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Slaved Motor Lags Behind Master

Discussion in 'Motors' started by Adam Blencowe, Jul 28, 2015.

  1. Adam Blencowe

    Builder

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    Hi,

    I need a bit of help. I have recently built an OX CNC at 1500mm by 1500mm. It works really well for what I am using it for except for one small problem I don't know how to resolve.

    The Y-axis which uses two Nema 34 motors (one Y and one mirrored - A), and it seems to have an issue with the steppers starting there movement at the same time. It appears like the Y motor moves a few milliseconds before the A motor.

    A friend helped me configure the driver, I have tuned the motors. I am not sure if its a hardware issue or software. If anyone has any thoughts on how I might go about teasing this problem out it would be massively appreciated.

    Thanks,

    Adam
     
  2. Paruk

    Paruk Master
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    Adam, are the cables to the stepper motors the same length?
     
  3. Adam Blencowe

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    Just checked and the lagging stepper's cable is approximately 200mm longer.
     
  4. Paruk

    Paruk Master
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    That might be the problem, make them the same length to eliminate that one. Than check if it works ok. Good luck!;)
     
  5. David the swarfer

    David the swarfer OpenBuilds Team
    Staff Member Moderator Builder

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    it is almost certainly a software problem, but you don't say what software you are using, nor what controller.
     

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