Shapeoko

http://www.shapeoko.com/ and https://www.inventables.com/technologies/desktop-cnc-mill-kit-shapeoko-2

http://makezine.com/2012/03/21/makerslide-prototyping-3d-tools-made-easier/

http://makezine.com/2013/10/21/shapeoko-2-milling-machine-launches-todayy/

http://www.shapeoko.com/forum/viewtopic.php?f=6&t=1053&start=20#p10799 usb isolation