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I've read in several places that using back off speeds and clean nozzles can help. I'm running with a new nozzle. Travel speed 150, retraction speed of 20, print speed 50. I think some of these are just defaults with cura 5.4 but I get the same thing with a higher retraction speed. What else should I look at?
I have posted this before but I have had PETG do all kinds of weird things when it is wet so maybe you should try drying it out and seeing if that helps. I have had it string before using the same settings that were fine previously just because it had too much moisture (drying the same spool out made it print fine again).
Have you printed a temp tower? PETG is a pain, i usually just hit it with a heat gun afterwards to get rid of the string.
This is a good idea since I need a heat gun for soldering
Maybe try to reduce nozzle temperature?
Interesting, I'm printing at 245
That's a bit hot... All PETG I've come across so far printed OK at 230.
If you don't mind slightly longer print times, activate "Avoid crossing perimeters". It doesn't fix the stringing on travel, but it tries to put travel moves inside the model. It generally improves print quality by a huge amount.
First, dry your filament, that is almost certainly the main source of the problem. Second, increase your travel speed by a factor of 5.
Controlling for other settings, I find petg strings pretty badly when the filament isn't dry. I'd really recommend trying dry filament and/or drying yours out. Petg always seems to string a little in my experience, just not to that level
Maybe your nozzle is too hot or your filament is wet (although it does not looks wet).
Try set a lower nozzle tempereture and drying your filament.
Also, I suggest to print a temperature tower to see what's the best fit of this filament with your printer
I hadn't heard of the temperature tower, thank you
Yeah mate thats super usefull 1st print for every new filament. Temp tower, flow tower, retraction tower and you are set.
Btw calibrating retraction is not just changing speed, you need to find speed and distance. But yeah like others said, your petg probably needs to be dried first