Hey guys,
I was having fits trying to cut things on my MPCNC from a Mac. I have the RAMPS 1.4 kit from @allted but it was not happy with router operations at all. It is very geared for 3D printing as already mentioned.
Since I have a nice Lulzbot 3D printer already, I bought this GRBL controller from Amazon, threw it on an Uno I had lying around and swapped it out for my Mega/RAMPS. NO CHANGES NEEDED to the wiring of the MPCNC, even with end stops. Just plug it into the GRBL shield just like the RAMPS 1.4 shield. My MPCNC runs great on it and best of all - WORKS GREAT WITH EASEL!!!
In Easel just set up the MPCNC (with a GRBL controller) as a Shapeoko 1 or 2. You can just select the 1000mm x 1000mm option in setup, then change the work area size to match your MPCNC (Mine is 1200mm x 690mm) in the current project. Easel will remember these settings if you are logged in. My plotting tests with a Sharpie from Easel + GRBL shield worked great the first time. The only tricky part is flashing GRBL 0.9 onto the shield, but just follow the GRBL instructions from Github in the readme file and every thing will be fine. In the meantime, here is a link to a video I posted of the MPCNC running GRBL controlled by Easel on a Mac.
I am printing router mounts for my Craftsman router today and looking to test carve a design tonight. Finally I have a CNC Router running from a Mac!