PETG has always been more fraught than PLA for me but as of late it just looks like a mess.

I’m just trying to do calibration at this point and I’m getting this mess on the pressure advance test in Orca Slicer.

https://imgur.com/a/zbEn5FR

I get so much stringing, boogers, and just terrible prints. It didn’t used to be this bad. Any tips?

I’m using a Snapmaker Artisan.

  • @[email protected]
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    23 months ago

    How old is that spool? I use rapid PETG but I have noticed that print quality goes to shit quick when it absorbs too much moisture. Absolute garbage prints when they hit a certain point. Id crack a fresh spool to calibrate with and see if that remedies the situation.

    • @[email protected]OP
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      3 months ago

      It’s somewhat old but I keep them in dry boxes with silica beads and a hygrometer. The humidity never increased past 20% I believe. Usually stays around 15%.

      • @[email protected]
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        23 months ago

        Have you ever dried this filament? Silica beads won’t dry out filament, they will just keep the air in the box dry. I have definitely had to dry filament from the factory, especially PETG.

  • @[email protected]
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    13 months ago

    Have you dried your filament/ do you live in a humid climate? That would be my first guess.

    What temperature is your nozzle set to?

    • @[email protected]OP
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      13 months ago
      1. I live in the PNW but I keep my filament in dry boxes. I’ve never dried my filament.
      • @[email protected]
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        13 months ago

        Hmm, how old is the spool? Like how long has it been open? Also, are you sure that the filament and printer are rated to the speed Orca is putting out?

        • @[email protected]OP
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          13 months ago

          I’m using an Orca profile for the Snapmaker printer but other than that I’m not sure. Kind of just trusting they set that part up correctly.

          • @[email protected]
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            13 months ago

            Yeah it should be, how well did it go last time you printed Pla? There are so many things that can go wrong, just trying to eliminate some. (Drying filament never hurts so long as you actually have a dryer and don’t just stick it in the oven and hope for the best)

            • @[email protected]OP
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              13 months ago

              PLA worked fine. I just bought and loaded some new PETG btw and it prints pretty well so I think everyone is right that the filament is just really old/wet.

              Threw 80 bucks out to get a dryer.

              • @[email protected]
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                13 months ago

                Keep in kind some filament may be humid out of the box. You can try different methods of drying it for now, but I’d really recommend getting a dryer when you can.

              • @[email protected]
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                13 months ago

                Probably a good idea long term, my region is semi-arid and I still find I need it from time to time

  • @[email protected]
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    13 months ago

    Is this a new spool or an old spool? Have you printed this blend of PETG before? What does a temperature tower look like?

    • @[email protected]OP
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      23 months ago

      It’s a few months old. I have printed with it before and while it was never perfect it was never this bad. I’ll have to get back to you on a temp tower. I have one around somewhere.

      • @[email protected]
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        13 months ago

        I suggest printing a fresh temp tower. My bet is that temperature or retraction is off (have you fiddled with retraction lately) or the filament is super wet.