Having trouble printing with PETG

Ender-3 V3 Printers Creality Ender-3 V3 Plus
1

I just started printing with PETG. I am using the Generic PETG filament settings from Creality, but my prints are failing. On the first layer, the prints fail to put an even layer, and then as the nozzle passes by, it rips the area away from the bed.

When I finally did get a good layer down, as it started to lay down the infill cross hatch, subsequent passes shred the previous. Here is an image of the destruction.

20260512_150719
20260512_1507191920Ă—1440 215 KB

I am using Hatchbox PETG. I feel the parameters are not correct, but not sure which one. Does anyone have any advice or the parameters that work best for this filament?

Any assistance would be greatly appreciated.

2

Hi!

Using Generic settings is not always a good way. The best way is to calibrate your filament with the slicer: Calibration Tutorial | Creality Wiki. Do all the tests and follow the steps to adjust the parameters :slight_smile:

Best regards!

1 Like
3

… why calibrate filament? In all the years I do 3D-printing I have never calibrated filament…

PETG is not that easy to print as PLA… If the filament is in bad conditon (read: WET) you will get bad prints. Generic profiles are there for those who don’t know how to create their own profiles. They are absoluletly not bad but sometimes you have to change a few settings like temperature and flow…

So start with drying your PETG-filament and check some settings of your Generic PETG-profile, up the temperature a little and make sure cooling is off…

And stop using GRID-pattern as infill… it’s the worst infill pattern there is…

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I use a filament dryer. I would create my own filament profiles, but I was hoping someone else may have gone though what I am and would have some settings I could try and save myself days of fiddling around. Does nozt look like people are that giving. Oh well.

5

Hello !
I think you have two issues here :

  • A speed which is maybe too fast. Check the “Max volumetric speed” (material profile). By default, it is generally 12 or 13mm3/s and that is way too fast for some brands. I would recommend to reduce it at 7mm3/s (at first)
    That’s the one change I did in my “GENERIC PETG” profile and that fixed it nearly all of my issues.

  • A filament full of humidity. PETG is not as bad as TPU but it sures loves humidity. A few hours in a dryer would fix it.