I posted this in the X3 forum, but I think it has more general appeal since everyone doing a conversion has to deal with the electronics portion.
3+ years after starting my conversion, I finally got around to packaging my control electronics properly. My approach is a bit different to those I've seen here, so I thought I'd share.
I put together a rather long video that goes through the details. Hope it's informative and inspiring! Just trying to give something back for all of the inspiration I've gotten from the 'Zone over the years.
[ame=http://www.youtube.com/watch?v=zz0gd3TS0LM]Electronics Overview for X3 CNC Mill Conversion with LinuxCNC and Mesa FPGA Card - YouTube[/ame]