Repair servo motors
Fanuc αi / βi
αiS · αiF · αiCONS · βiS · βiSc · A06B servo motors
A Fanuc servo motor failure stops CNC machine tools or production lines. We repair all Fanuc servo motor series — bearings, absolute αi encoders, windings, brakes. Quote 24h.
Diagnostics included in repair
No-obligation quote
12-month warranty
Courier pickup from all of Europe
Load testing
Fanuc servo motor service — repair scope
Precision bearing replacement
Replacement of motor ball and roller bearings (front/rear bearing). Class P5/P4 bearings for servo motors — run-out and friction torque check after assembly.
αi absolute encoder repair
Diagnostics and repair of absolute encoder electronics A860-2000 (αiS) and A860-2020 (βiS). Replacement of the optical head, regeneration of A/D modules. Absolute calibration after replacement.
Winding regeneration
Stator winding insulation diagnosis — insulation resistance (IR test) and dry run measurement. Regeneration or rewinding of damaged phase windings. Impregnation after repair.
Brake and seal service
Repair and calibration of the parking brake (electromagnetic brake). Replacement of shaft seals (oil seal / lip seal). Restoration of IP65 rating after repair.
αiS spindle motor repair
Service of αiS spindle motors (spindle motor): high speed up to 15,000/30,000 rpm. Ceramic bearings, dynamic rotor balancing after repair.
Post-repair tests and verification
Every repaired Fanuc motor undergoes dynamic tests: winding temperature measurement, encoder parameter verification, brake test. Test protocol attached to the device.
Report Fanuc servo motor fault — no-obligation quote
Provide the Fanuc motor model (A06B-…) and fault description or CNC alarm. An EFIXLAB specialist will contact you with a diagnosis and quote.
Dziękujemy! Our specialist will contact you shortly.Frequently asked questions — servo motors Fanuc
SV-0358 (encoder battery error) or SV-0466 (encoder communication error) are typical αi absolute encoder errors. The cause may be a discharged battery, damaged cable or damaged encoder electronics. Diagnostics identifies the exact cause.
Most commonly yes — noisy, crunching or vibrating servo motor operation is a symptom of damaged bearings. Dust accumulation or lack of lubrication is also possible. Test bench diagnosis confirms the cause.
Bearing replacement: 250–500 PLN. Encoder repair: 300–700 PLN. Winding regeneration: 450–1000 PLN. Quote after diagnostics — diagnostics cost included in repair.
Fanuc Servo Motor Repair — Alpha, Beta, and AC Servo Motors
Fanuc servo motors — Alpha series (aiF, aiS, aiCZ), Beta series (iS, iL), and legacy AC servo motors — drive the axes and spindles of CNC machine tools and robots worldwide. These motors combine precision winding construction, integral encoders (Alpha iA series with built-in serial encoders), and optimized magnetic design for high-dynamic axis motion. Fanuc motor failures directly impact machine tool and robot performance, making rapid, quality repair essential for manufacturing continuity.
Common Fanuc servo motor failures include encoder and pulse coder failures (the most frequent issue — causing position errors, alarm codes, or complete axis loss), winding insulation breakdown from thermal stress or contamination, bearing wear causing vibration and noise, brake unit failures in gravity-loaded axes, and connector/cable damage. Alpha iA motors with integrated serial encoders are particularly sensitive to encoder head contamination, while older pulse coder motors may develop capacitor aging in the encoder electronics.
EFIXLAB provides Fanuc servo motor repair including both mechanical and electronic restoration. Our service covers encoder/pulse coder diagnostics and replacement, winding testing and repair, bearing replacement with high-precision equivalents, brake unit overhaul, connector restoration, and complete motor testing. We verify encoder signal quality, winding insulation resistance, brake holding torque, and overall motor performance on our test bench.
Fanuc servo motor repair typically saves 40–65% versus new motor cost — savings that are significant given Fanuc premium pricing. Encoder/pulse coder replacement alone can save thousands compared to complete motor replacement when the motor itself is still good. For legacy Fanuc motors no longer manufactured, repair is the only option. All motor repairs include comprehensive testing and our 12-month warranty.