RE: PETG: I Give Up!
I have great luck with PLA and Zero luck with PETG. I've tried so many variables with PETG that it would be difficult to list them all. I have tried the standard Prusament settings, several online settings for PETG and made so many adjustments that its driving me crazy. I've had issues with bridging (I know thats common), stringing, blobs, brittle prints, ugly finish etc... I have a Prusa MK2S printer and using Overture PETG (Which had good reviews from what i found). Any help would be appreciated.
PETG on Left and PLA on Right. I intentionally broke the PETG (Wasn't hard) to show the separation/poor bonding.
Closer pic of the PETG
1. You mentioned the PETG is brittle and stringing a lot. These can be indicative that the PETG filament has picked up too much moisture from the environment. If this is the case, you can put the spool in a special filament dehydrator, or DIY one yourself from a food dehydrator, to restore the filament to its original condition. It will make a huge difference. Maker's Muse did an episode about this very thing, and he found it had the most positive effects in PETG.
2. The Prusa textured PEI spring steel build plates are a godsend for printing PETG. They are night-and-day better than the older, smooth, stickered PEI buld plates that Prusa released in 2018. Fresh PETG prints stick very well to it, and yet reliably self-release when cooled.
RE: PETG: I Give Up!
Also, you did mention that you had baked the filament for 4 hours. Not sure, but it's possible (?) that may have damaged the filament.
RE: PETG: I Give Up!
@dimprov
I have a Mini and print PETG all the time. PETG is actually my "go-to" filament most of the time. In the thread, it mentions that you "baked" the filament? I am assuming you attempted to dehydrate the filament in the oven? Dehydrating in the oven is risky, because you need to know exactly how warm it is and the thermostats in ovens are notoriously inaccurate.
Before you give up on PETG, try a few things. Make sure you are printing SLOW - as in 40-45 mm/s. Regardless of what kind of PETG you are using, try the Prusament PETG parameters. Those are a pretty good starting point.
If you still do not get good results, your filament itself may be bad. Get new, quality PETG filament and try again with that. PETG is a good all-around filament and the Prusa MINI prints it just fine!
P.S. It looks to me like you don't have the filament hot enough... PETG is one of the best filaments for bonding to itself, primarily because it prints hot and sticky... What I'm saying is you should not be having layer separation with PETG...
RE: PETG: I Give Up!
Great, glad you are getting better results. I print tons of PETG, it's great once you get the temps dialed for each filament.
Fortunately haven't been as frustrated as you with PETG lately. But the Monoprice PLA I had, ugh...
RE: PETG: I Give Up!
@Ahand59,
I am currently trying to print PET-G with my prusa mini, but i cant quite get the settings right. I am struggeling to get the stringing away. Do you have any recomendations for the settings that you ue and what filament do you use?