Wire is not closed freecad ошибка

There is flat surface (V-slot 2020 profile).
Need to make 2040 profile.

Edges was selected and using Defraturing tool, extracted and joined from original profile, mirrored and positioned to make other side of new profile.
Then sketch was created.
Trailing points was imported as external geometry, then new connection geometry was created. Sketch has zero freedom.
Now we need to make new face with new 2040 profile for able to extrude it for required length.
The problem is that resulting wires not closed. But it definitly should was closed. Seems like a bug.

OS: Ubuntu 18.04.4 LTS (Unity:Unity7:ubuntu/unity)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.
Build type: Release
Branch: unknown
Hash: d5f6c096b8089d5835a22a80667b00eda6721526
Python version: 3.6.9
Qt version: 5.9.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: Russian/Russia (ru_RU)

Hmm…the object called Block fails geometry check.

And the sketch Connection clearly not closed:

Sketch should not be closed, this is just wires, connected to another.

Self-intersection errors appears after connecting edges. This should not be so.
Wire is not closed error may be result of incorrect edges connection. But all edges are extracted from good face, as you can see.

You may dig all the way from original face, that contain no errors.

Object «Block» is result of Draft — Upgrade. In fact this is compound.

22:00:14  Upgrade objects
22:00:14  Found several non-treatable objects: creating compound

— Sir, our rocket should fly on 10 000 kilometers at 1000 km/h speed, but it not possible because jet engine won’t start, we must report to developers!
— No problem, just disassemble yout rocket, put parts in a car and drive wherewer you want.
— But Sir, it will took at least x1000 times longer…
— Who care your time if rocket will apear where you want? Probably you don’t need jet engine at all.

How are yout do that? Step by step. Sketch has no constraints, dimensions may be accidentally changed while editing.

HardRock wrote: ↑Wed Nov 25, 2020 7:54 pm
— Sir, our rocket should fly on 10 000 kilometers at 1000 km/h speed, but it not possible because jet engine won’t start, we must report to developers!
— No problem, just disassemble yout rocket, put parts in a car and drive wherewer you want.
— But Sir, it will took at least x1000 times longer…
— Who care your time if rocket will apear where you want? Probably you don’t need jet engine at all.

How are yout do that? Step by step. Sketch has no constraints, dimensions may be accidentally changed while editing.

335 degrees of freedom? You want I should constrain it for you? Sorry, I need to rearrange my sock drawer.
If I were to constrain, I’d remove all symmetric geometry, creating multiple sketches of symmetric pieces and pad/extrude (I’d use Part Design workbench)
This would minimize and optimize the constraining.

As to how I did this particular model:

I got rid of all but the V20x20P feature and connection sketch

• Select it Draft workbench, use convert between draft objects and sketch.
• Use space to hide V20x20P
• Copy and paste sketch
• open last sketch
• use move tool to move 20mm to the right.
• close sketch
• select both sketches
• use Sketch merge sketches tool
• hide first 2 sketches
• open the new sketch
• remove unwanted geometry
• Import external from connection sketch
• trace over as needed
• remove external geometry of the connection
• close sketch
• delete connection sketch
• extrude

HardRock wrote: ↑Wed Nov 25, 2020 6:26 pm
The problem is that resulting wires not closed. But it definitly should was closed. Seems like a bug.

Your ‘Edge001 (Mirror #2)’ has a weird Normal Z value of -0.119209 nm (nanometers !). Maybe there are other similar problems that prevent it to work correctly.

openBrain wrote: ↑Wed Nov 25, 2020 8:13 pm

HardRock wrote: ↑Wed Nov 25, 2020 6:26 pm
The problem is that resulting wires not closed. But it definitly should was closed. Seems like a bug.

Your ‘Edge001 (Mirror #2)’ has a weird Normal Z value of -0.119209 nm (nanometers !). Maybe there are other similar problems that prevent it to work correctly.

Could it be a result of selecting not only edges but vertices too? I dont know where it comes.

Using Defeaturing WB you may select connected separate edges and group it together to operate as one edge:
1. Manually select edges
2. Click «add selected Edges to list»
3. Click «create a copy of the In List edges»

So as above, i have made presence edges, then mirror them and use sketch to draw extra edges that not come from original part. In sketch external geometry was used. Problem has appeared when trying to connect all resulting edges togerter.

Interesting fact that when converting edges to sketch using Drafw WB, constarints like point and vertial / horizontal added automatically, exept points where sketch connected to extrenal edges.

exsolvespacer wrote: ↑Thu Nov 04, 2021 2:44 pm
I am trying to pad «Sketch2» in the attached file but it keeps saying «wire is not closed». Why does it do this? The wire *is* closed as far as my newbie eyes can tell me. What am I doing wrong?

Thanks.

I can’t get this message. What version of FreeCAD are you using ?
Sketch2 is correctly closed but the document is stuck in a weird state. I have to force recompute to be able to extrude (RMB on document name in the tree -> Mark to recompute -> ‘F5’). After that I can pad, though I have to reverse the Pad to avoid creating multiple objects which isn’t allowed.

Thanks again.

The suggestions have helped me find the problem. I recreated the strange shape and padded it out and I realised that previously I had a «defining geometry» line and I also had a normal polyline *on top* of the defining geometry line.

This meant there were 2 lines instead of 1 in the same place.

At least I hope that was the problem. Thanks again.

exsolvespacer wrote: ↑Thu Nov 04, 2021 3:14 pm
I have the stable RealThunder branch because someone on YouTube convinced me that there was a large problem with Freecad in the way objects were dependent on one another.

Kind of things why we request to give full FreeCAD info when asking for help. Please read link in the red banner to learn more.

exsolvespacer wrote: ↑Thu Nov 04, 2021 3:25 pm
Thanks again.

The suggestions have helped me find the problem. I recreated the strange shape and padded it out and I realised that previously I had a «defining geometry» line and I also had a normal polyline *on top* of the defining geometry line.

This meant there were 2 lines instead of 1 in the same place.

At least I hope that was the problem. Thanks again.

No that wasn’t the problem. FreeCAD safely ignores the external geometries when operating on sketches. As I told, just recomputing your document was enough for me.

openBrain wrote: ↑Thu Nov 04, 2021 3:29 pm

exsolvespacer wrote: ↑Thu Nov 04, 2021 3:14 pm
I have the stable RealThunder branch because someone on YouTube convinced me that there was a large problem with Freecad in the way objects were dependent on one another.

Kind of things why we request to give full FreeCAD info when asking for help. Please read link in the red banner to learn more.

exsolvespacer wrote: ↑Thu Nov 04, 2021 3:25 pm
Thanks again.

The suggestions have helped me find the problem. I recreated the strange shape and padded it out and I realised that previously I had a «defining geometry» line and I also had a normal polyline *on top* of the defining geometry line.

This meant there were 2 lines instead of 1 in the same place.

At least I hope that was the problem. Thanks again.

No that wasn’t the problem. FreeCAD safely ignores the external geometries when operating on sketches. As I told, just recomputing your document was enough for me.

Okay, thanks for clearing that up.

I will recompute next time I have a strange problem. All the best!