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Thread: Wrong cut

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  1. #11
    What are your steps per mm settings for x and y axis ?

  2. #12
    I checked this at the beginning and it was fine...320 steps/ mm, 1600 micro steps on the stepper drive, 5mm / rev on the ballscrew.The same settings for all axis

  3. #13
    Quote Originally Posted by cncnescu View Post
    Yes, it will return to the position, so it's not the noise.
    So this also rules out reversed polarity problems... right?


    If you are convinced the total combined rigidity/flex cant be the problem....


    You can try with a 6mm cutter with a lot less flex..



    Grtz Bert.



    Verstuurd vanaf mijn SM-A320FL met Tapatalk

  4. #14
    Today I discovered that my VDF was set on CCW rotation and the cutter used for MDF was a right hand one. After changing to CW on MDF I get the right dimension.
    However on the wood plate on a 40x40 square it's all perfect, but when I switched to a bigger 80x80 square I get again wrong dimensions 80x79.8.
    Normally it should work also on a bigger square but at least half of the issue was solved.
    Last edited by cncnescu; 23-09-2018 at 12:09 PM.

  5. #15
    Quote Originally Posted by cncnescu View Post
    Today I discovered that my VDF was set on CCW rotation and the cutter used for MDF was a right hand one. After changing to CW on MDF I get the right dimension.
    However on the wood plate on a 40x40 square it's all perfect, but when I switched to a bigger 80x80 square I get again wrong dimensions 80x79.8.
    Normally it should work also on a bigger square but at least half of the issue was solved.
    It isn't hitting soft limits and closing down on that axis?

    Sent from my F8331 using Tapatalk

  6. #16
    With such a basic error as running your spindle backwards I suggest you run through all your settings and calculations again and check X, Y and Z travel in several areas with a dial guage to ensure your calibration and and other assumptions are correct.
    You think that's too expensive? You're not a Model Engineer are you? :D

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