[Bob Berg] emailed in to request that we take a look at his website. We did, and we liked what we saw! [Bob] has done a couple CNC mill conversions and documented the process quite thoroughly.
The first one listed on his site is a Sieg x-3, seen above. [Bob] explains that the first thing he did when he received it was tore it apart and cleaned it meticulously. We’re not sure if [Bob] was being insanely neat, or if he bought a used dirty unit. Either way, you can’t argue that a nice clean machine is the way to start. After a short while using it the way it was, he added a digital read out for a little more accuracy. From there, he went for a fully motorized conversion.
Keep looking around his site. There is another full build (a lather master RF45) as well as some miscellaneous other projects that are quite interesting.