In a multi extruder setup the other extruders never heate up when ooze prevention is turned off! #103

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MrUnknownDE · 2026-04-05T16:18:27+02:00

MrUnknownDE commented

2026-04-05 16:18:27 +02:00

Originally created by @jaak0b on 3/28/2026

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.2

Operating System (OS)

Windows

OS Version

Windows 11

Additional system information

No response

Printer

Voron 2.4 using Stealthchanger

How to reproduce

Have a printer with 2 (or more) extruders
Set Ooze prevention Enabled to false
Slice a Model with two colors.

Export the gcode file

Actual results

The toolchange gcode is called (in my example T1) but the toolhead is never preheated resulting in a canceled print.

Exported gcode: 2.3.2_withoutOozePrevention_Cube v7_PLA_6m35s.zip

Expected results

I would expect the toolhead to preheated before trying to extruder with said extruder. When turning ooze prevention back on the toolhead heats up as expected.

Exported gcode: 2.3.2_withOozPrevention_Cube_PLA_26m31s.zip

Project file & Debug log uploads

This is the project im using for tested. Created in 2.3.2: Cube.zip

Checklist of files to include

Log file
Project file

Anything else?

This bug seams to be a result of changes made in https://github.com/OrcaSlicer/OrcaSlicer/pull/11791.

To me it does not make any sense that extruders, witch are used in a print are never heatup up in the first place?

*Originally created by @jaak0b on 3/28/2026* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.2 ### Operating System (OS) Windows ### OS Version Windows 11 ### Additional system information _No response_ ### Printer Voron 2.4 using Stealthchanger ### How to reproduce 1. Have a printer with 2 (or more) extruders 2. Set `Ooze prevention` `Enabled` to false 3. Slice a Model with two colors. <img width="444" height="403" alt="Image" src="https://github.com/user-attachments/assets/cfeb7842-1ed8-40b9-9412-1b83ebb625c8" /> 4. Export the gcode file ### Actual results The toolchange gcode is called (in my example T1) but the toolhead is never preheated resulting in a canceled print. Exported gcode: [2.3.2_withoutOozePrevention_Cube v7_PLA_6m35s.zip](https://github.com/user-attachments/files/26324542/2.3.2_Cube.v7_PLA_6m35s.zip) <img width="770" height="342" alt="Image" src="https://github.com/user-attachments/assets/5970b991-d0d3-4be2-9e1b-1c646a0a48b7" /> ### Expected results I would expect the toolhead to preheated before trying to extruder with said extruder. When turning ooze prevention back on the toolhead heats up as expected. Exported gcode: [2.3.2_withOozPrevention_Cube_PLA_26m31s.zip](https://github.com/user-attachments/files/26324591/2.3.2_withOozPrevention_Cube_PLA_26m31s.zip) <img width="637" height="272" alt="Image" src="https://github.com/user-attachments/assets/cdf6a15a-b23f-4ef3-8b81-a4a9499f2b23" /> ### Project file & Debug log uploads This is the project im using for tested. Created in 2.3.2: [Cube.zip](https://github.com/user-attachments/files/26324561/Cube.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? This bug seams to be a result of changes made in https://github.com/OrcaSlicer/OrcaSlicer/pull/11791. To me it does not make any sense that extruders, witch are used in a print are never heatup up in the first place?

MrUnknownDE closed this issue

2026-04-05 16:18:27 +02:00

MrUnknownDE added the bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug bug labels 2026-04-05 16:18:28 +02:00

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Reference: github/OrcaSlicer#103