What if in a mad moment of irrational creativity you went to all the junkyards around and bought up all the various fly wheels and gears you could find of same tooth size and took them home to build a giant spiro-graph like you use to have as a kid only now your toy has graduated to metal and instead of a pen and pencil making lines on paper you’re new spiro-graph makes its lines in wood with a router attached. Does this seem like a workable possibility?
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I think you, and/or your idea, is a candidate for "The Junkyard Wars."
Measure it with a micrometer, mark it with a piece of chalk and cut it with an axe.
...Wear eye protection...
Newf Cape Breton, Nova Scotia
Carpenter, woodworker, gardener, Can't sew or cook
FWW had a short feature once about a braided inlay in an elliptical
table top. The grooves for the inlay were cut with a router running
on some kind of machine. They didn't have a picture of the machine,
just the inlay. IIRC the text mentioned that the machine was like ####spirograph.
I couldn't find it in the article index (There are a lot of entries
under 'inlay.'), and I can't even remember approximately when it
was, except that it was after they started printing in color. But
anyway, now you know of an existence proof. I say, go for it.