Grinding sound when starting print
I have a mars 4 ultra and it makes this sound when I try to start printing. Then it stops and says "file error".
I have tried leveling with a thicker paper, setting the z offset higher than normal, tightening the plastic sheet.
Even though it was dumb I tried leveling it while resin was in, but then the rest print didn't even stick to the plate.
I've gotten several successful prints with this machine before, this started happening out of nowhere.
I'm wondering if it may need to be lubricated? In which case I would also like to ask if the bottle of 3-in-1 in the back would work?