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Thread: V-carving chip off

  1. #1
    Join Date
    Mar 2012
    Location
    Brooklyn, NY
    Posts
    13

    Default V-carving chip off

    I've started cutting little pyramids with the V-carving bit, running in straight lines that cross (see image below). The bit runs up one vector line, then comes back down to finish the cut, then does the next row - can chips the resulting "peak" right off.
    For the most part, my company makes stuff out of basswood - until we got the CNC, this soft, shaggy wood was the norm so we have a LOT around. It's awful. On the other end of the scale, I have a bunch of brazillian ebony so dense that nothing will chip the peaks off. SO!
    1) is it safe to assume that if I can cut the basswood without chipping, I can scale the process up from there, and...
    2) what is the best method to avoid this kind of chipping? Sharp cutter, of course but fast RPMs, hard & fast tool speed? Low RPM, fast tool? High RPM, fast tool?
    The piece is very well secured, so I don't think it's a matter of...chatter (ugh, rhyme, sorry) but feel free to NOT rule that out...

    This one is ebony. All the chips & voids were there to begin with....

  2. #2
    Join Date
    Jan 2011
    Location
    gleason, wi 54435
    Posts
    449

    Default

    Tom I have done quite a bit of these v bit pyramids in basswood it is very fuzzy. Pine and cedar chip a lot. Maple , walnut, and birch cut pretty nice. Your exotics look very nice too. Slower rpm and moderate feed seem to work best. Bob

  3. #3
    Join Date
    Sep 2006
    Location
    Garland Tx
    Posts
    2,334

    Default

    Thomas

    I have a similar file... for part of a toy. I can run them all day in Ash with no problem, but try any softwood like pine... forget it!

    Steve
    Attached Images Attached Images

  4. #4
    Join Date
    Mar 2012
    Location
    Brooklyn, NY
    Posts
    13

    Default

    Thanks y'all! Perfect!

  5. #5
    Join Date
    Jul 2009
    Location
    Southeast Oklahoma
    Posts
    15

    Default

    You may want to make sure that you do the cross grain cuts first.

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