I’m trying to print Marvin, and every single time happens the same. It’s like if the plastic retracts and curves itself. I guess it’s something I do wrong, not the machine, but I can’t hit the nail on what’s the problem.
I tried adding support, turning off the fans, turning off the heatbed, printing slower and faster, with different infills (even 100%, which gave not-so-ugly results).
Thee problem is that it’s not a desktop machine. It’s an industrial one. Its case is fully closed.
As for Marvin, I just changed to ABS and worked pretty well. With PLA this only happened with Marvin, everything else I tried to print came out as I wanted.