Need help with PETG printing

[jteberle 0]

Folks;

I need some assistance/knowledge on how best to print with PETG. I have tried at 210 and 220 degrees Celsius and I still get a bunch of strings and little pieces breaking off. I am enclosing a picture. Any ideas on how to get a smooth finished product would be greatly appreciated. Thank you in advance.

[arj3090 2]

I'm running my first test of Ultimaker PETG. The temperature is 240 with a 0.4 nozzleand so far it looks good.

[bradk3 14]

Have you started by printing a temperature tower and retraction towers (distance and speed)?  That would be a good first step.

 

I've recently played with settings for PETG in Cura and have it dialed in pretty well for my Anycubic I3 Mega (with a Bowden extruder).  I can't remember everything I tried, but I'll go through the settings I can remember.  Your mileage will almost certainly vary.

 

Finding the right temperature and retraction settings helped. 

Printing Temperature: 250 C

Retraction Distance: 6.0 mm

Retraction Speed: 40 mm/s

 

Speed seemed to play a part in it for me - specifically, printing slowly.  It's agonizing, but it works.

Print Speed: 40 mm/s

Outer Wall Speed: 30 mm/s

 

Playing around with combing also seemed to help.  Specifically, the following settings:

Combing Mode: "Within Infill"

Max Comb Distance Without Retract: 8.0 mm

 

I hope some of that helps.