Stepper Motors
here is some code to get stepper motors working with pduino.
download it here
you need a stepper driver ( like the 2 pin EZDriver or A4998, or a 4 pin one such a ULN2803) and configurable firmata on an arduino to use it.
download the arduino code onto your machine by using manager libraries in the arduino app
then searching for configuarable firmata
set up the arduino and driver this way.