That’s good to know, maybe I’ll give it a go then 👌
Comment on Ender 3 V2 damage?
KingRandomGuy@lemmy.world 1 week agoPETG will almost certainly be fine. Just use lots of walls (6 walls, maybe 30% infill). PETG’s heat resistance is more than good enough for a non-enclosed printer. Prusa has used PETG for their printer parts for a very long time without issues.
Heat isn’t the issue to worry about IMO. The bigger issue is creep/cold flowing, which is permanent deformation that results even with relatively light loads. PLA has very poor creep resistance unless annealed, PETG is a quite a bit better. ABS/ASA would be even better but they’re much more of a headache to print.
beastlykings@sh.itjust.works 1 week ago
remotelove@lemmy.ca 1 week ago
Totally. There is heat from repeated deformation, but I didn’t explain how little heat it was, so I clarified in a later comment. All motion creates heat, etc, etc. (TBH, I shouldn’t have mentioned it. Oh well. I let that cat out of the bag, so it’s too late.)
But also yes, I have experienced PLA “cold flowing” on some parts as a well so I can confirm that for sure.
KingRandomGuy@lemmy.world 1 week ago
All good, it’s still something to keep in mind (especially if OP thinks about enclosing their printer in the future). Thanks for your comment!
bluewing@lemm.ee 1 week ago
Infills over 10 to 15 percent get you very little increase in strength. It’s not until you get to the sweet spot of 80-85 percent infill rates do you get a real boost in strength. Then above about 85% the gains again taper off dramatically all the way to 100% infill. Otherwise you are merely wasting filament and money to just feel good. If you need more strength, add more perimeters and tops and bottoms.
I would use a .60mm nozzle, PETG or PLA will work just fine, 4 perimeters, and 4 top and bottom layers. And either 10% cubic or gyroid infill. That should create a part that will last for years.
beastlykings@sh.itjust.works 1 week ago
Thanks!
KingRandomGuy@lemmy.world 1 week ago
In my experience doing a bit more than 10% can be helpful in the event of underextrusion, plus I’ve seen it add a bit more rigidity. But you’re right that there are diminishing returns till you start maxing out the infill.
4 perimeters at 0.6mm or 6 at 0.4 should be fine.