Here is a Fanuc Alpha i servo motor ready for assembly.
Repair Zone has been seeing an influx of newer generation Fanuc Alpha i Series servo motors and drives coming in for repair. An Aerospace parts manufacturer in California sent us this Fanuc A06B-0265-B102 Alpha i servo motor for evaluation because it was increasingly noisey. In our initial evaluation, all testing showed no major damage to it. This motor will receive a standard reconditioning, which includes new bearings and new seals, full cleaning, feedback alignment, testing, etc. The pictorial below follows Scott, a Fanuc specialist, as he takes us through this repair. If you need a repair of your servo equipment, or have any questions, please call 1(989) 922-0043 for immediate service. To browse our Fanuc inventory, go to www.repairzone.com
Scott begins by testing the resistance to ground, which is done by using a Megger – tested good!
Back EMF test – 46.1 volts, line to line. Tests good!
Removing back end bell and encoder.
Scott visually inspects the encoder and its bearings.
Connected to our software, Scott measures the accuracy of the encoder counting – it was found to be counting correctly and in factory specifications.
Scott is testing to see if thermal on encoder is closed.
The technician is preparing to pull the back end bearing from the rotor.
Servo is fully disassembled.
Surge testing the phases in the stator before and after cleaning. If any of the 3 phases were shorted, it would need to be rewound. In this case, all 3 phases were good as well as the insulation strength.
A pre-wash is sprayed onto the windings and stator. Each servo is washed twice; once to remove heavy contamination and a second time it is placed into a parts washer for more thorough cleaning. It is then baked overnight in our oven.
Removing heavy contaminants via power washing.
Beginning the assembly process.
Applying sealant to keep out moisture and contamination.
Closely inspecting windings, leads, and thermals.
Stator is ready to insert rotor and install new bearings.
Fully assembled and awaiting final run-test.
Scott applied paint and ‘blue-dyes’ the shaft giving it a like new appearance.
Each servo is run-tested twice, once in the beginning and at the end to finish the repair. It’s run data was good and had 6.0 amps, 215.1 volts.
This Fanuc Alpha i AC servo motor is Ready to Ship!
Check our servo motor inventory – we also carry drives, HMI’s, Power Supplies and much more!
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