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You could try this mechanism (please pardon the mspaint drawing): Notice how the inner shaft has to rotate more than 360 degrees to hit both limit switches. You can use multiple stages to get more rotations.


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There are many options: a gearbox multiturn potensionmeters convert rotational to linear motion through a screw digital encoders (absolute or incremental) If you need less that 5 or 6 turns you can use a gear box with a single turn stop. The gear box will reduce 5 turns to 1. Regarding the use of multiturn potensiometer, IMHO is a viable option. The added ...


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