Power stage rebuild
IGBT modules, gate drivers, and DC bus capacitors replaced on Fanuc servo amplifiers, ABB drives, Yaskawa Sigma, and Kuka KSP / KSD hardware.
Industrial Robot Servo Drive Repair
Independent third-party component-level repair of servo drives and amplifiers on industrial robots: articulated arms, SCARA, and delta robots. Fanuc servo amplifiers, ABB drives, Yaskawa Sigma, and Kuka KSP / KSD coverage.
Where These Drives Sit
Four robot application contexts
Robot servo drives end up at the bench from a wide spread of automation cells. Below are the four common contexts.
01
Welding robots
Spot welding, MIG, TIG, and laser welding cells. Body-shop welding lines on automotive assembly.
02
Material handling
Pick-and-place, machine tending, palletizing, and depalletizing robots in distribution and manufacturing.
03
Assembly & inspection
SCARA and 6-axis assembly robots, vision-guided inspection cells, and electronics-assembly automation.
04
Press tending & foundry
Press-tending robots, die-casting tending, and foundry automation in heavy-duty manufacturing.
What NC Servo Does
Component-level repair on robot drives
Each unit is opened, inspected, and rebuilt at the component level. Failed parts come from inventory or off donor units. Bench verification before ship.
Control board work
Component-level board repair, firmware checks, and feedback-channel verification on encoder interfaces.
Cooling & power supply
Cooling-fan replacement, power-supply rebuild, and thermal-path inspection on cabinet-mounted hardware.
Bench testing
Electronic test setup with dummy load and feedback emulation. Performance check before ship.
Donor parts service
19,000+ unit in-house pool. Aftermarket parts and donor units for legacy robot amplifier hardware.
Repair scope
Hardware repair only. Robot programming, mastering, and cell commissioning stay with the customer or integrator.
Brands
Robot drive brands serviced
Top brands seen on industrial robot drives. Click through for the dedicated brand page.
Common Faults
What usually shows up on robot drives
Robot servo drives run continuous duty in factory cabinets. Failures fall into four categories.
| Power stage | Failed IGBT modules, blown DC bus capacitors, and gate-driver damage. Often follows a power surge or cooling-fan failure on the controller. |
|---|---|
| Cooling & thermal | Cooling-fan failure, heatsink contamination from welding-area smoke, and thermal-stress damage on the power module. |
| Control electronics | Encoder-interface damage, communication-module failure, and capacitor aging on the control board. |
| Cabling and connectors | Damaged feedback cables on the robot dress-pack, encoder connector wear, and contamination on encoder pins. |
Workflow
From part number to ship-back
Same four-step path through the shop whether the drive came off a Fanuc R-2000iC welding cell or an ABB IRB palletizer.
- 01
Get in touch
Call or email with the part number, robot make, and a photo of the nameplate if it helps.
- 02
Bench review
Tech inspects the drive, runs it on the test bench, and confirms what failed.
- 03
Cost & approval
We call back with the cost and a rough turnaround. Nothing is started without your sign-off.
- 04
Repair, test, ship
Failed components replaced from inventory or off donors, drive verified on the bench, and shipped back.
FAQ
Common questions about robot drive repair
Application-specific questions. For brand-specific FAQs, see the dedicated brand page above.
What types of robot servo drives do you repair?
Servo drives and amplifiers from Fanuc (alpha series amplifiers), ABB (IRC5 controller drives, DSQC modules), Yaskawa (Sigma series on Motoman robots), Kuka (KSP / KSD power packs), Allen-Bradley (Kinetix on robot cells), Indramat, Kollmorgen, and Baldor.
What robot makes come through the bench?
Drives come through from Fanuc, ABB, Yaskawa Motoman, Kuka, Kawasaki, Stäubli, Universal Robots, Adept, and Epson SCARA hardware.
Do you provide robot programming, mastering, or cell commissioning?
No. Hardware repair only. Robot programming, mastering, and cell commissioning stay with the customer or integrator. Parameters stored externally must be reloaded after hardware repair.
Can you repair legacy robot drives no longer supported?
Yes. Discontinued Fanuc alpha amplifiers, older ABB DSQC modules, and legacy Yaskawa drives come through routinely. The 19,000+ unit donor pool covers a lot of out-of-support hardware.
Do you provide on-site service?
No. Bench repair is the standard service: ship the drive to Westland, MI for rebuild and testing.
How long does a repair usually take?
Lead time varies job to job, partly because parts are often pulled from donor boards. Give us a call with the part number and the situation.
What is the warranty?
One year on parts and workmanship for repairs and rebuilt units. Standard exclusions apply for power surges, contamination, improper installation, and out-of-spec operation.
More from NC Servo
Related repair coverage
Other industry pages and the brand pages most-tied to industrial robot drives.
Servo drive hub
Full directory of drive brands - Allen-Bradley, Siemens, Indramat, Yaskawa, Fanuc, and more.
CNC drive repair
Servo drives on CNC milling, turning, grinding, and EDM machines.
Packaging drive
Servo drives on packaging-line filling, labeling, and palletizing equipment.
Fanuc brand page
Fanuc servo amplifier coverage on robots and CNC machines.
ABB brand page
ABB IRC5 controller drives and DSQC module coverage.
Yaskawa brand page
Sigma series drives across Motoman robots, packaging, and machine tools.
What is a servo drive?
Plain-language explanation of servo drives: what is inside, common architectures, and what gets done at the bench.
Repair vs replace
When component-level repair makes sense versus buying new or rebuilt.
Robot down? Send a part number
Give us a call or send a part number with the robot make and the symptom. We'll check the donor pool, suggest a rebuilt match if we have one, and walk through repair or cross-brand options if we don't.