During my Friday's visit of the Ars Electronica Center in Linz, Austria, I have seen an interesting, mechanically simple machine drawing complex curves - guilloches: A similar machine at work: As we have received a lot reactions and feedbacks on the 3DPlot utility we released in February 2012, I have decided to use a similar principle and make a "guilloche-engine" in AutoCAD. My firstGo to the original post...