Aaron wrote:

>yes they are the nc400's
>
>....do these boards connect to a pc??
>
>
Not directly. These are analog velocity servo amps, and need to be
driven by a digital to analog converter. You also need a counter to
count encoder pulses and turn that into position information.
And, finally, you need a program to convert G-code into motion
commands for the servo amps.

I make a device that does this job, see
http://jelinux.pico-systems.com/PPMC.html

Drivers for this board are part of the EMC package, which is available for
free download, or you can get a CD for $10. See
http://www.linuxcnc.org/ for more info about EMC, ahere to get it, etc.

Jon