3DPrinting

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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] 10 points 3 weeks ago (2 children)

What your picture is showing is not stringing, it appears to be an utter failure of layer adhesion. That indicates to me you are printing too cold or, more likely, too fast for PETG. What you're grinding against is most likely layers of the print that have not adhered to the layers below.

Try slowing it down and do a test print. See if anything improves.

[–] [email protected] 6 points 3 weeks ago (1 children)

Hoo boy I had it going way too fast. I had it moving at 150mm/s. I very strongly suspect this is about 90% of my problem. Layer quality already seems vastly improved a few layers in at 50mm/s. I very much appreciate the insight!

[–] [email protected] 2 points 3 weeks ago

I agree that it's probably a speed issue. When I first started printing, I was seeing just how fast I could go with PLA and tuning for that. Decided to try out PETG a few months later, and it was a disaster. Layers weren't bonding properly, and the filament would bridge across points on the print. Once I backed print speed down to 50, I started to get much better results.

[–] [email protected] 2 points 3 weeks ago

Word. I'll give that a go, thank you.