[Cura is not turning on fan during print]

So I posted in a 6mo old thread to get help and need an answer now. I have a machine that has 2 layer cooling fans. I'm using Cura 4.4.1 . fans havent been engaging, thus giving me crappy quality. discovered that I have to set the Cooling Fan Number to 0, even though one would figure if ya have 2, put 2. so I did. and obv that messed it up apparently. yay Cura. so I set the number to 0. no difference, wont do another print til I get an answer. I really dont wanna have to turn em on in the tune settings.

[Cura is not turning on fan during print]

On 4/2/2019 at 10:17 PM, vis321 said:

I think I figured it out.

 

Cura 4.0.0 now has a new feature where you can select different number of cooling fans.

I looked at the gcode exported from cura 3.4.1 and the gcode from cura 4.0.0. I noticed the M106 command was exported as M106 S255 P1. I compared this to the gcode exported from cura 3.4.1 which just had M106 S255. I first tried to modify the gcode to have M106 S255 P0, AND THAT WORKED Later in my investigation I noticed in the "Machine Settings" under "Extruder 1", there is a new setting called "Cooling Fan Number", by default it was set to 1, hence the "P1" reference in the gcode.

Change the option under "Cooling Fan Number" from 1 to 0. 

 

After that I saw cura exported the gcode as before M106 S255. I popped in sd card and it seemed to solve my issue. I am sure maybe in the Marlin configuration you could change the fan number as well but this seemed to fix my issue.

 

Hope this helps! 

So.. I did this. Still not showing in the gcode. my machines got 2 fans. so I set the CFN to 2. machine wasnt turning em on , so I searched til I found this. I put it back to default(0) , and havent seen a diff. havent done a print since, hesitant because of this. my last 15 hr print , every piece had ripples all the way from bottom to top.