Here is a screen shot of the cnc wire cutter that I'm building. It's drawn in Google Sketchup and based on a design by Blueswede from the yahoo cncfoamcutters group. It uses drawer slides and acme threaded rod and is all out of MDF.

I'm slowely building this thing (heavy emphasis on slowly). Really if I had a free weekend I could knock out the MDF on the table saw, it's just getting a free weekend that's tough with 3 sons.

Steve