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My CNC Circles, are not round anymore...

Discussion in 'OpenBuilds Forum Help' started by canonman, Feb 29, 2020.

  1. canonman

    canonman New
    Builder

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    Hi, HOpe you guys can help
    My CNC circle cuts are no longer fully round can anymore ? both left and right sides, have a straight bit along the edge. !!
    Can anyone advice how to solve this
    Thanks
     
  2. Rick 2.0

    Rick 2.0 OpenBuilds Team
    Staff Member Moderator Builder Resident Builder

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    Check for a loose pulley on a belted system or a loose flex coupling on a screw system.
     
  3. canonman

    canonman New
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    thanks for your help
    will have a look
     
  4. canonman

    canonman New
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    Rick...big thank you m8
    z pully was faulty, very loose, the grub screw heads are shot, will need to get fresh ones, but having trouble getting them out..
    Thanks for your time.
     
    Peter Van Der Walt likes this.
  5. Giarc

    Giarc Master
    Moderator Builder

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    I would suggest not using grub screws but substitute longer screws of the right diameter (see picture). If you strip the socket then you can still grab and turn them with a pliers.
    upload_2020-3-18_18-53-13.png
     
    Peter Van Der Walt likes this.
  6. canonman

    canonman New
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    Giarc Thank you.. its the old saying....great minds....
    I bought longer stanard phillips screws and cut them down just enough to ensure they dont foul anything, and they are much easier to adjust etc.
    As you said, I also have the advantage of being able to grip them if it happens again.
    Thank you. Keep on CNCing...
     

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