This could be “Die Swell” where something that’s cold extruded through a nozzle swells in size after it comes out the nozzle. While this is definitely an extreme example it is possible to get 2x expansion.
Check your temps and the temps of the new material.
riodoro1@lemmy.world 1 year ago
Ive seen silk filament do this when purged. The pet outer layer formed a sack and the pla inside expanded it. That being said it does look like 3mm filament from the spool.
dewritochan@lemmy.dbzer0.com 1 year ago
same, i’ve had silk pla puff up like a friggin cheeto. thought there was something wrong with it, but it all printed just fine.