How-To: Build your own CNC machine (Part 1) {Engadget}

Mar 10th 2007 4:09PM Hey Nathan,

My goal is to make injection molded parts. Step 1 is to make a CNC machine; Step 2 is to make an injection molding machine. I need a CNC that can operate on a 12" square bed to make an 8 cavity mold. No commercial desktop CNC as far as I can see can do this (Lightmachines has a 12"x7" bed). In your opinion, can I make a durable/accurate desktop machine with 12"x12" travel that can cut tool steel (or at least aluminum)?