Reverse engineering a servo motor

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i've got servo motor took off old printer , i've hit wall on figuring out 3 brown wires in picture do. i've got kind of optical rotation sensor on back, wire emitter, sensor(s)?

i've tried measuring resistance of each of 3 wires black or white, each of other brown wires.... nothing.

i tried manually spinning motor , having each of brown wires hooked analog inputs... still nothing.

i'm hoping community can recommend how can figure out 3 brown wires do.

i'll mention i'm pretty new things arduino , electrical stuff isn't forte, that's why i'm trying in first place.  :)

that brushed d.c. motor optical shaft encoder.

the encoder has 1 or more leds , phototransistors, take fair bit of knowledge semiconductor electronics figure out connections , how use them.

unfortunately such circuits can rather destroyed applying power, if polarity wrong. if want use motor/encoder, better off buying 1 documentation.


Arduino Forum > Using Arduino > Motors, Mechanics, and Power (Moderator: fabioc84) > Reverse engineering a servo motor


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