Here's the link to the breakout board I'm using:
http://www.probotix.com/breakout_boards/pbx-2/
Len is the guy who designed them & owns Probotix, he designed it to work with Mach3.
& here's the driver board that I'm using for all 4 motors:
http://www.probotix.com/stepper_motor_drivers/SideStep/
I'll take a look at the links you sent, thanks.
I got the X-axis working, you can see the "A" motor on the left side under the monitor, it's slaved to the X, I had found the slave setup in Mach3. I just took the chain off. "A" lost a few steps a couple times but I finally got it working pretty well, lots of adjustments on that left side (bearing preload & motor/shaft alignment). I have gotten 15ipm so far, haven't tried it faster yet, probably will step it up a little tomorrow.
Len also has a relay board there,
http://www.probotix.com/relay_boards...l_relay_board/
I'm just not sure where it would connect to the computer system, since I am using the A-axis motor where that rbx-1 relay board would normally connect, plus that Miller Spectrum 625 trigger signal is I think a 5v signal, not sure the amperage in the signal. Right now, I just have a remote wire run to a switch just like my limit switches (rated at 5A/125VAC) so I can switch the plasma on/off by hand.
Overall I can't complain, I do have nearly 48x96 cutting area & a full 16" in the z. My X is at 94.25" right now, but I can move the limit switches a little & get it to about 96.5".