before toolchange detracts on prime tower making a lot of stringing #1528

New Issue

MrUnknownDE · 2026-04-05T18:14:19+02:00

MrUnknownDE commented

2026-04-05 18:14:19 +02:00

Originally created by @cristobalmardonese-ui on 11/24/2025

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

11 25H2

Additional system information

No response

Printer

Creality Hi

How to reproduce

Load a multicolor object
slice with different colors
export g-code
print

Prime tower enabled
Widht 35mm
Prime Volume 45mm3
Brim Width 3mm
Wipe tower rotation angle 0°
Maximal bridging Distance 10mm
Wipe tower purge lines spacing 100%
Extra flow for purging 100%
Maximum wipe tower print speed 90mm/s
Wall Type Rectangle

Actual results

Just before the "tool Change" or change filament, the tool head goes to prime tower and make a "Detraction" over prime tower, after start to change filament procedure. This makes a lot of stringing from prime tower, there is not a retraction before this line. I played with settings to get which one is affecting this line in particular, and is the Retraction Lenght indeed, after I played with the speeds of retraction, changing Retraction and "Deretraction" and this line is afected to Deretraction speed.

Expected results

Makes sense to do a "Retraction", not a Detraction in this step.

Project file & Debug log uploads

Please check line 176566

orca_problem.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @cristobalmardonese-ui on 11/24/2025* ### 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 11 25H2 ### Additional system information _No response_ ### Printer Creality Hi ### How to reproduce 1. Load a multicolor object 2. slice with different colors 3. export g-code 4. print Prime tower enabled Widht 35mm Prime Volume 45mm3 Brim Width 3mm Wipe tower rotation angle 0° Maximal bridging Distance 10mm Wipe tower purge lines spacing 100% Extra flow for purging 100% Maximum wipe tower print speed 90mm/s Wall Type Rectangle <img width="488" height="425" alt="Image" src="https://github.com/user-attachments/assets/efbd33e1-d407-44a6-bb5d-7c76c66d91fa" /> <img width="800" height="946" alt="Image" src="https://github.com/user-attachments/assets/95b69ea8-649d-41b8-b61f-2a47adcf3391" /> <img width="743" height="943" alt="Image" src="https://github.com/user-attachments/assets/ea28c437-1057-4be1-bef9-6f9cb89fd398" /> ### Actual results Just before the "tool Change" or change filament, the tool head goes to prime tower and make a "Detraction" over prime tower, after start to change filament procedure. This makes a lot of stringing from prime tower, there is not a retraction before this line. I played with settings to get which one is affecting this line in particular, and is the Retraction Lenght indeed, after I played with the speeds of retraction, changing Retraction and "Deretraction" and this line is afected to Deretraction speed. ![Image](https://github.com/user-attachments/assets/f1cc0e2f-8004-407e-8ef2-23ba20e502aa) <img width="555" height="557" alt="Image" src="https://github.com/user-attachments/assets/2f2ebf08-7d59-4029-b61b-a1bc41fcb7f5" /> ### Expected results Makes sense to do a "Retraction", not a Detraction in this step. ### Project file & Debug log uploads Please check line 176566 [orca_problem.zip](https://github.com/user-attachments/files/23700685/orca_problem.zip) ### Checklist of files to include - [x] Log file - [x] Project file ### Anything else? _No response_

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Reference: github/OrcaSlicer#1528