Question Cooling fan don't start automatically.

[tomecko 0]

file.gcode Hello. I have anycubic mega zero. Until now it was everything fine but now when I want print something it doesn't automatically start cooling when i m looking on gcode file i cannot fined the command for fan to start cooling. Can someone help me solve this problem pls.  

[MariMakes 178]

Hey @tomecko,

 

Welcome to the Ultimaker Community 🎉

I checked your Gcode and it's indeed missing the M106 command.
But that could have a lot of causes. 🤔

 

Do you have a project file for us? It contains the printer and settings we need for troubleshooting. 
To save a project file go to File -> Save project.

[tomecko 0]

Here is the project file. Thx for that fast answer. 

 

cooling problem.3mf

[GregValiant 1,110]

@MariMakes I know we open a lot of files...

This is at Line 1120 of @tomecko's "file.gcode" file.

;LAYER:1
M106 S85

and line 1215

;LAYER:2
M106 S170

and line 1251

;LAYER:3
M106 S255

Line 61716 at the end of the file

M107

So it looks like the fan is off for the first layer and then the commands are there for it to ramp up to 100% at Layer 4 as it is set to.

This may be a hardware issue.

 

@tomecko can you turn the fan on manually from the LCD controls?

 

 

[gr5 2,069]

@tomecko - your cura settings have the fan off at layer 0 and gradually turning on on following layers.  Is that what you wanted?

[MariMakes 178]

@GregValiant and @gr5 are correct, the fan speed is indeed in your gcocde 😅
 

When I open your profile file I see that Regular Fan Speed at Layer is defined as layer 4. 
It's supposed to start spinning at the defined speed, 100%, at that layer. 
If that's not what you want you can change the Initial Fan Speed or the Regular Fan Speed Height. 
If that's not happening than there is probably something wrong with your hardware. 

[Snoozyl 0]

I have the same issue on my ender 3 v2. I was on cura 4.10 till this month and when i switched over the cooling on small parts stopped. I have to do a large 13h print before i start to get cooling and while i print the small parts the printer says the fan is on max but it doesnt spin. When i use an old gcode it works fine just like before. I think cura 5.1 and 5.2.1 have an issue with how they handel cooling.

[GregValiant 1,110]

"... the printer says the fan is on max but it doesn't spin."

 

The cooling commands have not changed.  If the fan % indicator on the LCD says the fan is at 100% then the printer saw an "M106" line in the gcode and reacted to it. 

 

If you go to "Manage Printers" and then "Machine Settings" and click on the "Extruder 1" tab you will see a box for "Cooling Fan Number".  Since you only have a single extruder you only have a single layer cooling fan and it's number is "0".  The setting isn't "Number of Cooling fans", but rather which fan works with which extruder.  In your case the "Cooling Fan Number" should be Zero.  Within the Gcode file should be lines like "M106 S255" and not "M106 S255 P1".

Edited January 3 by GregValiant