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How to connect a stepper motor to a bipolar driver

Discussion in 'Microcontrollers, Programming and IoT' started by Emam, Feb 9, 2015.

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  1. Emam


    Jul 7, 2014
    Dear all,
    I have a big problem to connect my stepper motor to a bipolar dirver.

    On the driver I have several inputs including (pulse+, pulse-, direction +, direction -, enable +, enable -) etc.
    And the outputs: motor phase A, and phase B.

    1) my motor has 6 wires. And I have only 4 inputs on my driver!! what should I do with the 2 other wires?
    2) Can you please tell me if I can find a good tutorial to understand these connections?

    Many thanks and bests regards
  2. BobK


    Jan 5, 2010
    Two of the 6 wires will be center taps of 2 others. I.e. there are actually two center-tapped coils. Use an Ohmmeter to determine which wires are which, and then just ignore the center tap wires.

  3. Emam


    Jul 7, 2014
    You can find the schematic of my connections in the file attached.
    I left the common wires open (unconnected).
    This is a summary of the code:

    // ports direction = output
    // all ports =0
    // direction = 1

    while (1)
    enable =1
    wait ()
    wait ()
    enable =0

    This code send continiously pulses (because its in a while loop).
    The wait() is about 100 ms. I changed it several times to see if it can help me to resolve my problem, but it did not.
    This code set the enable to 1 at the begining of each iteration of the while loop. I think I have also tried to set it to 1 during the whole motor movement. but if I am not wrong did not resolve the problem.

    So its a wrong way to do?
    Bests regards

    Attached Files:

  4. Gryd3


    Jun 25, 2014
    Updates from PMs:

    Thank you for the diagrams
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