Potentiometer and Motor Trouble

[Mr.Macdonald]

I am trying to set up a motor with a potentiometer to act like a servo. I have another potent controlling the desired location. I can make the motor turn one way correctly but it jitters when going the other direction.

The potentiometer on the motor in magnetic and have infinite rotation, the controller in a normal potent.

My algorithm goes as follows.

PHP Code:

pot_0 = controller potentiometer
pot_1 = on motor
mot_0 = motor

mot_0.Set( 10 * int( (pot_0.value() - pot_1.value())/10 )/1024) 


the 10's allow for error. 1024 is potentiometer max.