Z-offset no longer behaves correctly after update #886

New Issue

MrUnknownDE · 2026-04-05T16:33:49+02:00

MrUnknownDE commented

2026-04-05 16:33:49 +02:00

Originally created by @JosemariaTorres on 2/4/2026

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 11

Additional system information

After a recent update, Z-offset no longer works as before.
Adjusting the Z-offset (via slicer) does not consistently affect the entire print, especially the first layer.
The same configuration worked correctly before the update.

Printer

Artillery Hornet - Klipper based

How to reproduce

Click on edit printer settings.
Modify Z Offset option.
slice a model
Inspect the generated G-code / preview.

Actual results

Changing the Z Offset in this version causes the printer to generate a Z move that brings the nozzle too close to the bed, sometimes below the build plate level.
This motion occurs without any extrusion (no printing happens during this move).
The actual STL model is not affected by the Z Offset change.
The Z Offset appears to be applied to a pre-print move or internal motion, rather than to the model’s coordinate system or first layer.

Expected results

Z Offset should:

Apply consistently to the entire print
Affect the first printed layer of the model
Not generate unsafe non-printing moves near or below the bed surface

Project file & Debug log uploads

z_offset_issue.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @JosemariaTorres on 2/4/2026* ### 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 11 ### Additional system information After a recent update, Z-offset no longer works as before. Adjusting the Z-offset (via slicer) does not consistently affect the entire print, especially the first layer. The same configuration worked correctly before the update. ### Printer Artillery Hornet - Klipper based ### How to reproduce 1. Click on edit printer settings. 2. Modify Z Offset option. 3. slice a model 4. Inspect the generated G-code / preview. ### Actual results - Changing the Z Offset in this version causes the printer to generate a Z move that brings the nozzle too close to the bed, sometimes below the build plate level. - This motion occurs without any extrusion (no printing happens during this move). - The actual STL model is not affected by the Z Offset change. - The Z Offset appears to be applied to a pre-print move or internal motion, rather than to the model’s coordinate system or first layer. ### Expected results Z Offset should: - Apply consistently to the entire print - Affect the first printed layer of the model - Not generate unsafe non-printing moves near or below the bed surface ### Project file & Debug log uploads [z_offset_issue.zip](https://github.com/user-attachments/files/25059188/z_offset_issue.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? _No response_

MrUnknownDE closed this issue

2026-04-05 16:33:49 +02:00

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Reference: github/OrcaSlicer#886