587,465 active members*
3,169 visitors online*
Register for free
Login
IndustryArena Forum > CAM Software > BobCad-Cam > Bobcad V28 won't let me pocket part with a 1/4" end mill
Results 1 to 15 of 15

Hybrid View

  1. #1
    Join Date
    Oct 2009
    Posts
    254

    Bobcad V28 won't let me pocket part with a 1/4" end mill

    Hey guys,

    BC won't allow me to use a .250" end mill for the pocket routine. It won't compute the tool path for it. If I enter in .125" for a bit size, it will compute just fine. At first I thought maybe one of the radius was too small but they aren't.

    Can someone please check out the attached part and tell me why it won't work with a .250" EM for the pocket? The file is inside the attached .zip

    Thank you.
    Attached Files Attached Files

  2. #2
    Join Date
    Aug 2006
    Posts
    56

    Re: Bobcad V28 won't let me pocket part with a 1/4" end mill

    Rotax;
    I didn't look beyond this first issue, but I believe for starters, there are geometry issues with the internal shape - I tried to chain select the internal shape, and all BBCD recognized (grabbed) was what is shown in red. This means one segment does not end where the previous one begins. My suggestion is to fix this and see if that solves your issue.

    Hope this helps.

  3. #3
    Join Date
    Oct 2009
    Posts
    254

    Re: Bobcad V28 won't let me pocket part with a 1/4" end mill

    Hey ShortTrack,

    Thanks for checking this out for me. I never zoomed in nearly as far as you. I clearly see there is some geometry issues with the shape. I'm going to examine my file right now. That way it's fixed for the next part run.

  4. #4
    Join Date
    Jun 2008
    Posts
    1838

    Re: Bobcad V28 won't let me pocket part with a 1/4" end mill

    ShortTrack has it right, with the geometry trimmed it works just fine so you will be good to go if you fix as per his suggestion



    Regards
    Rob
    :rainfro: :rainfro: :rainfro:

    P.S. Ah, I see you have already done it, if geometry won`t chain select in one go then there will always be a problem so you zoom right in at the ends of the highlighted section. Quick trim will do it as well
    Attached Thumbnails Attached Thumbnails Rotax91 Pocket.JPG  

  5. #5
    Join Date
    Oct 2009
    Posts
    254

    Re: Bobcad V28 won't let me pocket part with a 1/4" end mill

    Update: Cleaning up that worked!!! I used the Trim Extend / Two Entities function. Did you just happen to zoom in and find that or was there a function that found it?

    Thanks again.

  6. #6
    Join Date
    Oct 2009
    Posts
    254

    Re: Bobcad V28 won't let me pocket part with a 1/4" end mill

    Thanks Engine Guy for the tip. Appreciate the additional help. :cheers:

  7. #7

    Re: Bobcad V28 won't let me pocket part with a 1/4" end mill

    One way to look for those is to chain select the geometry and if it doesn't complete the chain wherever it stopped is where the issue is. There are instances though where very small gaps will still chain select but will cause issues with cam or BOBFart features. Those are fun when I load a big vector file that has tiny gaps all over it but all of it chain selects fine. Makes me hate my life with that junk. Wish BCC had a tab for finding open geometry.

  8. #8
    Join Date
    Dec 2008
    Posts
    4548

    Re: Bobcad V28 won't let me pocket part with a 1/4" end mill

    Quote Originally Posted by Beansdiesel View Post
    One way to look for those is to chain select the geometry and if it doesn't complete the chain wherever it stopped is where the issue is. There are instances though where very small gaps will still chain select but will cause issues with cam or BOBart features. Those are fun when I load a big vector file that has tiny gaps all over it but all of it chain selects fine. Makes me hate my life with that junk. Wish BCC had a tab for finding open geometry.
    You can go to Preferences-part and on the system tab up the chain selection tolerance.. It's default is .001, so anything smaller than that will chain select.. Try a setting of .0001 (Your cam tolerances are .0001 and .0005!!!!) Anyway, you can up that value so almost nothing that isn't connected will chain, so you can find the ends pretty quick.

  9. #9
    Quote Originally Posted by BurrMan View Post
    You can go to Preferences-part and on the system tab up the chain selection tolerance.. It's default is .001, so anything smaller than that will chain select.. Try a setting of .0001 (Your cam tolerances are .0001 and .0005!!!!) Anyway, you can up that value so almost nothing that isn't connected will chain, so you can find the ends pretty quick.
    I have set that to the lowest setting possible and it still chain select even though there is a gap. The biggest issue I have had with those tiny gaps is in Bobfart and generating embossings at a high resolution. The open geo will leave lines through the embossing. Turn down the stock resolution and it won't have the lines. It can be crazy maddening trying to hunt down gaps that are smaller then .0001".

  10. #10
    Join Date
    Dec 2008
    Posts
    4548

    Re: Bobcad V28 won't let me pocket part with a 1/4" end mill

    Quote Originally Posted by Beansdiesel View Post
    I have set that to the lowest setting possible and it still chain select even though there is a gap. ".
    You mean you set it to .000000000000001????? And it still selects over a gap?

  11. #11

    Re: Bobcad V28 won't let me pocket part with a 1/4" end mill

    Quote Originally Posted by BurrMan View Post
    You mean you set it to .000000000000001????? And it still selects over a gap?
    On mine with v27 if I go past .0001 then it is just .00000000000 and then it will not chain select no mater how air tight it is. Put in 0's until the 1 goes out of the box, then start deleting zeros and all you will wind up with is zeros. It will show the 1 until you click out of the box or hit Apply.

  12. #12
    Join Date
    Apr 2009
    Posts
    3376

    Re: Bobcad V28 won't let me pocket part with a 1/4" end mill

    Entities summary,,,make sure all 2D Geometry is on same plane

    Clean-up/Optimize also

Similar Threads

  1. Radius Wall Pocket BobCAD CAM V28 Mill Pro
    By aldepoalo in forum BobCad-Cam
    Replies: 0
    Last Post: 03-05-2016, 12:35 AM
  2. Replies: 0
    Last Post: 03-31-2015, 06:55 PM
  3. Replies: 4
    Last Post: 02-17-2013, 04:56 AM
  4. Replies: 1
    Last Post: 11-30-2011, 07:51 PM
  5. Made a "Part" in pro engineer, want now mill it on CNC.
    By CROSSHATCH in forum PTC Pro/Manufacture
    Replies: 15
    Last Post: 11-10-2007, 12:58 AM

Tags for this Thread

Posting Permissions

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