About the Author
James Floyd Kelly
is a professional writer from Atlanta, Georgia. He has written numerous books on multiple subjects, including LEGO robotics, open source software, and building your own CNC machine as well as a 3D printer.�He is the editor-in-chief of the number one MINDSTORMS NXT blog, The NXT Step (TheNXTStep.com), where he is joined by fellow NXT experts who share their knowledge and designs with other robot fans around the world.Patrick Hood-Daniel
is a hobbyist. By day, he is an urban designer trained in architecture and city planning at the University of Miami and the University of California. But in his spare time, Patrick�puts skills from a previous career as a computer programmer to good use in building and operating computer numerically controlled (CNC) fabrication machines. He is the creative force behind BuildYourCNC.com and is well-known for designing CNC machines that can be built at low cost by normal people, without any special or expensive tools.