you might be wondering what is the best layer height?
if you use the link below, use the pitch of 8mm and 200 steps/rev. You will find that in most of the cases the best step for Wombot 3D printers and most of the other printers that use trapezoidal leadscews is 0.04mm (40 micron).
Although I have to say that this is not that important since Wombot 3D printers use Stepstick DRV8825 stepper drivers and microstep the steps to 1/32.
check out this calculator: