The printer is assembled. I made my first print. The 3DBenchy seemed OK. After that I wanted to print a cube 20x20x20. The print was ok, but when I measured the cube it was 16.3x25.14x20 Only the z-axis seems OK. I used the default Marlin configuration : x steps per mm : 160, y steps per mm : 180 and z-steps per mmm :1600 What caused the difference ? Should I modify the configuration ? Or is something in the assembly wrong ?