My small cnc is powered by Arduino GRBL shield and the work area is good enough to mill 4 pcb's for my smart watch project. Most electronic modules in the market today are small and always uses smd components that is why this cnc is really perfect for most electronics design studios.
Actually I've had the cnc for quite sometime now but I am still not able to operate it to create an object but I was able to test to mill a square with success just to test its accuracy because I am busy designing the enclosure, and the dust collection attachment which are must haves and very important components of the machine and the reasons are obvious, the enclosure will protect the machine from harshness of the environment while the dust collection attachment will keep the interiors clean when using it. Too much dust inside can really harm the machine.
Here are some of the pictures of the cnc: