Quote Originally Posted by m_c View Post
if you have a suitable spare galil lying around, then its a very valid option, but galil boards are not that cheap.
I've seen step/dir to +/-10v interfaces mentioned, but can't remember ever seeing one that's commercially available.

If you did want to run analogue servos, a CS-Lab Csmio/ip-a, Dynomotion Kflop+Kanalog, or whatever the Mesa analogue output board is, would be far better options.
Looks like this will do it, but I'd have to build the rest of the circuit (probably too much for me) - http://www.uhu-servo.de/servo_en/index.htm

This looks like a ready made solution but with shipping etc it's probably cheaper to ditch the drives and start again - http://www.rutex.com/us/index.php?productID=126