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YES ! Your Servo Tester Controller is a GREAT idea. I do not want to spend the $$$ for an RC controller to run my camera Pan/Tilt platform. Thank You for a super instructable ! Richard
Medium sized DIY - CNC 20" x 30" work area
One way to at least reduce the cross-grain chip out is to consolidate (impregnate) the fibers of the surface if the dowel with a heavy, saturating coat of thinned polyurethane before starting to cut the spiral. Wipe off the excess after it has time to be absorbed and allow to dry thoroughly. Lacquer based sanding sealer, shellac, or even slow-set epoxy thinned with lacquer thinner will also help to solidify the wood fibers. add an oil based stain to the liquid will give a contrasting color to the surface wood too.
Harari - Great article and SUPER photos. No guessing needed !