Kirk Wallace wrote: > Has anyone done a jog wheel with force feed-back for detents and/or axis > load? It would be nice to have a jog wheel or quill lever to do "manual" > drilling or cutting. Do any of the current commercial CNC's have this? > > Jon, is there any test point to get a load signal from your PWM amps? > There's a much better way, and more general, too. Get a Hall-effect current sensor. Several companies make them, Murata makes a series of these that are in the $15 range, run off +5 V only, and produce a 0 - 5 V output to represent -x to +x amps, with 2.5 V for zero current. I used some of these in a project, and they work quite well to measure 0 - 6 A on that project. I didn't need bipolar in that one, but it can do it. I get them through Digi-Key.
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