Recently, both of my X1C printers have started clogging during almost every print when using PET-CF filament (not PETG-CF). Each printer has about 1,500 hours of use, and I keep up with regular maintenance. I print nearly every day for business purposes.
The clogging happens specifically with Bambu PET-CF. I’ve successfully printed the same parts with this filament many times before, but the clogging only started in the last few weeks.
For context, I’ve been printing with Bambu PET-CF using both 0.4mm and 0.6mm nozzles for about 500 hours each. Recently, clogs began happening almost every time. To try to prevent the clogging, I’ve:
- Re-dried the filament as recommended
- Replaced the hardened steel hotends
- Replaced the extruder units and filament cutters
- Tried new spools of Bambu PET-CF
Despite these efforts, the nozzles keep clogging. The clogs start as a partial clog, but eventually blocks the nozzle completely.
Does anyone have any ideas on what the issue could be? I am pretty much using the default Bambu PET-CF Profile (the only change I made was infill (gryroid) and 6 walls, and chamber fan speed, see below).
The clogging started around the same time I noticed my chamber fan speed was at 100% during the print. I don’t ever recall this for months of sucessfull prints, as the fan is super loud. I supsect the default filament profile maybe updated during an update? I assumed this may have been my issue, so I modified the G-Code to turn off the fan, returning it to the fan speed I used before (0%). However, this didn’t solve the problem. Below is the G-Code I am using, maybe there is an issue with it?
; Filament gcode
{if activate_air_filtration[current_extruder] && support_air_filtration}
M106 P3 S{during_print_exhaust_fan_speed_num[current_extruder]}
{endif}
Any help on how to prevent these clogs would be super helpful!