Boolean with offset does not work on complicated fillet surfaces
dana_kelley262
Member Posts: 31 ✭
In this document there are two Boolean. The first leaves out the two surfaces that cause a failure. The second only has the two surfaces that cause the failure.
The offset of 0.015" is being used. Without the offset it works.
Initially I selected 0.015" offset all given that is the desired result.
Why doesn't this work?
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Best Answers
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Hi Dana, it is likely that the error is generated by Parasolid not being able to resolve the geometry into a manifold solid body (sorry for the jargon). This is something that is very geometry specific and would take time to fix only for this specific case. Subtracting the entire body with offset is computationally intensive. Perhaps subtracting with no offset, then using the Move Face command to apply the offset to the required faces may be a better solution.dana_kelley262 said:Thanks for your feedback. Interesting solution. I've submitted a bug report to find out what the issue is before moving forward.
The reason the fillet is "split" as in @steve_shubin 's image above, is that the original geometry (before the fillet) has four edges sharing a single vertex.
Senior Director, Technical Services, EMEA5 -
Never mind............. missed selecting the small wedged faces in the move face
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@dana_kelley262
I don’t know why the boolean with offset failed.
But if you’re interested in a workaround,
see the document below.
https://cad.onshape.com/documents/68bc73df32d1e5351be70c4f/w/16f68abd9376f30ca3cdfd84/e/d7696fbbd6d958faf1c8209c
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Thanks for your feedback. Interesting solution. I've submitted a bug report to find out what the issue is before moving forward.
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@dana_kelley262
I got it to work by using a single boolean — the way you wanted it to work
I used REPLACE FACE to eliminate the lines shown below. Then I was able to use a single boolean with offset on ALL THE FACES.
https://cad.onshape.com/documents/4ae02264d7f77c75f8239e4a/w/b96aafb51f9cc03b34ab1898/e/7e3aa785b65a1369e2142982
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Hi Dana, it is likely that the error is generated by Parasolid not being able to resolve the geometry into a manifold solid body (sorry for the jargon). This is something that is very geometry specific and would take time to fix only for this specific case. Subtracting the entire body with offset is computationally intensive. Perhaps subtracting with no offset, then using the Move Face command to apply the offset to the required faces may be a better solution.dana_kelley262 said:Thanks for your feedback. Interesting solution. I've submitted a bug report to find out what the issue is before moving forward.
The reason the fillet is "split" as in @steve_shubin 's image above, is that the original geometry (before the fillet) has four edges sharing a single vertex.
Senior Director, Technical Services, EMEA5 -
I saw that the no offset worked but did not realize there was a second step that could be used to add the offset. So one would ask this question. Why not break it into two processes? No offset followed by adding the offset. A hack perhaps but it eliminates future head scratching and hides it from the users.This solution worked just fine so Ill be moving on.
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It did not quite work after all.
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Never mind............. missed selecting the small wedged faces in the move face
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