Auto-orient chooses floating cantilever over bridging #1455

New Issue

MrUnknownDE · 2026-04-05T17:50:08+02:00

MrUnknownDE commented

2026-04-05 17:50:08 +02:00

Originally created by @mitufy on 12/1/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.1

Operating System (OS)

Windows

OS Version

Windows 10

Additional system information

No response

Printer

Bambulab A1

How to reproduce

Open the project file.
Use "auto-orient selected objects".

Actual results

The slicer flips the model, which results in a floating cantilever.

Expected results

The slicer maintains the original printing orientaion, which makes use of bridging.

Project file & Debug log uploads

When using auto-orient on the model, Orca slicer flips it, resulting in a floating cantilever. In the original orientation, the model prints with bridging, which yields a better result. The floating cantilever length is ~2.7mm, while the bridge is ~18.2mm.

Is this the intended behavior?

auto_orient_test.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @mitufy on 12/1/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.1 ### Operating System (OS) Windows ### OS Version Windows 10 ### Additional system information _No response_ ### Printer Bambulab A1 ### How to reproduce 1. Open the project file. 2. Use "auto-orient selected objects". ### Actual results The slicer flips the model, which results in a floating cantilever. ![Image](https://github.com/user-attachments/assets/85ac8771-d245-405e-b0fc-262afeb3d6ed) ### Expected results The slicer maintains the original printing orientaion, which makes use of bridging. ![Image](https://github.com/user-attachments/assets/c7361d7c-7458-476a-896a-ad6bc51703e5) ### Project file & Debug log uploads When using auto-orient on the model, Orca slicer flips it, resulting in a floating cantilever. In the original orientation, the model prints with bridging, which yields a better result. The floating cantilever length is ~2.7mm, while the bridge is ~18.2mm. Is this the intended behavior? [auto_orient_test.zip](https://github.com/user-attachments/files/23845214/auto_orient_test.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? _No response_

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Reference: github/OrcaSlicer#1455