I recently started swapping out my nozzle for different sizes. After a few times using a 0.4 mm, then 0.8 mm, then back to 0.4 mm, I now have this "clumping" going on when printing. The photos are of PLA but this happens with PETG also. Before I started changing nozzles, my prints were perfect.
The blue filament is Overture PLA, printing at 45 mm/s 210 °C (I lowered the temp to 200 °C and it's still happening).
Some things I've noticed (which did not exist when my prints were good):
Melted filament on the rubber piece that covers the underside of the extruder. Could something be backing up, melting, and then falling in a clump on top of my print?
The bottom metal piece on the extruder is slightly loose. It's the flat piece attached to the main extruder body with two screws. I don't know what it's called, so I couldn't even search for how to tighten it.
- Does this "clumping' have an actual name?
- What did I potentially do when swapping nozzles that could have caused this (if that's in fact how it started)?
- How can I fix it?
The print stopped and I removed the shroud. My train of thought was spot on as I saw a pool of blue PLA inside the housing and on the nozzle. But I still don't know how this happened.