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FredCailloux
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Fully constrained sketch, wire not closed ? [solved]
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Postby FredCailloux »
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 ?
- Attachments
![Fully constrained sketch, wire not closed ? [solved] (2)](data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw== "Fully constrained sketch, wire not closed ? [solved] (2)")
- WireNotClosedSKT.png (14.16 KiB) Viewed 2110 times
- WireNotClosed.png (21.5 KiB) Viewed 2110 times
![Fully constrained sketch, wire not closed ? [solved] (2)](https://i0.wp.com/forum.freecad.org/download/file.php?id=214348&sid=b4b05fb6bc118a3f29f32926008b0728 "Fully constrained sketch, wire not closed ? [solved] (2)")
![Fully constrained sketch, wire not closed ? [solved] (3)](https://i0.wp.com/forum.freecad.org/download/file.php?id=214347&sid=b4b05fb6bc118a3f29f32926008b0728 "Fully constrained sketch, wire not closed ? [solved] (3)")
Last edited by FredCailloux on Mon Jan 30, 2023 5:39 pm, edited 2 times in total.
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NewJoker
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Re: Fully constrained sketch, wire not closed ?
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Postby NewJoker »
Try using the Sketcher ValidateSketch tool. Can you share the file ?
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- drmacro
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Re: Fully constrained sketch, wire not closed ?
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Postby drmacro »
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.
Star Trek II: The Wrath of Khan: Spock: "...His pattern indicates two-dimensional thinking."
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- chrisb
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Re: Fully constrained sketch, wire not closed ?
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Postby chrisb »
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.
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Shalmeneser
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Re: Fully constrained sketch, wire not closed ?
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Postby Shalmeneser »
A solution : do multiple but simple sketches instead of just complex one.
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papyblaise
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Re: Fully constrained sketch, wire not closed ?
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Postby papyblaise »
it's still a crystal ball enigma: without a file how do you want us to do
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Shalmeneser
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Re: Fully constrained sketch, wire not closed ?
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Postby Shalmeneser »
![Fully constrained sketch, wire not closed ? [solved] (8)](https://i0.wp.com/forum.freecad.org/images/smilies/icon_idea.gif "Fully constrained sketch, wire not closed ? [solved] (8)"){kind=icon}
- Attachments
- WireTapping_SHALM.FCStd
- (60.97 KiB) Downloaded 31 times
- Annotation 2023-01-30 121153.jpg (28.56 KiB) Viewed 1809 times
- Annotation 2023-01-30 121225.jpg (34.32 KiB) Viewed 1809 times
![Fully constrained sketch, wire not closed ? [solved] (9)](https://i0.wp.com/forum.freecad.org/download/file.php?id=214380&sid=b4b05fb6bc118a3f29f32926008b0728 "Fully constrained sketch, wire not closed ? [solved] (9)")
![Fully constrained sketch, wire not closed ? [solved] (10)](https://i0.wp.com/forum.freecad.org/download/file.php?id=214379&sid=b4b05fb6bc118a3f29f32926008b0728 "Fully constrained sketch, wire not closed ? [solved] (10)")
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FredCailloux
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- Joined: Wed Jul 14, 2021 7:37 pm
- Location: Canada
Re: Fully constrained sketch, wire not closed ? (solved)
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Postby FredCailloux »
Shalmeneser wrote: ↑Mon Jan 30, 2023 11:14 am
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.
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Shalmeneser
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Re: Fully constrained sketch, wire not closed ? [solved]
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Postby Shalmeneser »
Simple sketches are less prone to TNP when refered.
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