PETG secret

staticlinerich

What is the secret? Tried the plethora of YouTube videos on the topic. New to PETG and it seems to be an entirely different animal than PLA. My issue is bed adhesion. I have the bed covered with Nano (which normally works great for PLA), Level Bed, properly configured EZABL. I set the hot-end to 240, bed to 65, fan 0 on layer one and 60 for the rest. It's kind of stringy but the first layer goes down pretty good. It's been failing at layer 2 or 3 when it comes off the bed. Tried both Cura and Simplify 3D. I thought I had something going with S3D, it lasted the longest and went down the smoothest with the S3D profile. Setup is a Ender 3v2 with EZABL, Creality DD, TH3D firmware. Zero issues with PLA. What I have gleaned from is the temp tolerance and cooling are way more important with PETG so any help would be appreciated. I'm trying to print the base form my Petsfang Blokhead in PETG. That's the right thing to do I'm thinking?? I did the duct in PLA.

DocB_rown

I had success in slowing things down in PETG or going next size up in nozzle diameter (0.6).

staticlinerich

DocB_rown Interesting. I might try that. For know I just want to print this dang part for the Petsfang Blokhead. Micro Swiss extruder coming in today and I'd like to get that up and running.

staticlinerich

So far so go on this (4th) attempt at a PETG Temp tower. I slowed it way down and used a brim instead of a skirt. Also went up 10 degrees on the bed. Seems to be holding for now. Usually comes off the bed around the 3rd or 4th temp change. If I can make it through this I'll set the hot end temp based on this tower and run the retraction tower and them a cube.

FilamentOnFire

I had trouble with PETG at first as well, but finally got it dialed in. Now it sticks great, and usually self removes when completely cooled. Of course every printer and environment is different, but for me this is what works in Cura with Atomic PETG:

Nozzle: 245
Bed: 75-80
First Layer Width: 110%
First Layer Flow: 120%
First Layer Speed: 20mm/s
Fan: 25% (Off on first layer)

Use skirt to babystep your z-offset until you have the perfect "squish". From there the only thing you'll have to worry about is stringing, but that's always a challenge with PETG. I really like Atomic's CF PETG as it strings less and produces strings parts.

Tombstone

Thanks for sharing. I picked up a roll and one day I will give it a whirl. I dont have a project in mind yet just wanted to try out a few different filaments.