PetG Looks like crap
Never had much luck with PetG. Everyone else says it's easy. "Overture" brand.
Ratrig 3.0, using Superslicer w/PetG generic profile; defaults except 3 perimeters and a small brim. (extr: 240/235, bed: 80/80, infill 15%)
Note that the side arms start looking quite a bit better once the layers get above the 'busy' part of the model.
What's going on?
5 Replies
I've found that petg is one of the more difficult materials to dial in. Has a much smaller window of parameter settings that produce good prints and in some cases, I even need to tweak settings for specific models. From the looks of your print, may need to increase temp (although 240/234 seems OK if you are using a 0.4 nozzle.
Probably don't need a brim once it's dialed in. But, in general with petg, for me, I'm trying to avoid having any more squish than is needed to get good layer adhesion. Want to avoid any nozzle buildup
I use layer height = 75% off nozzle and try to manage widths appropriately to lay down the least amount of plastic possible and still get a good strong print
foreign-sapphire•16mo ago
Trying using the thing you are trying to print. I run an EVA 2 fan setup, No fan 2 layers then Fan 100%,V6 hotend 235 and the bed at 90. I also print relatively slowly.
I might also note, with some of these other hotends with high flow, with larger heat chambers than a V6 holding more heated material, the material might be actually at a higher temperature on your printer than my V6. For that reason also try dropping the temp by 5 degrees
and a 2nd note, it also looks a little over extruded, gets overheated from no cooling and too much material.
wise-white•16mo ago
I print overture petg at 270C for higher flow
this is probably a partial nozzle clog or its very wet
Im seeing what looks like insufficent flow in some areas
extrusion multiplier could be mistuned as well, I had do go to 85% on my machine
foreign-sapphire•16mo ago
At the moment I only print PETG, so I resolved to tune down as I require fine detail accuracy. My experience lends to the cure is actually the combination of all settings, extruder flow, temp, and print speed. High temp and high flow tend toward high print speed.
I print in PETG for ages and confirm that you can hardly ever use a default profile. It requires tuning. I ALWAYS start here: https://ellis3dp.com/Print-Tuning-Guide/. What throws me off a lot is the moisture ingress in filaments... I was strugling with 3 brands of PETG which where all working super a few weeks ago,... I now cooked all my filament (4 hours ate 50C in my oven) and all my troubles were gone,... (even though I store my filament in vacume bags,... with desiccant bags included... apparently moisture goes through plastic bags... go figure)