Stepper motor tune-up aid

I ran in to the issue with 3DBenchy. The cabin walls got the diagonal stripes with 0.1 &0.05 mm accuracy. (You'll find the phenomenon called as 'Zebra stripes' or 'Moire')

The reason is that our stepper motors aren't rotating full steps but electronically created fraction of the steps, (microsteps) e.g. 1/16. These are not accurate especially near the motor's full step area. Holding in to those depends about the current feeding in to the motor.

The phenomenon is visible when motor needs to