3DPrinting
3DPrinting is a place where makers of all skill levels and walks of life can learn about and discuss 3D printing and development of 3D printed parts and devices.
The r/functionalprint community is now located at: !functionalprint@kbin.social or !functionalprint@fedia.io
There are CAD communities available at: !cad@lemmy.world or !freecad@lemmy.ml
Rules
-
No bigotry - including racism, sexism, ableism, homophobia, transphobia, or xenophobia. Code of Conduct.
-
Be respectful, especially when disagreeing. Everyone should feel welcome here.
-
No porn (NSFW prints are acceptable but must be marked NSFW)
-
No Ads / Spamming / Guerrilla Marketing
-
Do not create links to reddit
-
If you see an issue please flag it
-
No guns
-
No injury gore posts
If you need an easy way to host pictures, https://catbox.moe may be an option. Be ethical about what you post and donate if you are able or use this a lot. It is just an individual hosting content, not a company. The image embedding syntax for Lemmy is 
Moderation policy: Light, mostly invisible
view the rest of the comments
PETG will not, the glass transition temperature is 80-85C. For PLA it's 55-60C, so those will go floppy if you go at full tilt, though you should dry PLA at 40-50c-ish.
PETG will creep even at temperatures below 80°C and the higher the temperature is the faster the process is: https://en.wikipedia.org/wiki/Creep_(deformation)
I have a small collection of parts that all experienced creep (as a showcase). Structurally they where all fine in simulation and practice. Over time they all failed due this deformation.
So does PLA, both materials are amorphous polymers so they are never "truly" solid unless they are frozen - nor are they really ever molten either. That is why screws and bolts etc always seem to "work" loose on 3d printer parts - they don't, the material just flows away from them.
It's just that at the glass transition temperature is when they go from slowly getting softer the hotter they get to suddenly completely rubbery and floppy.
Got it, so I should be safe if I print it in PETG. Thanks!
Yeah, PETG or ABS/ASA would probably be my go-to. For what it's worth, I'm pretty sure basically all commercial plastic spools are injection molded out of ABS.
Use ASA. PETG will creep.
ASA will creep significantly less. If you have fibre-filled materials they also excel in this regard but are probably overkill here.