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Thread: A axis

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  1. #1
    Join Date
    Sep 2019
    Posts
    54

    A axis

    Hi all
    I think I have a problem with my breakout board
    It's a HG08 from cnc4you
    X and Z axis working fine
    But Y axis moves only one direction when using keyboard or when I hit tab and click on arrow direction using mouse,
    I have checked all wiring,
    Have checked all pins on serial cable,
    Have swapped out serial cable for new one, but no difference,

    But the HG08 board has a A axis output,
    So I plugged my Y driver into the A axis on breakout board,
    In pin and ports, motor outputs
    I changed my Y axis step pin and dir pin to the
    A axis,
    Resigned my A axis hotkeys to where my Y axis hotkeys was

    And it works fine now jogging it around the table,

    But when I run a program Mach still thinks
    the original Y axis is controlling the Y movement
    But it's not,
    So is there any way I can change Machs Y axis to run the A axis permanently,

    Badly stuck I could buy a new breakout board

  2. #2
    Join Date
    Apr 2004
    Posts
    5731

    Re: A axis

    When you changed the pin assignments of the Y axis to those of the A axis, did you also change the A axis pins to those of the former Y axis? If not, it may be confused as to which is what. Usually, axes that run in only one direction have a wire loose somewhere; you might try remaking all the connections to your Y axis motors and logic pins.
    Andrew Werby
    Website

  3. #3
    Join Date
    Sep 2019
    Posts
    54
    Yep I have done that with the A pins

    When I swap X and Y outputs from the breakout board to the drivers, the problem ends up on the X axis, so I don't think there is any issue on that side,
    Which makes me think it's a problem around the breakout board
    Regards
    Quote Originally Posted by awerby View Post
    When you changed the pin assignments of the Y axis to those of the A axis, did you also change the A axis pins to those of the former Y axis? If not, it may be confused as to which is what. Usually, axes that run in only one direction have a wire loose somewhere; you might try remaking all the connections to your Y axis motors and logic pins.

  4. #4
    Join Date
    Sep 2019
    Posts
    54
    I wonder can I change the pins coming out of the pc,
    Just so I could rule out any problem with the parallel port,
    As I am not using any of the other pins on the port
    ie, limits


    Quote Originally Posted by Dem1 View Post
    Yep I have done that with the A pins

    When I swap X and Y outputs from the breakout board to the drivers, the problem ends up on the X axis, so I don't think there is any issue on that side,
    Which makes me think it's a problem around the breakout board
    Regards

  5. #5
    Join Date
    Sep 2019
    Posts
    54
    Hi
    Just found a solution,
    Just had to slave the A axis to the Y axis, so that should be all good now
    Quote Originally Posted by Dem1 View Post
    I wonder can I change the pins coming out of the pc,
    Just so I could rule out any problem with the parallel port,
    As I am not using any of the other pins on the port
    ie, limits

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