I accidentally got the PETG filament instead of the PLA which I normally work with. I have an Elegoo Neptune 3 Pro.

Here’s what was weird:

• The test strip went across the bottom of the board instead of the side. It went back to the side when I put the PLA back in.

• The temperture melting point changed automatically from 200 F to 220 and then back again when I switched back to PLA.

Does the printer know what kind of filament I’m using and if so, how?

ETA: The filaments have all been the Elegoo brand filaments.