My experience with this PETG
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I have this PETG; its Kingroon Blue PETG. I can’t get it to print nicely no matter what I do. Been testing with benchy over and over.

The filament is as dry as I can make it. It’s been in the dryer for at least 12 hours before each print. I even have tried snipping the part of the filament not in the dryer to start from a dried state. The Relative Humidity doesn’t drop anymore at this point (from 19ish).

I’ve tried different temperatures from 220 to 260. I’ve tried different retraction lengths and speeds. I’ve tried with the cooling fan on/off and at a couple middling percentages. Also different speeds from 30mm/s to 45 to 60.

I tried printing a retraction tower and it fell apart after the first level.

The first layer prints more/less fine, then eventually it either just falls apart (most of the time) or produces something in awful quality.

I’ve attached images of everything I can think of from the way it looks on the first layer, to the case where its a benchy out of a horror film, to when it just fails miserably.

Printer Elegoo Neptune 3 Plus. .4mm nozzle (i’ve tried both copper and hardened steel). Besides the nozzle its stock. If I swap to PLA it prints generally fine.

I feel like I’m missing something obvious. Everyone says dry the filament, but I can’t dry it anymore 😢 .

Thanks folks (and if you celebrate: Happy Turkey Day!)

  • csm10495@sh.itjust.worksOPEnglish
    21·
    2 days ago

    I instead tried printing directly from the spool holder immediately after taking it out of the dryer. Same thing happened. I doubt it could have moisture-d up that fast for it to make a difference

    • csm10495@sh.itjust.worksOPEnglish
      1·
      2 days ago

      For good measure I tried going direct from the dryer to the hot end (and just left a piece in the runout sensor to have it not trip). More/less the same problems: https://imgur.com/a/65jzAQv … I stopped it early since it was failing terribly. Otherwise was using default cura generic PETG settings on .3mm per layer with .4mm nozzle.