The control pins of the stepper motor driver of A3977


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Thread: The control pins of the stepper motor driver of A3977

  1. #1
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    Default The control pins of the stepper motor driver of A3977

    Hi,
    The attached pictures shown a stepper motor driver of A3977 driver from an old mini CNC machine, which used 5 pins for the control.
    Need help on the pinout of this board, for repair or replacement.
    Thanks
    Adam

    https://www.cnczone.com/forums/attac...d=462546&stc=1https://www.cnczone.com/forums/attac...d=462548&stc=1

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    Attached Thumbnails Attached Thumbnails The control pins of the stepper motor driver of A3977-a3977-board-front-png   The control pins of the stepper motor driver of A3977-a3977-board-back-jpg  


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    Default Re: The control pins of the stepper motor driver of A3977

    For the control connection.
    The left pin ( closest to the center of the board of you first picture ) is the +5V connection for all three inputs
    the next one is CLK or PULL ( active low )
    the third one is DIR ( active low )
    For the ENable ( active low ) I am not sure if it's connected to pin four or pin 5. It looks to me pin 5 You can check that with a ohm meter between the pin and the hole just above.



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The control pins of the stepper motor driver of A3977

The control pins of the stepper motor driver of A3977

The control pins of the stepper motor driver of A3977