OrcaSlicer
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SoftFever
Bridge on TOP layer aroud holes
Is there an existing issue for this problem?
- [x] I have searched the existing issues
OrcaSlicer Version
from 2.2.0 beta above, also in latest 2.3.0 stable release
Operating System (OS)
Windows
OS Version
Windows 10
Additional system information
No response
Printer
Voron 2.4
How to reproduce
Hi, this issue in Orca Slicer has been present since version 2.2.0, which was released four months ago. Because of this, I’m still using version 2.1.1, where the problem doesn’t occur. :(
How to reproduce it: An object with threaded holes (size doesn’t matter) Layer height of 0.2 mm or more (it doesn’t appear at 0.15 mm or lower) A single perimeter on the top layer
Actual results
Expected results
No bridges on top layer
Project file & Debug log uploads
orca-test-bridge-top-layer.zip
Checklist of files to include
- [ ] Log file
- [ ] Project file
Anything else?
No response
Seems to be related to Layer height, as the issue disappears as soon as this value is reduced to at least 0.15 mm.
Seems to be related to
Layer height, as the issue disappears as soon as this value is reduced to at least 1.5 mm.
0.15 mm ;) And it is weird that nobody noticed it before. Hopefully, it can be easy to fix if it is only on a higher layer height.
Seems to be related to
Layer height, as the issue disappears as soon as this value is reduced to at least 0.15 mm.
With sharp enough edges the problem still exists. This is with 0.1mm layer height:
@discip will it be easy to fix?
Sorry, I forgot to answer. Unfortunately I'm no programmer, so no idea. 😅
I believe I've encountered the same bug. In my case additional bridge is getting generated at certain layer heights, not on top layer though. For my model the issue appears at heights 0.12 and 0.10. The issue doesn't occur if I slice the model with 0.12 height right after opening orcaslicer. If I slice it again the unwanted bridge appears.
Version: 2.3.0-rc
Model: bridge_problem.zip
I believe I've encountered the same bug. In my case additional bridge is getting generated at certain layer heights, not on top layer though. For my model the issue appears at heights 0.12 and 0.10. The issue doesn't occur if I slice the model with 0.12 height right after opening orcaslicer. If I slice it again the unwanted bridge appears.
Your model is non-manifold which caused this problem. If you are on windows you can click the repair button.
Ah I didn't notice the model is borked yesterday. I'll be able to see if repairing it will fix the issue later today. When I saw the problem happening only on certain layer heights I didn't think it could be an issue with the model, thanks for pointing that out.
Edit: Ok, I can confirm that in my case the problem was caused by non-manifold edges.
It is related to this change: https://github.com/SoftFever/OrcaSlicer/pull/6654
same problem in latest Prusaslicer 2.9.1, after testing lots of version ... it is ok in Prusaslicer 2.7.2 before implementation https://github.com/prusa3d/PrusaSlicer/commit/b133579126e6cee44f841f66dbae018455e32117
Also created bug report on source prusa slicer: https://github.com/prusa3d/PrusaSlicer/issues/14329
@Noisyfox Do you think it would be possible to revert it to its previous state before impementing: https://github.com/SoftFever/OrcaSlicer/pull/6654
Reverting that causes poor bridge anchoring if top layer is also the bridge layer. The real problem is, what do we want to do when the top layer contains bridges. I don't think there is a simple answer to this tbh.
I guess bridges on top surfaces need some sort of filtering, so tiny gaps won't be treated as bridges. Similar to what "filter out small internal bridges" does.
Please give the new pr a try.
The fix works, tested, awesome—I didn't even hope for such a quick fix! Hopefully, it didn't break anything else. Thanks a lot!
Hopefully, it didn't break anything else
That's also what I'm worried about. Gonna do more tests.
Hopefully, it didn't break anything else
That's also what I'm worried about. Gonna do more tests.
Using that and not found any problems with bridges ... so it looks ok! :)
The fix works, tested, awesome—I didn't even hope for such a quick fix! Hopefully, it didn't break anything else. Thanks a lot!
I have unfortunate news. This broke thin top surfaces.
I have unfortunate news. This broke thin top surfaces.
Can you share that stl file?
I have unfortunate news. This broke thin top surfaces. Can you share that stl file?
I've posted that in the pull request page, here's the file: file
My file uses 0.6mm nozzle which would make the thin top surface narrow enough and break it.
also with 0.6 nozzle with new fix: https://github.com/SoftFever/OrcaSlicer/actions/runs/14147293451
Just installed it, it's also fixed on my side now. Nice.