Help connecting servos to breakout board Mach3

[Ger21]

I've seen step/dir to +/-10v interfaces mentioned, but can't remember ever seeing one that's commercially available.

http://032c30a.netsolhost.com/catalo...products_id/56

$90 each.

And here's an open source design:
http://www.cnczone.com/forums/open-s...10v-servo.html