Results 1 to 7 of 7

Thread: Eagle with oval cuts

  1. #1
    Join Date
    Aug 2012
    Location
    Wasilla, Alaska
    Posts
    65

    Default Eagle with oval cuts

    Following is the process I used to create the create the eagle hopefully, next time I won't have the three ovals.

    1. Utilizing Aspire 8
    2. Downloaded the eagle from Vector Art 3D
    3. Rough cut is a new .25 upcut end mill bit
    4. Finish cut is a new .125 balloons bit
    5. Preview does not show the oval cut
    6. Waste Board resurfaced
    7. Material is 1" Maple
    8. Planed both sides to include sanding
    9. Holddown clamps on all corners
    10. Three ovals coincide where the rough cut made step downs

    Any suggestion on eliminating the oval cuts
    Attached Files Attached Files

  2. #2
    Join Date
    Mar 2006
    Posts
    7,832

    Default

    "Finish cut is a new .125 balloons bit"
    I've never heard of a balloons bit. Is that an endmill or a ballnose bit? You need to use a ballnose bit on the finish pass. Try using a ballnose on the roughing pass also

    Are you sure there are no vectors hidden you just don't see?
    Words of Wisdom:
    “Words that sink into your ears are whispered…… not yelled”
    “The biggest trouble maker you’ll probably ever have to deal with, watches you from the mirror every morn’n”
    “The only difference between a rut and a grave is the depth”
    -----------
    Just remember...when it's time for the hearse to pull up..there's no luggage rack on top!
    -----------
    The beauty of the Second Amendment is that it will not be needed until they try to take it...Thomas Jefferson

  3. #3
    Join Date
    Dec 2000
    Location
    Thorp, WI
    Posts
    2,845

    Default

    What did you leave for a roughing toolpath machining allowance? An allowance of 0.04 - 0.05 and 3D raster (not Z level) across grain would be good. This allows just enough for the ballnose finish toolpath to clean up.
    Scott




  4. #4
    Join Date
    Aug 2012
    Location
    Wasilla, Alaska
    Posts
    65

    Default

    Thanks for your advice changed the parameters and the cribbage board turned out the way I imagined. Thanks again

  5. #5
    Join Date
    Apr 2013
    Location
    Kennebunkport, Maine
    Posts
    4,419

    Default

    Off topic;
    Scott W...what did you leave for an allowance on the 1911 grips you made out of the Quilted?
    I got some tearout on my shelf that took considerable sanding after using a .5"BN and wondered afterwards if I should have done a roughing pass first, and then a skim pass.
    That stuff is softer and has grain going everywhere.
    Thanks,
    scott
    scott P.
    2013 Desktop/spindle/VCP 11.5**
    Maine

  6. #6
    Join Date
    Dec 2000
    Location
    Thorp, WI
    Posts
    2,845

    Default

    Hey Scott,

    On the quilted, I did 0.04 allowance, across grain, Z level roughing with a 0.25" downcut endmill and then a 0.125" ballnose with the grain for the finish pass. I didn't necessarily get tear out, but it wasn't the best of finish and did take some sanding to clean up. The quilted is softer and does have a tendancy to tear out a bit, just like any highly figured wood (took on a lot of Tru-Oil too). On some of the others, I did 0.02 for a roughing allowance and did a 3D raster because I used a 0.04" tapered ballnose for the finish pass and it has a much shorter depth of cut. I actually snapped the tip off the 0.04" ballnose in a set that was made from some Brazilian cherry/Jatoba in a spot that had a bit extra material that was too deep for the bit. That's one thing to keep an eye on when using Z level roughing and also if the roughing pass doesn't drop fully over the outside edge and the finish one will. In other words, pay attention to the boundary offset too.

    I've got a project under way that when finished and I have time, I want to give one of those 30º bits a try to pull out more detail.

    Love the moose!! Kind of a collector of moose stuff. ;-)
    Scott




  7. #7
    Join Date
    Apr 2013
    Location
    Kennebunkport, Maine
    Posts
    4,419

    Default

    Thank you Very much Scott!
    When you do try a 30 engraving, try entering as a VBit vs. calling it out as an engraving with a flat. and preview both.
    The program thinks the pointed tip can get in there, but because of the flat it actually exaggerates the detail.
    Try entering as both and compare, just remember the VBit preview will look like hash until it's actually cut with the flat.
    Good when working smaller stuff.
    scott
    scott P.
    2013 Desktop/spindle/VCP 11.5**
    Maine

Similar Threads

  1. Y axis cuts oval, cant snug set screws up any tighter....
    By WoodcraftChronography in forum Troubleshooting
    Replies: 2
    Last Post: 12-20-2012, 10:23 AM
  2. bevel on oval
    By brian in forum ArtCAM
    Replies: 5
    Last Post: 07-18-2011, 01:15 AM
  3. Oval project
    By hykambois in forum Project Ideas
    Replies: 1
    Last Post: 05-09-2009, 09:57 PM
  4. WAR EAGLE !
    By angus_hines in forum Folder 2009
    Replies: 0
    Last Post: 03-27-2009, 09:16 PM
  5. Concave Oval?
    By joewino in forum ArtCAM
    Replies: 7
    Last Post: 06-20-2007, 10:54 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •