https://imgchest.com/p/na7klqbby8d
So along the two sides that aren’t sticking properly, they were kind of bridged on there which explains the issues, however my second attempt printing with supports resulted in the same issues. I’m wondering why that is. I’m going to start printing with the fans off to see if that is the issue, everything else looks fine though. Let me know if you guys have any advice for better quality prints.
I would try with a brim, but I think it might be an issue with the design not having sufficient material at the base of those walls. The only way to tell is by looking at the sliced file layer by layer.
This is the sliced file and my attempt with supports.
A brim will help but the biggest thing is not to use fans at all during the first several layers and very sparingly after that. Also be sure your printer isn’t getting hit by a draft from an air vent or open window. PETG warps badly like this from too much cooling/temperature variation.
How much % is sparingly? I’m thinking of turning them off the entire print. It’s a pretty large print.
First things first, check your z offset petg doesn’t like being over squished and will lose adhesion because of it. The other thing you should do is ensure your surface is clean, depending on your surface a quick wash with soapy water and a brush is a good idea (some surfaces explicitly say not to do this, my buildtak surface called this out as something not to do), 99% IPA is decent at cleaning between prints but it’s a good idea to periodically degrease your surface.
In my experience, adhesion issues with petg have almost always been due to residual oils (fingerprints) or bad 1st layer squish. I print in an enclosure, for me I absolutely require cooling, Prusa’s knowledge base is a good place to start as well.
It might just be the specific spool/brand of PETG you used. Try buying some from a major well-known manufacturer, like Overture, Polymaker, etc. I’ve had cheaper brands shrink, warp, have adhesion issues, and all sorts of other quirks.
