Quote:
Originally Posted by JamesTerm
If you used an encoder how do you ensure it remains calibrated (e.g. limit switch). I'd like to use this lead screw technique, but I haven't found reliable way to sense distance. (I have not tested the string potentiometer either).
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We used encoders with limit switches on the ends for continuous calibration purposes. It worked quite well, and was very PID-friendly because you could be off by 50+ counts and still in the "right" position.