YOLO flow calibration appears to set all Top Surfaces flow values to 1 #798

New Issue

MrUnknownDE · 2026-04-05T16:31:22+02:00

MrUnknownDE commented

2026-04-05 16:31:22 +02:00

Originally created by @benz145 on 2/12/2026

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.1

Operating System (OS)

macOS

OS Version

Tahoe 26.2

Additional system information

No response

Printer

Bambu Lab A1

How to reproduce

Open new Orca Slicer window
Calibration > Flow Rate > YOLO (recommended)
Inspect "Top Surface Flow Ratio" for each individual chip

Actual results

"Top Surface Flow Ratio" is set to value 1 for every single chip, meaning all chips will print the top surface with the same flow value

Expected results

I expect that each chip would have a different Top Surface Flow value, which is the point of this calibration. While the "Flow Ratio" does indeed correctly change by a small amount for each chip, the "Top Surface Flow Ratio" does not. Because every chip has a Top Surface (as verified by the Line Type visualization), all chips are printed with the same Top Surface Flow Ratio of 1.

Project file & Debug log uploads

Orca YOLO Flow Calibration.3mf.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @benz145 on 2/12/2026* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.1 ### Operating System (OS) macOS ### OS Version Tahoe 26.2 ### Additional system information _No response_ ### Printer Bambu Lab A1 ### How to reproduce 1. Open new Orca Slicer window 2. Calibration > Flow Rate > YOLO (recommended) 3. Inspect "Top Surface Flow Ratio" for each individual chip ### Actual results "Top Surface Flow Ratio" is set to value 1 for every single chip, meaning all chips will print the top surface with the same flow value ### Expected results I expect that each chip would have a different Top Surface Flow value, which is the point of this calibration. While the "Flow Ratio" does indeed correctly change by a small amount for each chip, the "Top Surface Flow Ratio" does not. Because every chip has a Top Surface (as verified by the Line Type visualization), all chips are printed with the same Top Surface Flow Ratio of 1. ### Project file & Debug log uploads [Orca YOLO Flow Calibration.3mf.zip](https://github.com/user-attachments/files/25274264/Orca.YOLO.Flow.Calibration.3mf.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? _No response_

MrUnknownDE closed this issue

2026-04-05 16:31:22 +02:00

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Reference: github/OrcaSlicer#798