z-hop performed at the end of some travel #1642

New Issue

MrUnknownDE · 2026-04-05T18:50:29+02:00

MrUnknownDE commented

2026-04-05 18:50:29 +02:00

Originally created by @jlo1975 on 11/12/2025

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

win10

Additional system information

No response

Printer

bambulab p1s

How to reproduce

1/ add primitive cube and clone it
2/slice
3/look at some move that are straight line and look at the G-code you will see the Z coordinate is not changing (so no hop) and at the travel ending you will wee 2 Z movement ( up and down)

Actual results

on some travel move, the z-hop is only performed at the end (up then down) so you get some marks on the ext-walls.
normally the z-hop should be done before or during the travel but not at the end.
in picture below at layer 94 you will see the travel (from left cube to right cube) that have a bad z-hop

Expected results

the z-hop to up the head should be done before/during the travel and at the end only 1 hop movement to down the head.

Project file & Debug log uploads

zhop_bug.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @jlo1975 on 11/12/2025* ### 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 win10 ### Additional system information _No response_ ### Printer bambulab p1s ### How to reproduce 1/ add primitive cube and clone it 2/slice 3/look at some move that are straight line and look at the G-code you will see the Z coordinate is not changing (so no hop) and at the travel ending you will wee 2 Z movement ( up and down) ### Actual results on some travel move, the z-hop is only performed at the end (up then down) so you get some marks on the ext-walls. normally the z-hop should be done before or during the travel but not at the end. in picture below at layer 94 you will see the travel (from left cube to right cube) that have a bad z-hop <img width="2560" height="1410" alt="Image" src="https://github.com/user-attachments/assets/c6d7dec1-8e4e-4958-9e02-6d6543a2972b" /> ### Expected results the z-hop to up the head should be done before/during the travel and at the end only 1 hop movement to down the head. ### Project file & Debug log uploads [zhop_bug.zip](https://github.com/user-attachments/files/23498254/zhop_bug.zip) ### Checklist of files to include - [ ] Log file - [ ] Project file ### Anything else? _No response_

MrUnknownDE closed this issue

2026-04-05 18:50:29 +02:00

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Reference: github/OrcaSlicer#1642