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Ooznest OX not cutting circles

Discussion in 'CNC Mills/Routers' started by gareth harvey, May 24, 2017.

  1. gareth harvey

    gareth harvey Well-Known
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    Have been trying to cut circles on the OX but they all just keep cutting with 'flat' sides. Have reduced the travel speed of x & y axis but nothing changes. This one was 200mm across, used Sketchup to draw.

    Even bigger circles are exactly the same, all have flat sides
     

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  2. Ryan Lock

    Ryan Lock Master
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    I would check the grub screws on your pulleys are tight, this is usually what you see when they are not tight enough.
     
  3. gareth harvey

    gareth harvey Well-Known
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    Will check now, how tight do these need to be, can I 'really pull them'?
     
  4. JustinTime

    JustinTime Master
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    It has to be tight enough so that the pulley doesn't move independently form the shaft it is on. Ideally the shaft will have a flat spot for the screw to sit against for best results.

    BTW, I almost always replace the grub screws with socket head screws. Mostly these screws are 3mm. The grub screws have a too small socket and the Allan key/screw almost always gets damaged when tightening and then it's almost impossible to get the screw out. The socket head screws have a way bigger socket and the Allan key works much better with it.
     
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  5. Ryan Lock

    Ryan Lock Master
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    Basically what Justin said. Our shafts do have the flat side, so one grub screw should be on that.
     
  6. gareth harvey

    gareth harvey Well-Known
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    Thanks, just got round to looking at this. I tightened the belts but this did not make a difference. I then re-adjusted the rollers on the X Axis and hey presto: It's working. They were just too tight.
     
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  7. Ryan Lock

    Ryan Lock Master
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    Hi Gareth,

    Great, glad you got it sorted.

    Ryan
     

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