Linkogram drawing machine

This machine is one of seven, each making quite different drawings. A number of my machines can draw with light onto a digital camera. I plan to video them all in action and am happy to share the details with anyone interested.
The Linkogram is similar to a Harmonograph, but does not rely on pendulums, instead a system of cams, gears and linkages make the images, hence the name Linkogram. All the drawings are referred to as Taitographs, and I have a web site giving more information - web.mac.com/jacktait.
The drawings made with my machines and their use in studying the creative process is currently the subject of a PhD at Manchester Metro University.