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(Troubleshooting) Advice for improvement (lemmy.world)

submitted 3 weeks ago by [email protected] to c/[email protected]

12 comments fedilink hide all child comments

My prints up to this point have been okay, but not great. Serious stringing seems to be an issue here, and one of the things I've notice is that the further along the print goes, the more it seems like the print head is almost grinding into the print. To the point where if I'm printing something like a minifigure, it will get ripped apart mid print. Am I overextruding? Missing z steps?

Filament is Overture PETG, Nozzle is 230C and bed is 80C. I have it in an enclosure. I'm running it from a laptop set up with Cura.

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[–] [email protected] 6 points 3 weeks ago* (last edited 3 weeks ago) (2 children)

PETG is picky about layer heights and speed.

Thick and slow for PETG. I usually double my layer height vs what I would print in PLA. With my .6 nozzle I print with .3 layer and cut my speed down to 50% for the first layer. Since you said it happens mid print you might be printing too fast for the first few layers and it is getting too high because the layer is not cooling enough and it starts curling. You can also try reducing flow if your nozzle is worn and it's allowing more plastic than the sclicer expects which will cause too high layers and scraping.

Oh and it sounds like it's too hot too. 80° bed in a enclosure could cause the chamber to get too hot and not allow the layers to cool fast enough and so you will see curling while printing. Lower the bed to 40-50 and monitor chamber temps. Maybe open the doors a crack. You only need an enclosure for PETG if the room is drafty.

[–] [email protected] 1 points 3 weeks ago

I haven't had issues with curling but the enclosure is pretty new. The room is pretty variable with temps. The windows are old and maybe a little leaky.

[–] [email protected] 1 points 3 weeks ago

Interesting, so best practice is to increase layer height for PETG. Seems good to know