Coming from another post Ive seen on this board ( Part Cooling Fan, does not work while Printing ) this issue seems not to be resolved, at least not for me, nor for the OP of the other thread. Anycubic support does very little on this matter, and its not an electrical problem:
When printing something via octoprint (only when not printing a file on the printer's SD), nozzle fan doesnt start at all.
If i send an M106 or M106 S255 command via the Terminal Tab it doesnt do anything
If I send the command when printing is stopped, it works.
It seems that when not printing from the printer's SD somehow the M106 / M107 commands are ignored
What did you already try to solve it?
I put an M106 S255 command in the "Before Print Starts" section under GCODE Scripts in Octoprint, and it seems working, although it ovverides any fan speed changes in the GCODE file and the entire purpose of having the fan starting at a given layer.
I will not post a log of when printing via SD because the only comands passed are ok's and temperature warnings. Logs of when printing via internal memory are normal, except there are no M106 commands at all. Seems like they got stripped from the file. Obviously if I check the file in my pc all the commands are there where they need to be
OctoPrint 1.3.11 running on OctoPi 0.16.0 on a RPi 3b+, printer is Anycubic Chiron running stock firmware 1.3.0 (Marlin based)
Id really like to keep on printing via RPi's memory because when printing via SD the Gcode viewer doesnt work and also uploading a file on the SD via octoprint takes ages, but this fan problem is giving me headaches
Thanks to whoever will try to give some advice