PETG is just as stringy as I was told

PETG is just as stringy as I was told

Yikes. Gonna have to work with this material a bunch to learn how to use it.

Cali Cat - The Calibration Cat by Dezign

Cali Cat is designed to be the purrfect initial calibration and benchmarking print. It is a simple, standard test to ensure you have the basics down before proceeding to advanced prints. Cali Cat is the alternative to boring calibration cubes.

^Thingiverse

in reply to mooklepticon

faebudo

in reply to mooklepticon • 3 days ago • •

Your first step will be learning to dry it and keep it dry. I can recommend a scale that can resolve to at least 0.1g so you can measure the weight loss while drying. This will help in seeing when it's sufficiently dry (put it in dryer and weigh it every hour) and if it took moisture again.

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in reply to faebudo

RamblingPanda

in reply to faebudo • 3 days ago • •

And the surface quality will be enhanced with dry filament.

in reply to mooklepticon

BigDanishGuy

in reply to mooklepticon • 3 days ago • •

First rule of PETG-club is "dry your filament", second rule of PETG-club is "dry your filament"... Thrid rule? Nope, it's "store your filament dry"

Jokes aside, other things you could look at:
* nozzle, how worn is it?
* calibration tests: did you do a temp tower? Calibration cube? Retraction test?
* The vertical surface doesn't necessarily have that appearance as a result of wet filament. In my experience, wet PETG will result in more random variations than that. It looks too regular IMHO, is everything that should be tightened actually tightened?
* have you calibrated the extruder steps?

Tato položka byla upravena (3 days ago)

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in reply to BigDanishGuy

SzethFriendOfNimi

in reply to BigDanishGuy • 3 days ago • •

Fourth rule… painters tape as bed surface will save your PEI sheets and holds PETG really well.

Or G10/Garolite

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in reply to SzethFriendOfNimi

Marvelicious

in reply to SzethFriendOfNimi • 3 days ago • •

I pop my PEI bed with finished print into the freezer for about 5 minutes. Pops right off, every time. No tape, no glue, I just wash the bed with soapy water between prints.

in reply to SzethFriendOfNimi

bluewing

in reply to SzethFriendOfNimi • 2 days ago • •

Or just use a textured PEI plate at the proper bed temperature. There is very little need for special adjuncts to print PETG.

in reply to BigDanishGuy

bluewing

in reply to BigDanishGuy • 2 days ago • •

I would bet on retraction here. Dial that in and 90% of the stringing goes away.

in reply to mooklepticon

Schmaker

in reply to mooklepticon • 3 days ago •

Just printing my first #PETG on #Ender

70°C bed
260°C nozzle on the bed
225°C nozzle afterwards

The difference from defaults is huge 😀

Edit: I also attached a pic, but for some reason it did not federated. Let's try a link then schmaker.eu/photos/schmaker/im…

Picture from the 3D printer bed where on the left is crazily stringing calibration print while on the right is pretty nice print almost without strings

Fotky na zdi

^schmaker.eu

Tato položka byla upravena (3 days ago)

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in reply to Schmaker

mooklepticon

in reply to Schmaker • 3 days ago • •

260°C nozzle on the bed
225°C nozzle afterwards

Wow, that's a huge difference between 1st layer and later! I've never seen that big a delta.

in reply to mooklepticon

Schmaker

in reply to mooklepticon • 3 days ago z Fedilab •

@mooklepticon
I think my Z-offset is too high and I'm compensating it with temperature, but I don't care - nozzle cleans itself well, prints well and even structure is good.

When it works, don't touch it 😀

@mooklepticon

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in reply to Schmaker

spitfire

in reply to Schmaker • 2 days ago • •

I generally print first layer at 260/250 and the latter ones 10 degrees colder. I do the same with the build plate - starting with 90, and leaving it at 80 throughout the ret of the print. With some plates you have to bee mindful of PETG sticking too well (possibly damaging them) but it works out really well with PET/PEO plates, letting the print retain the texture of the build plate. On PEI I either print it cooler, or use glue (in this case it makes it easier to separate the print from the plate).

in reply to spitfire

Schmaker

in reply to spitfire • 2 days ago •

When I fine-tuned my settings I got a lot of stringing until I reached 225°C for some reason. Maybe it's vendor-specific 😀

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in reply to Schmaker

spitfire

in reply to Schmaker • 2 days ago • •

Maybe you should try thoroughly drying it, that helps a lot with PETG.

in reply to mooklepticon

Imgonnatrythis

in reply to mooklepticon • 3 days ago • •

Honestly you are off to a pretty good start. As everyone will tell you, you need to keep this stuff really dry. If that still doesn't work, try different settings. If that doesn't work, try a different brand. Unlike pla that is pretty forgiving on manufacturing tolerances, I've seen big differences in quality with PETG.
In my hands, Id consider your kitty a perfectly acceptable print. Butane torch the hairs and you'll have a perfectly clean model

Edit: also play with avoid crossing perimeters settings.

Tato položka byla upravena (3 days ago)

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in reply to mooklepticon

Siff

in reply to mooklepticon • 3 days ago • •

I print almost exclusively with PETG and what I have found that works for me is to dry the filament, even if coming right out of the package. With some filaments, decreasing the nozzle temperature also helps.