Help With PETG Print
Help With PETG Print
https://imgchest.com/p/agyvg9qwy89
Been having issues with this Inland PETG. I've had so many failed prints. This 230C print temp and 80C build temp print was the least f***ed up print I had so far.
I also adjusted combing to Within Infill and retraction to 7mm at 60mms. All other settings should be default on Elegoo Cura N4P Normal settings
Some of the bridging is fine and there are sections that even look good but the rest are covered in blobs and stringing. The inside as it was printing was making noises and small pieces flew out as it was being scraped and stuff. The top layer shows a bit of what I mean.
I'm kind of new to this and can't seem to narrow down on what the issues are I found online. I've adjusted temps and only made it worse. I raised extruder a bit so that helped. I would like to make it looks as perfect as can be like my PLA prints.
Let me know your thoughts below, I'm happy to try them out.
Try tuning your extrusion multiplier, I've found that petg blobs up the nozzle if you don't slightly underextrude it, running 94% on my filament on the cold side but could probably go down lower, 94% almost completely did away with blobbing issues.
Is extrusion multiplier the same as flow rate?
It's something that's going to be different per filament Ellis' Guide has a good write up. I found with a 0.6mm nozzle I was getting ridges and stuff in the edges noted that it built up on the nozzle and then deposited blobs throughout the print. Reducing anything that can cause the nozzle to come in contact with material helps too, I use gyroid instead of grid because it doesn't cross itself for example.
It was absolutely noticeable, I'm using Canadian Filaments - Carbon Capture PETG for reference. I'd also look at drying the filament if possible can help with stringing
Is your part cooling fan working? Try increasing or decreasing that.
Fans are running at 100%
Your retraction speed might be a little fast. 20-30mms is usually what I use. Only use the part cooling fan on the bridges. Speed can be a bit interesting. PETG is stringy. I typically print PETG pretty slow. 40-50 if I'm going for fine detail. Would probably increase the temp a bit too. That's a bunch of wild-ass guesses but it's where I'd start.
Alright I will lower retraction to 6mm at 30 mm/s.
What's your print speed? PETG likes it slow, 30mm/s for most hotends.
Did you dry it
I reopened a brand new petg filament roll and it had the exact same issues
That doesn't mean it was dry from the factory I've had spools this year from Polymaker that were fine for the first third then had issues symptomatic of wet filament
I upgraded to a nickel-plated nozzle, and it made a noticeable difference in PETG sticking to the nozzle less. Not a huge difference, but worth the few extra dollars.