Thanks for the info.
After posting this, i did a little more digging around, and realized that my initial assumption that the ED board itself could only accept that amount of current was incorrect. Your post further clarifies this.
The motors are Nema 17's rated for 1.5amp/phase current.
As for the build itself, i'm planning on using 20mm x 60mm V-Slot rails from open builds.
The configuration i'm planning will have a stationary work bed, with two 20mm x 60mm x 500mm rails on either side to support a gantry that uses a 20mm x 60mm x 500mm rail to span across the work area, and a vertical 20mm x 60mm x 100mm rail for depth.
This should give me a pretty nice work area as the X, and Y axis will have the same dimensions, and the Z axis can be adjusted by swapping out the gantry plates on either side to provide more or less clearance for the work piece as needed.
I'm also currently building a project box to house the funduino, ED's, power supply, and 2x 40mm fans for ventilation, with a custom PCB built to plug the ED's onto, the arduino, and limit switches it also has two RJ45's as output so i can keep the "brains" of the operation a safe distance from dust, debris that the machine will create.
On the machine itself, i will be placing a small custom PCB with two RJ45's, as input from the funduino box, and it will have 6x 2pin connectors for limit switches, as 3x 4pin connectors for the steppers.
It's kind of a modular approach, but i feel it's worth the little exra work to make sure the PC, and the funduino components are safe from the mayhem of potential metal chips, wood and plastics dust, and the occasional broken end mill that may go flying if i decide to drunk-dial the monstrosity
As you'll be able to see in the below images, the ED's will plug directly onto the board, and limit switches, and stepper signals are all sent through CAT5. I chose that method as it's inexpensive, and quite easy to create your own length of cables. (Note however, i did NOT consider crossed wire cables, so you'll have to make your own )
The main board also has ports for directly connecting your steppers without using the RJ45's. This is actually a vestigial feature from an earlier version of the board, but i've decided to keep them as "test" ports.
Also, to minimize the footprint of the second board, and maintain simplicity, all resistors for the limit switches are on the main board.
Here's the fritz images on the two custom boards (NOTE: They are dual layer)
Connection Board for back of CNC machine:
3Axis Easy Driver Plug-n-Pray Board: