Z-Offset not applied to first extrusion (be it skirt, brim, ...] #1953

New Issue

MrUnknownDE · 2026-04-05T21:39:20+02:00

MrUnknownDE commented

2026-04-05 21:39:20 +02:00

Originally created by @orefokcam on 10/10/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.2-dev

Operating System (OS)

Windows

OS Version

Win11

Additional system information

No response

Printer

Voron 2.4r2

How to reproduce

In OrcaSlicer 2.3.2-dev, the slicer fails to apply the configured Z offset to the first extruded entity (typically the skirt), resulting in excessive squish and potential bed plate damage.
This behavior differs from OrcaSlicer 2.3.1-dev, where the Z-offset gets applied to all first-layer entities.

Set Printer Settings → Machine → Z Offset = 0.3
Slice a model with a skirt enabled
Observe generated G-code:
-- Skirt is printed at G1 Z0.2 (raw layer height)
-- Brim and model are printed at G1 Z0.5 (layer height + Z offset)

With skirt disabled, this behavior is transferred to the first subsequent entity, e.g. first brim.

This seems to be a first iteration bug.

Actual results

Skirt is printed at Z0.2, ignoring Z-offset
Brim and model are printed correctly at Z0.5
This causes excessive squish on the skirt, while the rest of the layer prints fine

Expected results

All first-layer entities (skirt, brim, model) should respect the slicer-defined Z offset and print at Z0.5 when Z offset = 0.3 and layer height is 0.2.

Project file & Debug log uploads

Applies to any project.

Checklist of files to include

Log file
Project file

Anything else?

Anyway, thanks for the good work and the effort you put in it.
I appreciate the features recently added.

*Originally created by @orefokcam on 10/10/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.2-dev ### Operating System (OS) Windows ### OS Version Win11 ### Additional system information _No response_ ### Printer Voron 2.4r2 ### How to reproduce In OrcaSlicer 2.3.2-dev, the slicer fails to apply the configured Z offset to the first extruded entity (typically the skirt), resulting in excessive squish and potential bed plate damage. This behavior differs from OrcaSlicer 2.3.1-dev, where the Z-offset gets applied to all first-layer entities. - Set Printer Settings → Machine → Z Offset = 0.3 - Slice a model with a skirt enabled - Observe generated G-code: -- Skirt is printed at G1 Z0.2 (raw layer height) -- Brim and model are printed at G1 Z0.5 (layer height + Z offset) With skirt disabled, this behavior is transferred to the first subsequent entity, e.g. first brim. This seems to be a first iteration bug. ### Actual results - Skirt is printed at Z0.2, ignoring Z-offset - Brim and model are printed correctly at Z0.5 - This causes excessive squish on the skirt, while the rest of the layer prints fine ### Expected results All first-layer entities (skirt, brim, model) should respect the slicer-defined Z offset and print at Z0.5 when Z offset = 0.3 and layer height is 0.2. ### Project file & Debug log uploads Applies to any project. ### Checklist of files to include - [ ] Log file - [ ] Project file ### Anything else? Anyway, thanks for the good work and the effort you put in it. I appreciate the features recently added.

MrUnknownDE closed this issue

2026-04-05 21:39:20 +02:00

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Reference: github/OrcaSlicer#1953