I am trying to get dimensionally accurate printouts with my factory-fresh UM3. During set-up, I went through the usual calibration procedures - build plate levelling with the "calibration card", and running the "Z and XY offset calibration" with the supplied "XY calibration sheet".
My prints look visually good. Print bed adhesion is excellent. I thought everything would be fine.
But then I noticed that my UM had severe issues reproducing technical models accurately. This affects dozends o