[Jewelry making - Article 00664] - Re: [Orchid] Foredom repair

[Roger Bowersox]

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    For some reason Orchid has not been posting my answer to the
    Foredome Repair question. So I am sending it to you and others
    directly. Your flexshaft is repairable, new armature, brushes and
    here is how to change armature. 

    1. Remove hand piece. 

    2. Loosen the screw (at base of the gray part that connects the
    motor to flexible shaft) to remove the black flexible shaft cover.
    You do not have to take the sheath all the way off. Watch out for
    all the grease on the cable. 

    3. Remove the gray motor connection. NOTE: The connector has reverse
    threads, turn it clockwise to remove. This will reveal another screw
    at the end of the motor armature that the connects the cable to the
    armature. 

    4. Loosen this screw at the end  of the cable to remove cable from
    motor. 

    5. Remove the motor brushes by removing the two black plastic cap
    screws on the sides of the motor, above the motor hanger bail
    screws. 

    5. Remove the two screws at the motor base near where the motor
    connector was. 

    6. Set the motor on bench upside down and carefully pull up on the
    Lower part of the motor casing. You may have to pry a little with a
    screwdriver to loosen the two halves of the motor. NOTE: There is a
    little round leaf spring at the brushes end of the armature,
    removing the armature with the motor sitting on the bench should
    prevent the loss of the spring. Also look at how the spring sits in
    the motor housing so you can put it back correctly. When looking
    into the motor the leaves point toward you. 

    7. Take the lower half of motor housing with the armature in it and
    tap the end of the armature where the cable attached to it to
    separate armature from housing. This will probably cause a pile of
    graphite motor dust to appear on you and the bench. (Go back to step
    1 and put newspaper under motor while you are working on it.) 

    8. Take the leaf spring out of the upper part of motor and clean the
    dust out of the motor housing parts. I use compressed air. 

    9. Replace the leaf spring. 

    10. Insert new armature into upper part of motor housing. (Remove
    plastic cover from new armature. I had a student try to insert
    armature without doing this.) 

    11. Set lower part of motor housing onto armature. Line up the two
    small tabs where the two halves come together and the screw holes
    should line up. 

    12. Replace the two long screws. Tighten them. 

    13. Replace the motor brushes, preferably new ones. 

    14. Reconnect flexible shaft to armature. 

    15. Replace motor connector, remember reverse threads,
    counterclockwise to tighten. 

    16. Replace flexible shaft cover. 

    17. Reconnect to control and turn on. 

HAVE FUN

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