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Thread: Profile 1/8" Off?

  1. #1
    Join Date
    Jan 2013
    Location
    Massachusetts
    Posts
    91

    Default Profile 1/8" Off?

    I have a SB Buddy Standard 32". I noticed that my outside profile cuts are off by 1/8" smaller. I triple checked my numbers, cut 3 more profiles and they were all off by 1/8".

    Using:
    1/4" bit (checked with digital caliper)
    PC router
    Speed 2ips
    No offset allowance selected
    Outside selected
    Checked the size of the square 4.5 x 4.5
    Checked the solid preview of the toolpath--its right on
    Checked sbp file and it indicates a 4.5 cutting length

    What am I missing?
    See photos

    Profile toolpath.JPGProfile Close Up.JPGSBP File.JPG

  2. #2
    Join Date
    Sep 2006
    Location
    cnc routing, portland or
    Posts
    3,462

    Default

    that is a bit much but there is always slop in the machine os using a climb cut and a regular cut will take care of most of it. so do two passes climb and the fish cut regular one pass and see.

  3. #3
    Join Date
    Mar 2011
    Location
    Marietta, Ga.
    Posts
    296

    Default

    I had something like this happen to me one time; all seemed entered correctly for the bit that I had selected, but my cuts were off, like a different size bit was entered. It turned out that my .25" bit was "Selected", but, somehow, I had "Edited" that bit to a value of something like .1875" dia. How this happened, I don't know, and I don't know why I would have done that. But, I changed the Edit back to the same as the Selected, and all was well...joe

  4. #4
    Join Date
    Jan 2013
    Location
    Massachusetts
    Posts
    91

    Default

    Thanks for your help guys. It stumped me all night, was driving me crazy. And guess what.... the measuring tape I was using after the cut was off!!!! Unbelievable. Check EVERYTHING Boys & Girls!!!

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