Stepper Motor Tuning

After installing a new MKS Base motherboard some prints came out shifted...in particular the larger and more complex prints, and combined prints...very frustrating!

I remembered that I had this problem before and it had something to do with the stepper motor..not the slicing, not the memory card, not the power instability :-)

For future reverence I post this installing addition.

The voltage is measured between the USB casing and the stepper motor potentiometer.
I currently set the pote