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Messages - Propagandalf

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General Mach Discussion / Probing for XYZ in Mach on a mill help
« on: September 01, 2017, 02:18:55 AM »
I'm looking for a way to use G31 to find XYZ on a mill with a metal work piece. I tried to rig up a simple 3V circuit outside of mach with a LED connected to a known diameter rod in the spindle and the work piece (aluminum). Thought process being when the rod touches the work piece the light comes on. I quickly realized that since the entire machine is metal this does not work since when you connect both alligator clips the circuit is complete instead of being complete only when the + rod touches the - workpiece. All my Google shows people achieving this on router tables where a short is created since the table or work piece is wood. Can this be pulled off in Mach on a metal mill? I have a touch probe,  but because of deflection it can't be repeatable.

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