Fully constrained sketch, wire not closed ? [solved]
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- FredCailloux
- Posts: 52
- Joined: Wed Jul 14, 2021 7:37 pm
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Fully constrained sketch, wire not closed ? [solved]
I have this, not so complicated, sketch from which I get an error when trying to PAD .
The sketch is fully constrained and yet FreeCAD complain that the "Wire is not closed".
Questions:
1- Is it possible to have a fully constrained sketch with un-closed wires ?
2- How can I find where the problem is ?
The sketch is fully constrained and yet FreeCAD complain that the "Wire is not closed".
Questions:
1- Is it possible to have a fully constrained sketch with un-closed wires ?
2- How can I find where the problem is ?
- Attachments
-
- WireNotClosedSKT.png (14.16 KiB) Viewed 1699 times
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- WireNotClosed.png (21.5 KiB) Viewed 1699 times
Last edited by FredCailloux on Mon Jan 30, 2023 5:39 pm, edited 2 times in total.
Great results only comes with great understanding. Great memory is just an illusion.
Re: Fully constrained sketch, wire not closed ?
Try using the Sketcher ValidateSketch tool. Can you share the file ?
Re: Fully constrained sketch, wire not closed ?
There is a bit of misconception about the state "fully constrained". It really means all DOF's have a constraint applied and there are no redundant, over constraints, etc. situations. It does not imply the shape won't change or that it is considered closed.
To be considered closed all coincident vertexes must be marked coincident. Physical proximity does not imply coincident. And grid snap does not add coincident constraints.
You can deactivate a few geometric or dimensional constraints and wiggle the edges until you find the vertexes that aren't coincident.
You can also close the sketch and use the Validate sketch tool to find them.
You can also begin using polyline, trim, etc tools that automatically add coincident constraints to avoid the issue.
To be considered closed all coincident vertexes must be marked coincident. Physical proximity does not imply coincident. And grid snap does not add coincident constraints.
You can deactivate a few geometric or dimensional constraints and wiggle the edges until you find the vertexes that aren't coincident.
You can also close the sketch and use the Validate sketch tool to find them.
You can also begin using polyline, trim, etc tools that automatically add coincident constraints to avoid the issue.
Star Trek II: The Wrath of Khan: Spock: "...His pattern indicates two-dimensional thinking."
Re: Fully constrained sketch, wire not closed ?
From what we have seen in the past, it is well possible that you have additional elements doubling the visible ones.
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
- Shalmeneser
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Re: Fully constrained sketch, wire not closed ?
A solution : do multiple but simple sketches instead of just complex one.
- papyblaise
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Re: Fully constrained sketch, wire not closed ?
it's still a crystal ball enigma: without a file how do you want us to do
- Shalmeneser
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Re: Fully constrained sketch, wire not closed ?
- Attachments
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- WireTapping_SHALM.FCStd
- (60.97 KiB) Downloaded 25 times
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- Annotation 2023-01-30 121153.jpg (28.56 KiB) Viewed 1398 times
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- Annotation 2023-01-30 121225.jpg (34.32 KiB) Viewed 1398 times
- FredCailloux
- Posts: 52
- Joined: Wed Jul 14, 2021 7:37 pm
- Location: Canada
Re: Fully constrained sketch, wire not closed ? (solved)
Thanks for this tutorial. Very helpful.
It shows me a much more intuitive method of doing things... step by step with simpler sketches.
I will change my method for now on. Much appreciated.
Great results only comes with great understanding. Great memory is just an illusion.
- Shalmeneser
- Veteran
- Posts: 9582
- Joined: Wed Dec 23, 2020 12:04 am
- Location: Fr
Re: Fully constrained sketch, wire not closed ? [solved]
Simple sketches are less prone to TNP when refered.