PETG Problems
So I'm having 2 issues while printing PETG on my VCore 3 500. One issue is bridging, even when supported. Small bridging isn't coming out terrible but not great either. But in further layers it ends up being good enough. In the second picture you can see top layers of the same print are coming out weird. I dont even know how to describe that. I'm running at 235 and will gladly send any additional info.
7 Replies
What filament tuning have you done? The second pic looks like over extrusion. Petg is sneaky, the over extrusion isn't consistent and instead it poops out blobs like that. I think it's because when melty it has a viscosity or texture with some spring to it.
Tune extrusion multiplier, pressure advance, then retraction.
So I haven't done very much. I admit I am not very knowledgeable about the more technical bits of 3D printing despite having been doing it for a number of years now. I have gotten my retraction pretty well tuned which was something I messed with in an attempt to solve stringing a while back. But as far as the extrusion multiplier and pressure advance, I am not familiar with these. I've heard of them but don't have any experience messing with them.
It's just practice. The calibrations in Orca are the easy way. Or read more:
https://ellis3dp.com/Print-Tuning-Guide/articles/index_pressure_advance.html
https://ellis3dp.com/Print-Tuning-Guide/articles/extrusion_multiplier.html
I've found for petg, the EM is stupid low. much closer to 0.8 than 0.95-1.0 for the ratrigs. Pressure advance will be on the lower side too.
So checking my settings (I use Super Slicer) my EM is .94. Not sure how much tampering I should do with that. I can't find a setting for pressure advance though. I may knock the EM down a bit at a time to see what difference it makes but idk if I should go all the way to .8 right away lol
Brackets. Make a big move. Bad results? Come back by half. It's a binary search for the real world
Download orcaslicer and never look back. Once you get familiar with it come back and I ill share my settings. I have perfect petg bridging settings.
Also dry your filament
Could you share you seetings anyway? I have bad prints with PETG. After drying it works better but bridges especially are very bad at any temperature.