Comment on I'm doing something wrong; can't print this PETG
papalonian@lemmy.world 1 week ago
As others have said, you are severely under-extruding.
Looking at your pictures, I do see a potentially major issue that nobody has addressed: the taughtness of the filament between your hot end and runout sensor. It does not look like filament is being fed to the extruder easily enough for the extruder gears to grip the filament. If you’re able to print other filaments, it’s possible that this one has a harder or slicker surface than say PLA.
I would try temporarily disabling the runout sensor, and routing the filament under the top bar, directly to the hotend, to test this.
csm10495@sh.itjust.works 1 week ago
I instead tried printing directly from the spool holder immediately after taking it out of the dryer. Same thing happened. I doubt it could have moisture-d up that fast for it to make a difference
csm10495@sh.itjust.works 1 week ago
For good measure I tried going direct from the dryer to the hot end (and just left a piece in the runout sensor to have it not trip). More/less the same problems: imgur.com/a/65jzAQv … I stopped it early since it was failing terribly. Otherwise was using default cura generic PETG settings on .3mm per layer with .4mm nozzle.
papalonian@lemmy.world 1 week ago
0.3mm layers seems kinda high for a 0.4mm nozzle (I usually try to keep layer height ≤1/2 nozzle diameter), could be your hotend is having a hard time melting PETG that quickly?
csm10495@sh.itjust.works 1 week ago
This may have been it. Thanks! ref: sh.itjust.works/comment/22401881