Time Estimates -increase- with increases to movement speed and max volumetric flow #2160

New Issue

MrUnknownDE · 2026-04-06T00:45:49+02:00

MrUnknownDE commented

2026-04-06 00:45:49 +02:00

Originally created by @bobziuchkovski on 9/17/2025

Is there an existing issue for this problem?

I have searched the existing issues

OrcaSlicer Version

2.3.0 (release version, 70931e5)

Operating System (OS)

macOS

OS Version

15.6.1

Additional system information

No response

Printer

Creality K1C, 0.4 nozzle

How to reproduce

Open tree-estimates-1.3mf from the attached tree-estimates.zip.
Slice and review time estimates.
Increase the layer motion speeds -- I used 500mm/s for everything.
Increase the filament's max volumetric speed -- I used 50mm/s^2.
Slice again and review the time estimates. Note the increased print time estimate with the faster motion speeds and increased volumetric speed.

I've also included a tree-estimates-2.3mf file in the zip, captured after I made the above settings changes.

Actual results

Prior to increasing the motion speeds and volumetric speed, I saw an estimate of 1h13m
After increasing these settings, the estimate jumped to 1h18m

Before

After

Expected results

The time estimates should decrease rather than increase when the print is configured to move the head faster.

Project file & Debug log uploads

tree-estimates.zip

Checklist of files to include

Log file
Project file

Anything else?

No response

*Originally created by @bobziuchkovski on 9/17/2025* ### Is there an existing issue for this problem? - [x] I have searched the existing issues ### OrcaSlicer Version 2.3.0 (release version, 70931e5) ### Operating System (OS) macOS ### OS Version 15.6.1 ### Additional system information _No response_ ### Printer Creality K1C, 0.4 nozzle ### How to reproduce 1. Open `tree-estimates-1.3mf` from the attached tree-estimates.zip. 2. Slice and review time estimates. 3. Increase the layer motion speeds -- I used 500mm/s for everything. 4. Increase the filament's max volumetric speed -- I used 50mm/s^2. 5. Slice again and review the time estimates. Note the _increased_ print time estimate with the faster motion speeds and increased volumetric speed. I've also included a `tree-estimates-2.3mf` file in the zip, captured after I made the above settings changes. ### Actual results 1. Prior to increasing the motion speeds and volumetric speed, I saw an estimate of **1h13m** 2. After increasing these settings, the estimate jumped to **1h18m** # Before <img width="1621" height="981" alt="Image" src="https://github.com/user-attachments/assets/0d5b065f-337b-4443-a7ef-7a5c0e59400e" /> # After <img width="1621" height="981" alt="Image" src="https://github.com/user-attachments/assets/31cc2db8-27f8-4b85-b88f-d2c920586a3c" /> ### Expected results The time estimates should decrease rather than increase when the print is configured to move the head faster. ### Project file & Debug log uploads [tree-estimates.zip](https://github.com/user-attachments/files/22388422/tree-estimates.zip) ### Checklist of files to include - [ ] Log file - [x] Project file ### Anything else? _No response_

MrUnknownDE closed this issue

2026-04-06 00:45:49 +02:00

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Reference: github/OrcaSlicer#2160