Today I decided to switch gears and setup a little circuit that would test all the components (2x stepper motors, input mechanism, screen, brain) that I'll need for the plotter. This was the result - a joystick that can increase, decrease and reset values; a screen to display the current value; and a stepper motor to position itself (0 = start, 100 = half turn, 200 = full turn) where that value is.