How to calibrate X,Y and Z-STEPS?

Hi, 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

If you are controlling the printer through repetier host then you can adjust steps/mm using gcodes. M92 is used to set steps/mm for example if the Y axis is currently 80 steps/mm but you want to increase that by 10% so it will move farther then you want 88 steps/mm: M92 Y88.000 After changing it and you are happy do a M500 to save settings. If you don't do M500 it will go back to the previous value when you power cycle the machine M500 To see what the step