Ticket #4009 - Dog-bone on mill face locks up

[freman]

I have a milled path on the outer corners of the model. If I try to add dog-bone it locks up solid, directly everytime.

Anyone else care to check?

Code: Select all

OS: Linux (LXDE/LXDE)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.16854 (Git)
Build type: Release
Branch: master
Hash: fe0fd5512ba9a8a9c729cdc47af35bbe965050ac
Python version: 2.7.15
Qt version: 4.8.7
Coin version: 4.0.0a
OCC version: 7.3.0
Locale: English/UnitedKingdom (en_GB)

[chrisb]

You have several operations in the job, which one do you want to dogbone Mill-base1-3 and Mil-base0-2?

[freman]

yes either of those totally chokes on a dog-bone

Maybe because they have two parts. I just thought I should flag some of these bugs. Maybe I do somewhat unexpected things or devs just check a well trodden path. Folks who "know" what to do often fail to check less probable, but legit, work paths.

[chrisb]

I can confirm the lockup. It doesn't lock if the Path covers only one corner.

[sliptonic]

Please open a mantis ticket for this an reference this topic. Maybe edit the thread subject as well (Fix 'Bog-bone' and add a BUG ####: )

[freman]

I had not noticed the typo , thanks.

bug report:
https://www.freecadweb.org/tracker/view.php?id=4009

[Kunda1]

Added issue #4009 to thread title

[Kunda1]

There is a workaround posted by sliptonic (https://tracker.freecadweb.org/view.php?id=4009#c13176)
but it doesn't address the freeze issue that the bug causes.
Is issue #4009 getting bumped to next release (0.20) ?

[tonio_k]

I have a similar issue with dogbone dressup. However, things are a little less deterministic in my case, it seems. Sometimes, changing stepdown after using DogboneDressup locks up FreeCAD, sometimes using the DogboneDressup path modifier at all with something else but the default tool locks up the program. I've looked into the Python script for Dogbone, but it was not very obvious to me what happens there. Is there any documentation regarding the Path toolbench and its code? So far, I have only found https://wiki.freecadweb.org/Path_scripting, which doesnt cover very much.

freecad_freeze1.png (225.97 KiB) Viewed 1624 times

By working around with using the default tool and job parameters at first and changing the tool and cutting depths etc. later, I could manage to get closer to my desired outcome, however changing parameters like stepdown freezes everything again.

freecad_workaround_pre_freeze.png (192.14 KiB) Viewed 1624 times

If someone more competent than me could look into the issue and maybe even give some hints where to start with understanding the underlying code/FreeCAD framework, I'd be very glad.

OS: Ubuntu 20.04.2 LTS (XFCE/xubuntu)
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.23756 (Git) AppImage
Build type: Release
Branch: master
Hash: 9c6e9184930a52b165a0b7274e3a45d1006bfe67
Python version: 3.8.6
Qt version: 5.12.5
Coin version: 4.0.0
OCC version: 7.4.0
Locale: German/Germany (de_DE)

[mlampert]

Dogbone is not supposed to work on PocketShape. Not sure if this is a regression or if somebody enabled this on purpose. It's also not very useful to have dogbones on each pass, only the last (outer) pass needs them.