Attached is a copy of a schematic for my 80Watt Laser. I have upgraded the X and Y axis stepper drivers from HY-DIV268N-5As to GeckoDrive G213V. The wiring of the G213 to the AWC608 is a little unusual. The G213 does NOT include GECKODRIVE's circuit that auto routes the common/5v to the optical isolator. So you have to connect the COMMON for the STEP and DIR to the AWC608's GND. I made a cable harness that ties the GNDs to the G213s close to the AWC608 so it looks cleaner.
The G213s make the stepper motors "Sing"...Yes, they sound good!!!!
If you have any questions, feel free to ask.
My laser can be seen at
http://www.timsmachines.com