fan_speedup_time does not set initial fan speed to 0.

[michaeljgolden]

Is there an existing issue for this problem?

• I have searched the existing issues

OrcaSlicer Version

2.2.0

Operating System (OS)

Windows

OS Version

Windows 11

Additional system information

Probably doesn't apply; filling out anyways.
12th Gen Intel i7-12700K
32 GB RAM 3200 MT/s
NVIDIA GeForce RTX 3080

Printer

Anycubic Kobra 3 0.4 nozzle

How to reproduce

First you can slice a simple Benchy print and output G-code. You will see this:

; filament start gcode
M106 S0

Where it sets the fan speed to 0. In my G-code output, it is line 112, right after the "Machine start G-code".
Then open your printer settings to the "Basic information" tab, section "Cooling Fan" and change either "Fan speed-up time" or "Fan kick-start time" to a value other than 0. I've been using 0.4.
Generate G-code again and you will see the M106 line missing.

My printer, Anycubik Kobra 3, likes to leave the fan at 100% when starting a print, after its pre-print routines (nozzle wipe, bed level...).

Actual results

"M106 S0" command missing.

Expected results

"M106 S0" command still there.

Project file & Debug log uploads

Attaching the project file with a benchy in it, with the setting set that causes the missing "M106 S0" command. You will have to set the value back to 0 to see it working correctly.
Fan_Speedup_Time test.zip

Checklist of files to include

• Log file
• Project file

Anything else?

Note: It may require the option "No cooling for the first" X layers to be greater than 0. I always have that set to 1 or more layers.
That setting is in "Material settings" -> "Cooling" tab -> "Cooling for specific layer" -> "No colling for the first".

Sorry if I am being too verbose. I didn't want to leave anything too vague. I am a Software Engineer with 27 years experience.