handling assembly! Tell us whether you have a wafer loader arm, swing pick-and-place arm, transfer linkage, or harmonic drive module. Our technical team confirms what cables or accessories are needed for bench testing before you ship.
Can you review the arm fault and quote before receiving the unit?
Yes. Send the arm part number, nameplate photo, parent equipment model, alarm code, and a short video of the movement. Our two-shift online support team provides an initial fault review and estimated repair range before you ship.
Our machine is down. Can you handle urgent arm repairs or provide replacement arms?
State the production stoppage and target return date in your enquiry. We review priority rush scheduling against component availability—and if repair is not fast enough, we can check our secondary-market inventory for compatible replacement arms or assemblies.
What functional testing and warranty are included with the arm repair?
Every quotation specifies the bench tests, backlash measurements, stroke repeatability checks, video documentation, and warranty terms for that job. Any re-teaching or fine alignment needed after remounting the arm onto your machine is also clearly explained.
Can you also supply replacement parts for obsolete semiconductor arms?
Yes. When an older arm has damaged castings or obsolete internal gears with no OEM support, our secondary-market network and precision machining resources can source or manufacture compatible replacement parts.
Request a Robot Arm Repair Quote
Send the label.
Send the label.
Tell us what has failed.
Contact GK-SEMI for semiconductor equipment robot arm, wafer loader arm, and transfer linkage repair. Include your required return date if the machine is stopped.
- Robot arm / assembly manufacturer, model, and part number
- Parent machine model (e.g., ASM AD838, K&S ICONN, Brooks MAG7, Rorze)
- Fault symptoms, alarm code, screenshot, or movement video
- Current factory location and required return date
WHATSAPP · GK-SEMI
+86 134 8091 2606
Semiconductor
Robot Arm Repair Get a Repair Quote ↗
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