woodworking ellipse jig
This jig is one of those anonymous acts of genius. how in the world did somebody come up with such a neat idea? you spin an arm around and around, and instead of tracing a circle, it outlines a perfect ellipse. wow. old mechanisms like this were used by woodworkers to draw an ellipse with a pencil or stylus, which they would then cut out by hand.. Varying the distances of the nails on the stick/ply will make the ellipse taller and/or fatter. this is a precision way to make repeatable ellipses of the same size. you can make this jig as small or as large as you need it. the best way to make the slots is with a dovetail bit or similar. that way, the moving blocks can't escape the jig.. In this video i show how i build a shop made oval cutting jig for your router. this for use in an upcoming project where i needed to cut an elliptical top for a table..
Ellipse drawing jig|autodesk online gallery
Ellipse router jig - finewoodworking
woodworking ellipse jig
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