Welcome to Our Community

Some features disabled for guests. Register Today.

Slaved Motor Lags Behind Master

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

  1. Adam Blencowe

    Builder

    Joined:
    May 13, 2015
    Messages:
    2
    Likes Received:
    0
    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
    Builder

    Joined:
    Jul 13, 2014
    Messages:
    404
    Likes Received:
    144
    Adam, are the cables to the stepper motors the same length?
     
  3. Adam Blencowe

    Builder

    Joined:
    May 13, 2015
    Messages:
    2
    Likes Received:
    0
    Just checked and the lagging stepper's cable is approximately 200mm longer.
     
  4. Paruk

    Paruk Master
    Builder

    Joined:
    Jul 13, 2014
    Messages:
    404
    Likes Received:
    144
    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

    Joined:
    Aug 6, 2013
    Messages:
    753
    Likes Received:
    345
    it is almost certainly a software problem, but you don't say what software you are using, nor what controller.
     

Share This Page