What they do:
Servo motors are variable position electrical motors. It controls the action of the mechanical device in a servomechanism.

Primary Types and How They Work:
Industrial servo motors range in both size and type. For example, motors can be constructed for either AC or DC power sources, designed with a variety of base RPM and max RPM speeds. DC motors typically have tachometer feedback control, whereas AC motors will typically be coupled with an encoder for precise control. They can be used to position ball screws, as well as a variety of geared devices.

• Hypot and Megohm test the windings for shorts to ground during run-in and run-out.
• Verify magnet strength and shorts between phases with back EMF testing.
• Recondition or rewind windings.
• Replace bearings and seals when needed.
• Replace machine pilot, shaft and mounting area if needed.
• Replace any damaged connections.
• Verify encoder operation with custom software design to check optics, processor and communication signals.
• Run on a system drive and paint to specs.