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.

<a href="http://www.youtube.com/v/udTrxT8sQfc?hl=en_US&amp;amp;version=3&amp;amp;rel=0" target="_blank" rel="noopener noreferrer" class="bbc_link bbc_flash_disabled new_win">http://www.youtube.com/v/udTrxT8sQfc?hl=en_US&amp;amp;version=3&amp;amp;rel=0</a>

Edit: fixing video