The video shows devices, messy electrical wiring and brass machining. Drive system gets step/dir signals from parallel port, But others input output rely on PoKeys57E with Pobob.
The customer chose to use PWM analog from PoKeys57E/PoBob rather cheap BOB because it gives better analog signal .
PoKeys57E/PoBob, This duo can do almost everything except catching index pulse for threading.
http://www.youtube.com/v/udTrxT8sQfc?hl=en_US&version=3&rel=0Edit: fixing video