Hey guys…
I just came across something. For some reason my part cooling fan doesn’t stop anymore during the purge on my X1C.
After some inspection of the generated gcode I found that the M106 commands are indeed in the code and the printer attempts to stop the fans just before it goes to cut the filament. However, as soon as a M109 (nozzle temperature change) is issued, the part cooling fan restarts and stays on during purging of the old filament. Resulting in not a small compact ‘poop’ but a stringy one that blocks the chute and leads to clogging. That’s a bummer, because I often use PLA/PETG support interfaces and as those filaments use quite different temperatures, that happens on almost every material change.
So my suspect is the firmware here. I was able to workaround by copying the M106 commands to stop the fans just before the actual purge in the filament change gcode of the printer profile.
That seems to do the trick but I wonder… Is it a bug or a feature?