I playing around with my new A1 printer since a few days. Basically everything went fine and I already learned a lot. However, it seems I’m having the same issues on multiple prints:
I printed the last picture first with support structure and though “ok, seems like the transition from support structure to normal print doesn’t work well”. However, I have the same looking issue on other parts.
Basic data:
Bambu Lab PETG Basic, dried in a ofen.
Print speed silent or 50%
0,4mm noozle (standard)
flow rate manually calibrated, no change
Never had any adhesion problem
The printer is located in a quite cold (5-10°C right now) basement. Maybe this is unfortunate?
From my experience with the Bambu PETG, you should be drying the filament before printing. My prints on the p1p looked exactly like yours until I started putting the filament in a heat box prior to printing to draw out moisture. This goes for brand new never used spools too.
I put the brand new bambu spools for 2hours in the ofen @50°C, and it didn’t seem to change anything. However I will try again for a longer time. Altough, I’m already looking for some selfmade drybox to keep the spools dry.
Hey there I would blame the room temperature myself (I print with petg on defaults in 22c room with no drafts and have had absolutely no issues).
However if you believe it might be due to moisture there’s a drying guide on bambulab wiki: https://wiki.bambulab.com/en/filament-acc/filament/dry-filament
For PETG It states 60-70c for 8h inside the drying oven should be enough (they do not recommend kitchen ovens and microwaves).
