Inside circles are round, outside is oval

New Home Forum Mostly Printed CNC – MPCNC Troubleshooting – MPCNC Inside circles are round, outside is oval

This topic contains 3 replies, has 2 voices, and was last updated by  Ryan 2 weeks ago.

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  • #112540

    Jeff
    Participant

    So I’ve decided to try and make a small box to practice my cam and fusion 360. I have found some odd behavior in the actual cutting, the inside circles are nearly perfectly round, but the outside circle is oval and not slightly oval but significantly oval. I’m not exactly sure what is happening. I’d imagine if my gantry was out of square the problem would be with both the inside and out side circles.

    https://i.imgur.com/6VOm51j.jpg

    #112567

    Ryan
    Keymaster

    Finishing pass?

    1 user thanked author for this post.
    #112647

    Jeff
    Participant

    Damn it! Why do I always for get about finishing passes? I will need to make a sign and post it next to my computer to remind me. Thanks Ryan, after I set up a finishing pass it worked much better, mind you I only did a test of the outer circle, I’ll run the full program tomorrow as its late.

    1 user thanked author for this post.
    #112699

    Ryan
    Keymaster

    I think that is good that is the issue but it does suggest one direction of your machine is not as rigid as the others. Not saying mine probably is not that way, but it could be something minor and you might improve your job time if you can pinpoint the issue.

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