I printed a model in PETG shortly after a PLA print, which was fine, and it damaged the plate as shown. What’s odd is I’ve printed this same model with this same filament on this printer and it was fine. The temps in the gcode are the same between those prints.
Is this a Z-offset issue? Would PLA and PETG require different Z-offsets on the same printer?
Edit for more details: Creality Ender 3 V3 SE, stock plate.
From the pic it looks almost like the first layer is still on the plate, or is it etched on? I doubt it’s the latter or your nozzle would be completely obliterated (and it would’ve made a god-awful noise the entire time). Sorry for the dumb question but, are you sure it’s not just filament with incredibly strong adhesion? Does it stop a scraper if you hit an edge?
To answer your question, yes usually PETG is printed with a slight positive offset so the filament is deposited instead of squished. Something like 1/4 of the nozzle diameter
Yes it’s definitely “etched” into the textured surface of the plate, although I don’t have a microscope to confirm, it feels that way. There’s no edge to catch with a scraping tool. And you can see in the photo from my previous reply that material is embedded in the bottom of the print!
It’s possible it made god-awful noises, because it’s in a shop and because this was a “repeat print” I just set it and walked away.
Then I would suggest checking if you have filament g-code set in your slicer, I guess it’s possible the z-stop was calibrated with a z-offset applied, and when it was removed by setting PLA the nozzle tried to go slightly below 0. What firmware are you running?
It’s just the default firmware, V1.0.6.
Z-offset is set at 0 in all the gcode I’ve checked so I think it’s the printer.