Fasteners WB, shape is not a shell

[jumbo125]

Hy everybody

I use Freecad:
OS: Windows 7
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.18.4 (GitTag)
Build type: Release
Branch: releases/FreeCAD-0-18
Hash: 980bf9060e28555fecd9e3462f68ca74007b70f8
Python version: 3.6.6
Qt version: 5.6.2
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: German/Germany (de_DE)


If i create a nut M6and set thread to true it looks great.
BUT if i create a nut smaller than M6 i get a error: Shape is not a Shell

does anybody knows the problem?

I reinstalled the WB and my freecad more than 3

[chrisb]

Works here. Try opening and recomputing the attached file.

OS: macOS High Sierra (10.13)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.18775 (Git)
Build type: Release
Branch: master
Hash: 9e93e621f9d5332114d29ea316f27aa6698eb70b
Python version: 3.7.3
Qt version: 5.12.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/Germany (en_DE)

[jumbo125]

Your file works. But if a create another nut, it crash....
test this, please

nut.FCStd

(17.32 KiB) Downloaded 50 times

[chrisb]

Sorry didn't read your post properly enough.
I can confirm the issue for threaded nuts for M5 and below.

[jumbo125]

Is there any solution?

[chrisb]

You can try using screwmaker macro. But may I ask what for you really need this? Threads are usually not modeled explicitely, especially nuts are readily available. Most 3D-printers won't print very small threads anyway reliable enough, so you have to rework them anyway.
If it is for a show case you may try one of the methods described in the Thread for Screw Tutorial, which also tells you how to do a thread all by yourself.

[shaise]

This issue started appearing with the OCC version 7.3.

[jumbo125]

Thank for your answers
Can I downgrade occ or set down?

[herbk]

Hi Shai

This issue started appearing with the OCC version 7.3.

i don't have it at

OS: openSUSE Leap 15.1 (KDE//usr/share/xsessions/plasma5)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.18738 (Git) AppImage
Build type: Release
Branch: master
Hash: f65a72deb71e8b2a18c849adc9a900c3d113d51b
Python version: 3.7.3
Qt version: 5.12.5
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: German/Germany (de_DE)


Edit: It only works if i not use PD! If i use PD i can create M5 Nut as smallest size.

[jumbo125]

You can try using screwmaker macro. But may I ask what for you really need this? Threads are usually not modeled explicitely, especially nuts are readily available. Most 3D-printers won't print very small threads anyway reliable enough, so you have to rework them anyway.
If it is for a show case you may try one of the methods described in the Thread for Screw Tutorial, which also tells you how to do a thread all by yourself.

I have a 1mm thick plate and need a m3 nut in this. Do you think, it will work, when i create a 2.5mm hole and try to cut the thread with the screw?