I just thought I would sound off, on what I have been working on for the past week.
I use my home built CNC Router table mostly for doing wood carvings. I work with recycled tractor-trailer flooring. Most of the time, the finished carvings are slightly thicker (or thinner, depending on the point of view) on one end (or the other). And depending on the piece carved, may actually be purposely carved thicker on one side or the other. I like to "Sign" each piece carved, with a special engraving on the backside of each piece. The inconsistent thicknesses of the carvings makes this task nearly impossible. Or at least, a very large pain in the neck- using shims, etc. in an effort to "level" the back side of the carved pieces.
So, as they say: "necessity is the mother of invention" I designed, (and have now built) a vise, which will accommodate pieces up to 24 inches wide (in the Y direction) and 48 inches long (in the X direction). This vise can be tilted in the Y direction, as well as the X direction. And the adjustment mechanism is a single knob for each axis of movement, which is locked with a thumb screw. This provides very precise control in "leveling" the piece in relation to the router bit. And it is accomplished tool-free. (No wrenches are involved in making these adjustments, just loosen the thumb screw, and turn the knob for each axis, then relock the thumbscrew).
After completion (and the first trial run to test this device), it occurred to me, that a similar design could be utlized in the actual table surface mounting. Of course, it would involve the use of much heavier-duty materials than those I used in constructing this prototype. But I think that this design could be the answer to the constant problem folks experience with home made CNC mills of the task of leveling the table. I have never seen a device which does what this thing does, and just thought that I would talk about it here, and perhaps on the Zone, to see if there is any interest. Ya'll let me know your thoughts.