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Issue with Shell when thickness is bigger than 0,03 inch

alain_ciottaalain_ciotta Member Posts: 4
edited April 2017 in Community Support
This is my public design:

Look for the tab: Torso v3

When you look to Torso v3, the part looks perfect. The issue I am facing is that every time I increase the thickness of the Shell above 0.03 inch, the part becomes a block and not halo anymore.

The ideal thickness will be 0.2 inch. How can I do that

PS: This part is needed for the STEM project for the VexIQ Worldcome


  • leon_pootleon_poot Member, Developers Posts: 87 ✭✭✭
    The small holes in Sketch 3 are causing your issue. The offset from these created by the shell are exactly touching each other in one line at a 0.2 in thickness because of their diameter and distance from each other. Onshape just doesn't know what to do with the faces. Same thing happens when I try to extrude these separately and boolean them to the body after the Shell.
    "A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools." - Douglas Adams, Mostly Harmless
  • owen_sparksowen_sparks Member, Developers Posts: 2,660 PRO
    edited April 2017
    Here's a bodge to give a thicker shell:-


    The principle was to:-
    (1) Make a boolen tool that is the negative of the part including the small details that cause the shell to fail.
    (2) Delete the faces causing the problems.
    (3) Shell to whatever thickness you wish
    (4) Use the boolean tool from 1 to put the features back in.

    Told you it was a bodge  :p

    I presume you'd need to bash some of the faces to make holes deeper.  I'm sure with some reordering of features there's a much nicer way of doing it!

    Cheers, Owen S
    Business Systems and Configuration Controller
    HWM-Water Ltd
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