Repairing and Rewinding AC Servo Motors

You can disasemble the serco carefully, count the number of turns while you remove the windings and write them down. check the wire diameter, brush angle, winding tension, commutator and wire stecking method, insulation on the winding, number of poles.

Don't forget carefully marking (pin-punches help) alignments of everything movable, and photographs as you disassemble... not to mention the DIRECTION of windings around each pole-piece. I worked in a rewind shop for a number of years, and at one point thought I'd seen everything...(yeah, right!) Along came a unit with a "hollow" fiberglass rotor... windings encased in the 'glass, and NO IRON! There are some unique approaches being taken, nowadays. If you plan to stay IN the business for long, do some research. Start with, maybe: http://www.amazon.com/Electrical-Machines-Drives-Third-Hindmarsh/dp/0750627247 (I have the 1st edition, still)

Best Wishes ~