I’ve read a few things on curling and from what I can tell it is due to not enough cooling. I read one thing that said the opposite so I tried both ways on changing some settings.
My first print, the finished one was with fan off for initial layers, 60 heatbed and 200 nozzle temp.
The 2nd one, which looks like it got some initial layers of the print on top of the nozzle was fan off for initial print, 205 nozzle, 68 initial layers heatbed, 65 for the rest.
The 3rd, which is just the raft, is fan on 100% 200 nozzle, 55 bed.
Ideas and suggestions would be greatly appreciated.
Curling on the base layers is usually a sign of bad bed adhesion. Either from a dirty bed, wrong z-height, or wrong temperature. First I would say clean your heatbed with some 90%+ IPA. Second, recalibrate your Z-height, I can only speculate here since you didn’t post an image of the bottom side.
Also I found PLA works better with the door of the enclosure open, so the heat doesn’t build up inside. Keep the bed temps as low as possible as well, maybe 40 with the buildtak like sheet that comes with the snapmaker (I use 50-60 for PEI, I have not used the factory sheet)
EDIT: I also noted you’re running that filament cold (on the spool it says 220±10), which if the center doesn’t melt fully, creates internal stresses and curling (kinda like when it curls up under the nozzle during a purge). Try running it at 220-225 and see how it works.
At 76% I went to check on it and it had at some point in the past 15 minutes pulled away from the bed so I’m turning up the bed temp a bit to see if I can get better build adhesion.
