Hi there. Found a really annoying bug in CAM simulation.
My job has 2 operation:
1) drilling
2) inner profile of hole
Generated G-code is fine, but on simulation looks like Freecad ignored tool offset or uses shank diameter instead of tool diameter to "cut" , so it looks like inner profile will have bigger diameter than suppose to be.
The same behavior on a Link branch.
OS: Windows 10 Version 2009
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24267 (Git)
Build type: Release
Branch: master
Hash: b2ca86d8d72b636011a73394bf9bcdedb3b109b7
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)
Inner profile operation simulation
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Inner profile operation simulation
- Attachments
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- test_path.FCStd
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Re: Inner profile operation simulation
I cannot confirm. I have added the (white) sketch with the tool diameter of 2mm and the drilled hole shows this diameter too:
Word size of FreeCAD: 64-bit
Version: 0.20.24612 (Git)
Build type: Release
Branch: master
Hash: f525904c1be10a0f55aa3502151c2c55e5054259
Python version: 3.9.2
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.1
Locale: C/Default (C)
OS: macOS 10.16Word size of FreeCAD: 64-bit
Version: 0.20.24612 (Git)
Build type: Release
Branch: master
Hash: f525904c1be10a0f55aa3502151c2c55e5054259
Python version: 3.9.2
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.1
Locale: C/Default (C)
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
Re: Inner profile operation simulation
I can confirm for the pocket.
OS: macOS 10.16
Word size of FreeCAD: 64-bit
Version: 0.20.24612 (Git)
Build type: Release
Branch: master
Hash: f525904c1be10a0f55aa3502151c2c55e5054259
Python version: 3.9.2
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.1
Locale: C/Default (C)
OS: macOS 10.16
Word size of FreeCAD: 64-bit
Version: 0.20.24612 (Git)
Build type: Release
Branch: master
Hash: f525904c1be10a0f55aa3502151c2c55e5054259
Python version: 3.9.2
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.1
Locale: C/Default (C)
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.
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- Posts: 255
- Joined: Sat Nov 14, 2020 9:16 pm
- Location: Bargara, Queensland, Australia UTC+10
Re: Inner profile operation simulation
Yes I can reproduce this. For a 3mm shank the extra clearance is displayed, for a 2mm shank it is displayed as expected. And as stated it is only the simulation.
If you slow down the simulation to 1 G/s you can see the tool edge contacting the pocket wall as it should but the graphics are displaying as a larger area removal, not just a resolution issue as the 2mm shank test displays correctly.
Trying something a bit more extreme with a 2mm endmill with a 6mm shank produces this.
OS: Ubuntu 20.04.2 LTS (ubuntu:GNOME/ubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24276 (Git) AppImage
Build type: Release
Branch: (HEAD detached at 0.19.1)
Hash: a88db11e0a908f6e38f92bfc5187b13ebe470438
Python version: 3.8.8
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.4.0
Locale: English/Australia (en_AU)