Seems like there is a lot of quantum fluctuation going on in this filament. My spool of BBL PETG was UNDER-extruding and after tuning, I had:
- Flow rate: 1.034
- Pressure Adv: 0.042
Which worked fine for the 0.4 nozzle at least as far as surface quality goes. It still sucked at bridging & overhangs. Then I swapped in a 0.6, and it was over-extruding now. I had to recalibrate the filament with the 0.6 nozzle and got:
- Flow rate: .9627
- Pressure Adv: 0.038
WTF?
BTW, PETG is notorious for sticking to the nozzle.
WRT suggestions, it’s hard to say what the issue is given how bad (IMHO) this filament is, but here goes:
Filament settings:
- increase fan speeds. This will negatively impact strength, but you’ll collect less material if you can get it to dry faster. Try going to 100% all the time and see if that helps. If so, you might be able to dial it back. I was successful with
Min: 40%/30 sec
Max: 100%/8 sec
I would try the fan speeds first. - enable retract on layer change
- enable wipe while retracting
Process settings
- turn off “reduce infill retraction”
- lower the print temp a bit