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“I sent my scale in to Repair Zone but they said it was beyond economical repair. I wanted a second opinion so I had them mail it to the OEM. Surprisingly...
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ZTech Precision
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Servo Motor Repair Standards
Servo Motor Repair Standards
Servo Motor Repair
Remanufacture and Repair process for Servo Motors
Our procedures require that all major electrical and mechanical components making up the servo motor are independently tested upon motor disassembly. You can be assured that your motor will go through the following process:
1. Our technicians run a “Meg test” to check and see if any moisture potentially grounded motor. If moisture has compromised the stator, the motor is disassembled and the windings are washed and baked. Afterwards, the unit is Meg tested again.
Detailed Mechanical Tolerance Check
2. Check the bearings, housing, and end bells for wear and/or damage.
3. Check bearing seats to ensure they are within correct tolerance. Also, we look over the shaft to verify straightness and the condition of the shaft extension. If anything is worn or out of spec we machine it to proper specs.
In-house Machining Center
4. Check connectors, encoder covers, release voltage, and independent torque testing of all brake assemblies.
5. Verify that each feedback device – encoder, resolver, hall sensor, tachometer – is counting/functioning properly. If bad, we either repair or replace the part.
6. Perform a “Back EMF” test; to check the magnetic strength of the rotor.
In-house Winding Department
7. “Surge Test” the stator and do a complete electrical winding evaluation to verify the quality of the winding; if the stator fails we rewind it, in-house. Then we dip it in epoxy resin and bake it to set the finish on the windings.
8. Replace all bearings with high grade shielded bearings for long life and performance.
9. Replace all seals, O-rings, connectors, and any necessary worn or damaged part.
10. Reassemble and align the motor back to manufacture specs.
11. After all necessary repairs are performed; the motor is run tested with a manufacturers drive and complete servo system to simulate your machine, for data (e.g. amp, voltage, RPM). Load testing is optional and performed to match the manufacturer’s torque/speed curve at a minimum of 3 different run speeds.
12. Buff and paint the motor and create new nameplates when needed. Our custom foam packaging system protects the motor in transit and returns to your facility in a ‘new in box’ state.
Watch our video below to see our servo motor repair process.