@SBix26 wrote:
I'd say that your sketch is fully constrained, the colors notwithstanding.
It's not because as you can see in the screencast the bracing can flip.
@SBix26 wrote:
I'm mystified by your use of Fix constraints, though-- wouldn't you want to constrain this to the origin planes?
Like I said this is a new co-workers part. I just deleted the sketch on the origin and grounded the lines at the base to simplify the part and make it easier to identify the issue. Those grounded constraint's are not affecting anything.
@SBix26 wrote:
In any case, if this is a skeleton for Frame Generator, why bother with a 3D sketch? I would use a combination of surfaces and 2D sketches, which are much easier to construct and control:
This is not for Frame Generator, it's for Autodesk Simulation mechanical and it's the only linetype that it will import form an ipt.
@SBix26 wrote:
Even though there are six sketches and a workplane involved, it is quick to construct and rock solid. Yes, I agree the 3D sketch should show as fully constrained. But this is so much easier! This file is attached below (2019 format).
This is how I would typically model it, and then'Include' those lines in a 3D sketch. But my co-worker is right, you shouldn't need to do that in order to get a functioning 3D sketch. It's extra steps.
Thanks for looking though!
Andrew Roth
rothmech.com

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