[Solved] Unable to solve an issue

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ebolisa
Posts: 114
Joined: Thu Nov 24, 2022 9:04 pm

[Solved] Unable to solve an issue

Post by ebolisa »

Hi,

As seen in the image, there's a triangular artifact in the cylinder (tube) which I don't understand what's is causing it.

Any help is appreciated.

Code: Select all

OS: Windows 10 Version 2009
Word size of FreeCAD: 64-bit
Version: 0.20.2.29177 +426 (Git)
Build type: Release
Branch: (HEAD detached from 0.20.2)
Hash: 930dd9a76203a3260b1e6256c70c1c3cad8c5cb8
Python 3.8.10, Qt 5.15.2, Coin 4.0.1, Vtk 8.2.0, OCC 7.6.3
Locale: Spanish/Spain (es_ES)
Installed mods: 
  * Assembly4 0.12.6
  * Curves 0.6.8
  * dodo 1.0.0
  * fasteners 0.4.55
  * Lithophane
  * sheetmetal 0.2.63
  * ThreadProfile 1.84.0
Attachments
temp.FCStd
(570.34 KiB) Downloaded 14 times
1.png
1.png (122.54 KiB) Viewed 640 times
Last edited by ebolisa on Fri Jun 02, 2023 1:47 pm, edited 1 time in total.
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Shalmeneser
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Posts: 9474
Joined: Wed Dec 23, 2020 12:04 am
Location: Fr

Re: Unable to solve an issue

Post by Shalmeneser »

Sketch001 must not have a line perfectly along the inside of the cylinder (=coplanarity problem) : change offset to 14,01 mm.
You can use PartDesign_Hole for the threaded hole.

btw, find better name for your file.
Attachments
Annotation 2023-06-02 141902.jpg
Annotation 2023-06-02 141902.jpg (16.82 KiB) Viewed 596 times
Porte-manteau_SHALM.FCStd
(705.96 KiB) Downloaded 5 times
ebolisa
Posts: 114
Joined: Thu Nov 24, 2022 9:04 pm

Re: Unable to solve an issue

Post by ebolisa »

Shalmeneser wrote: Fri Jun 02, 2023 12:36 pm change offset to 14,01 mm.
Amazing what a difference 0,01 mm can do!
Thank you.
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Shalmeneser
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Posts: 9474
Joined: Wed Dec 23, 2020 12:04 am
Location: Fr

Re: Unable to solve an issue

Post by Shalmeneser »

Amazing what coplanarity can undo !

2 faces/lines at the same place can be a problem for numerical computation. A clear (but small) difference can help decide what is left/right or inside/outside.
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