engraving

[JAZZCNC]

Ok then easy job.
These motors are nema 23 but they have quite high inductance at 9.5Mh. This means the voltage required to run these motors at there best is quite high.! Around 100Vdc if wired bi-polar parallel or approx double this for series connection.
Personally I'd dump the motors and use something like these SY57STH51-3008B from zapp at £19. They will be much better, more powerful with double the holding torque and need less powerful drives PSU etc.
They would be fine run on 30Vdc drives but the ideal setup would be 50V 4.5A drives with 42Vdc supply. The extra volts will give good speed and the drives will be working within a nice tolerence of there limits so not stressed improving life span. It would also give some flexabilty for future upgrades with bigger motors or transferable to another larger machine.

You will also need a breakout board (BOB) to easily connect everything together. There are loads of these 50V drives and PSU BOB setups available on Flee bay at resoanable money.

To activate the cutter servo then it's just a simple case of using an output signal controlled by MACH to engage/disengage the servo via a relay from the BOB. This can be done using the command that would normally be used for turning the spindle off/on M3/M5.

Micheal Marino as a board and motors for sale that would do what you need, all be it at a slower speed with slightly less power, give him a shout.
You can see it here. http://www.mycncuk.com/forums/showth...ling-shed-sale