Zach Radding and his daughter Taylor with some robots he built using his own CNC laser cutting machines.
Check out http://www.buildcoolstuff.com/
to see more of his projects and info on the classes he teaches.
He's built two laser cutters so far.
Click on the little numbered pictures above to learn more about them.
Note: These are not fully detailed plans.
Included are part numbers of all the major components. If you have already built a CNC machine of some sort,
this information would help you adapt it for doing laser cutting. You should build a CNC router table before attempting a laser cutter. The book "CNC Robotics" from Tab books has good plans.
www.nutsvolts.com used to send you plans for two cnc machines with a subscription.
Zach recommends http://cnczone.com/
for homebrew cnc info. He likes Dancam cnc software.