I found the following formula for setting the scale:
For "scale" i use "40" since i have full step drives connected to 200 step/rev
(1.8 degre/step) motors attached to 5mm/rev ballscrews. This is simple
math: steps per rev/mm per rev, in my case 200/5=40.
Where did you find that?
That looks like something i wrote quite a while back, so if the math at the end is wrong i would like to correct that.