Try turning the pots over their full range a few times with the power off. With luck this will improve the contact and give you a smooth adjustment from 0V to whatever the maximum is.
I much prefer to use controller electronics with software-adjustable stepper motor current. It makes things so much easier. Electronics novices should not be required to adjust pots while reading voltages on a meter.
I much prefer to use controller electronics with software-adjustable stepper motor current. It makes things so much easier. Electronics novices should not be required to adjust pots while reading voltages on a meter.