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Possible bug in sketch
mathias_millet
Member Posts: 9 ✭
in Drawings
Hello, while drawing things in a sketch, I had issues getting surfaces to appear, see this document: https://cad.onshape.com/documents/a0313f570c0fab32b5ed316e/w/94902ef2ef39ebdc3e971de5/e/9d4e80cd0c72bf78d789c47c?renderMode=0&uiState=67f7ff0092f6fe7eedfe5e2e
Depending on where I moved the middle lines, surface would form above or below. Extending the horizontal edges a bit seem to give correct behaviour though (see last image)
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In general, the constraint manager can be very twitchy with offset curves. You might be better off creating the offsets in an intermediate sketch and then adding the horizontal lines after. This makes life easier for the constraints solver to do what you want, because you're forcing it to be step by step.
https://cad.onshape.com/documents/de4f75f220d9ece89f564cb8/w/dc23d917810a6a824fdca796/e/d554e08d09c06139f3d9b3b1
I added "Sketch 3" which just has the offsets. I also made sure that the two offset curves are tangent, that their endpoints are constrained, and deleted one of the offset dimensions so that it would solve. In "Sketch 2" I just used those edges and constrained the edges of the horizontal lines. I think this is behaving the way you intended now.
Thanks for the feedback and the good tips !