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Why does this Ruled Surface fail?
bernhard_petri
Member Posts: 8 ✭
Hi onshape forum!
I'm trying to create a ruled surface and it fails. I cannot figure out why it does and I'm currently unable to figure out a workaround.
I'm referring to the last feature in this document (a simplified recreation of my issue):
https://cad.onshape.com/documents/e979d6d1d47d1d9e94efecbd/w/7c9cc67840120426cdf86a80/e/38e7b897b5f2552e38beecaf
Any insight would be appreciated!
Best Answer
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S1mon
Member Posts: 3,315 PRO
Ruled surface is not liking the two "poles" of your original revolved surface. I suspect that it gets confused by the degenerate nature of the surface there.
I trimmed the poles out, and ruled surface works.
https://cad.onshape.com/documents/3ab00b53b48995bdbd161116/v/8f86a8b56e8be9a2a956d263/e/779ed4de834f8b4b334c010b
Depending on what you need to do next, you could create some lofts or boundary surfaces to fix the missing pieces.
1
Answers
Hmmmm … I can't see. It is read only, so it cannot be edited or rolled back to be analyzed. It is not even clear what the ruled surface was meant to be.
@martin_kopplow I've changed it to public, sorry about that. The ruled surface was meant to be a normal surface around the edge of the shown surface. Cheers
Ruled surface is not liking the two "poles" of your original revolved surface. I suspect that it gets confused by the degenerate nature of the surface there.
I trimmed the poles out, and ruled surface works.
https://cad.onshape.com/documents/3ab00b53b48995bdbd161116/v/8f86a8b56e8be9a2a956d263/e/779ed4de834f8b4b334c010b
Depending on what you need to do next, you could create some lofts or boundary surfaces to fix the missing pieces.
@bernhard_petri
Okay, I looked at it, but am not sure what you're trying to achieve. It appears you might want to recreate a surface you already have. What is the intention? If you want a straight connection between the two swirled curves, a loft might be an option. It will always be tricky with the two curves meeting at such a pointy angle at both ends, though.
Without these pointy ends (cut them off to isolate the issue), your settings would have returned someting like this:
https://cad.onshape.com/documents/dcc988a5b1d3a081990eb2f5/w/6f059eebfcf72f73cb8b696a/e/249ee8634c320d44cdb463ee?renderMode=0&uiState=682e02d7baaca1543b37e25d
You could have achived this in full length and with one click by means of the thicken tool. Just delete the inside face later.