[Sheet Metal Workbench] Error invalid thickness

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Oktober
Posts: 2
Joined: Thu Sep 23, 2021 3:55 pm

[Sheet Metal Workbench] Error invalid thickness

Post by Oktober »

Hi all,

I have been using Freecad for a few years already but I am now playing with the sheet metal workbench and I can't seem to figure out why I keep getting an error message every time I want to unfold my parts. No matter what part I try to unfold or which face I select for the unfolding, I keep getting the same invalid thickness error message and then when I click OK I get the unfold failed error message as you can see in the screenshots below.
Has anyone any idea what is wrong here and how to fix it?
I also attach the two files I am working on right now in case that helps anyone to figure out what is going on here.
Screenshot_1.png
Screenshot_1.png (22.34 KiB) Viewed 311 times
Screenshot_2.png
Screenshot_2.png (23.91 KiB) Viewed 311 times
Screenshot_3.png
Screenshot_3.png (17.76 KiB) Viewed 311 times
Thanks a lot for your help

Here is my setup:
OS: Windows 10 Version 2004
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24276 (Git)
Build type: Release
Branch: releases/FreeCAD-0-19
Hash: a88db11e0a908f6e38f92bfc5187b13ebe470438
Python version: 3.8.6+
Qt version: 5.15.1
Coin version: 4.0.1
OCC version: 7.5.0
Locale: English/United States (en_US)
Attachments
2.FCStd
(278.17 KiB) Downloaded 10 times
1.FCStd
(516.43 KiB) Downloaded 7 times
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papyblaise
Posts: 4237
Joined: Thu Jun 13, 2019 4:28 pm
Location: France

Re: [Sheet Metal Workbench] Error invalid thickness

Post by papyblaise »

Has anyone any idea what is wrong here and how to fix it?
yes, I can: the 2 edges are welded in the red circle, it is necessary to indent this area so that the edges are free
Attachments
box.PNG
box.PNG (16.73 KiB) Viewed 263 times
Oktober
Posts: 2
Joined: Thu Sep 23, 2021 3:55 pm

Re: [Sheet Metal Workbench] Error invalid thickness

Post by Oktober »

OK, I have since learned how to do that and I still have the same problem.
File is attached.
Screenshot_5.png
Screenshot_5.png (18.11 KiB) Viewed 220 times
Thank you for your help, I really appreciate it.
Attachments
20210923 Enclosure base.FCStd
(519.9 KiB) Downloaded 12 times
User avatar
papyblaise
Posts: 4237
Joined: Thu Jun 13, 2019 4:28 pm
Location: France

Re: [Sheet Metal Workbench] Error invalid thickness

Post by papyblaise »

the cutting of the corner "box2" is automatic with SheetMetal latest version, before "extend", provided that the 3 edges are cut at the same time
for unfold to work there must not be the slightest overlap, so the best solution, when we start is to add an unfold after each bend, if it does not work, we look for the cause, if it works, we erase it (unfold) and we continue, until we are a master of the profession

Edit
it is often enough to modify the R folding so that the edges do not overlap (from R = 1 to R = 0.1mm)
I tried on your file, if I modify the outer edges, it crashes due to the topological renaming, hence the need to test the unfold step by step rather than having a general crash the finished project
Attachments
box1.PNG
box1.PNG (9.57 KiB) Viewed 163 times
box2.PNG
box2.PNG (19.13 KiB) Viewed 163 times
box1.FCStd
(304.7 KiB) Downloaded 9 times
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