"Bridge Counterbore Holes" - "sacrificial layer" does not detected all holes, but "Partially bridged" does

[ElEsido]

Is there an existing issue for this problem?

• I have searched the existing issues

OrcaSlicer Version

2.3.1 - alpha

Operating System (OS)

Windows

OS Version

Win 10

Additional system information

CPU: Amd Ryzen 5 3600
Memory: 16GB

Printer

Bambulab P1S

How to reproduce

1. Open a part with counterbore holes.
2. Under "Support" disable supports.
3. Under "Quality - Bridging - Bridge Counterbore Hole" choose "Partially Bridged" and slice. Observe that all counterbore holes are detected and partially bridged.
4. Now in the same setting choose "Sacrificial layer" and slice. Observe that NOT all counterbore holes are detected and given a sacrificial layer.
5. rotate part, slice again with setting "Sacrificial Layer" - repeat a couple of times. Observe that the number of identified counterbore holes changes.

Actual results

Option "Partially Bridged", all holes detected and partially bridged.

Option "Sacrificial Layer", one counterbore hole is detected and has a sacrificial layer

Part rotated, option "Sacrificial Layer", two counterbore holes are detected and have a sacrificial layer, two are not detected and the hole is printed in free air.

Further rotating results in 0-3 holes being detected, but never all 4.

Expected results

When choosing "Sacrificial Layer" all counterbore holes should be detected all the time, just like when choosing "Partially Bridged".

Project file & Debug log uploads

CounterboreHoles.zip

log.zip

Checklist of files to include

• Log file
• Project file

Anything else?

No response

[discip]

@ElEsido
Could you test this #10565?

Link to download:
https://github.com/SoftFever/OrcaSlicer/actions/runs/17304272227#:~:text=OrcaSlicer%2DLinux%2Dflatpak_PR,OrcaSlicer_Windows_PR10565_portable

[ElEsido]

@discip No, unfortunately this does not seem to solve the problem:

Partially bridged: All holes recognized

Sacrificial Layer: Some holes recognized:

Part rotated, no holes recognized:

[discip]

Unfortunately the only option left is:
Using support. 😅

[ElEsido]

:-D
I did that in this model, but am still puzzled by the differential treatment of "partially bridged" and "sacrificial layer". Do you know what goes on in the background? Is there a "counterbore hole detection routine" that differs between the two settings?