Help with 8 wire NEMA 23


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Thread: Help with 8 wire NEMA 23

  1. #1
    Activation process cncneon's Avatar
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    Default Help with 8 wire NEMA 23

    Have a NEMA 23 with 8 wires coming out
    4 pairs of the following
    Black - White with Black stripe
    Red - White with Red Stripe
    Orange - White with Orange stripe
    Yellow - White with yellow stripe
    If you had to guess which way to hook driver polarity would you assume
    solid was positive. What is the downside if I guess wrong?
    Thanks
    cncneon

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  2. #2
    Member john-100's Avatar
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    Default Re: Help with 8 wire NEMA 23

    do you have the data sheet for the motor ???


    if for instance for all the coils
    the solid colour is the start of the winding

    then for parallel connected pairs of coils you need the solid coloured wire from each coil connecting together and the ends with the stripe together
    other wise the magnetic field from one coil will cancel the magnetic field from the second coil
    (when the solid coloured wire from the first coil is connected to the striped wire from the second coil and vice versa )

    when two coils are wired in series
    the start of one coil must be connected to the finish of the other other wise the magnetic fields will cancel again


    its possible that some stepper drivers could be damaged by a load that is resistive instead of inductive
    usually the stepper driver instructions / data sheet will specify both a minimum and maximum inductance for the driver to work

    you could test the motor coils are connected correctly by connecting a single cell battery to the wires from one of the motor phases

    if they are wired correctly , you should find its harder to turn the motor manually

    parallel connected coils wired in phase or series coils, wired in phase the motor
    should turn as easily as it does with no battery
    but be harder with a battery connected

    note -
    the motor when manually turned acts as a generator so you will have a breaking effect if the coils are shorted or connected in anti phase !

    to prove the two coils are the two halves of the same phase


    if you have correctly identified the start of each winding
    when you power one coil at a time the rotor will stay in the same position

    if they are one half of each phase , the rotor will move back and forth one step
    as you alternate the power from one coil and then to the other


    John

    Last edited by john-100; 10-04-2018 at 04:51 PM.


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Help with 8 wire NEMA 23

Help with 8 wire NEMA 23