Extruder fan commands ignored during print

Hi

I connected a 40x40 cm fan on D9 (Ramps 1.4).
If I send M107 or M106 SX from Pronterface, everything ok.
But the same commands in the GCode of an object does absolutely nothing.

Any idea? I use the latest Marlin software.

D9 is meant to cool the print itself when using mother board type 33. Type 34 is for a dual-extruder set-up (not that your motherboard type is wrong).

Have you double checked your slicer settings? And is this only happening on the first few layers or is it always an issue?

Hi,

I just set the motherboard to type 34 and the printer don't recognize M106 or M107 command anymore (the fan remain off).
Yesterday I tried to connect the fan through the D2 connector but it remains on and do not recognize any command.

I checked Slic3r setting and everything is fine here but there is another a problem: slic3r do not generate adequate code.
I set it to disable the fan for the first layer only but the first M106 commands appears at the end of the print. I was expecting M106 S255 near G1 Z0.600 (which correspond to my 2 layer) but no. There is no fan command generated until almost the end of the print.

Any idea?

your board needs to be 33= hotend fan bed. 34= hotend1 hotend2 bed. like Kurzaa said.

In Slic3r, which is your minimun fan speed?

It was 35 (default) but I set it to 0

Perhaps try changing it back to 35? To me a setting of 0 tells the fan not to turn on.

In Slicr for Fan settings, it puts a comment on the page to confirm when and how fast the fan will activate for prints when you have entered the setting. For example mine says something like "Fan with turn on from Layer 1 at 85%"

I've change slic3r setting to 0% to 21% and turn off the fan for the 4 first layer.
Slicer 1.1.7 generated the code at the right value (good point)
Slicer 1.2.6 generated the code but the fan is set at full speed.

otherwise I created a simple gcode:

M106 S0
G28
G1 X100
M106 S255

and everything worked fine.

tonight I'll try to print something and share the results.

I didnt read to topic properly sorry.. !

I thought you couldn't control the fan

Edited 3 time(s). Last edit at 04/09/2015 03:52AM by supernielsen.