Im suddenly having problems with this as well when i changed to this pursament orange petg.
Iâm in the middle of running a lot of tests.
I have ran about 15 calicats (most of them only about 30% done) and the cooling vs the extruder temperature is most of the impact.
I do know if you have a thinner layer height, it helps alot for this
Ive also decided no more zhop, which made a good impact all around once I was able to get my machine tuned enough.
Whenever i figure out this balance on this odd petg that doesnt seem to run like others, im going to assume it will work well for other petg as well. PLA should be easier to get so the knowledge should work backwards to that.
Right now im running my external fan mod at about 35% (which is where I had it before) and its gotten me the best results, but maybe this filament is just funky i dont know. currently i jacked the temp up another 5 degrees and the curling did get worse, but i think now i will leave it at the hotter temp and go back to fan adjustments for awhile.
that seems to be the case, thats what im trying to study right now.
on pla its less important, but cooling too fast will cause curling in any case.
ive gotten better luck with maybe 1/3 power cooling with lower end temperatures so far but when i start to find a ratio that comes out nice the part starts curling off the sheet. frustrating!
i usually ran PLA around 200 with full cooling and it typically stays pretty flat.
it could be that you are over extruding some and it is depositing in a way that looks like curling.
I really like to run this one test on teaching tech about slicer flow calibration, (this is after all the fancier tests). on PLA i run about 90% extrusion / flow rate and it comes out pretty well.
thinner layer high helps a lot for overhangs though
Unless I am trying to get a bridge without supports I turn the fan off for PETg. Also increase bed heat to 80c and raise the bed level by 0.05mm.
Your model doesnât look like stringing will be a problem so I will leave that one, the best settings seem to change per role of filament anyway.