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Originally Posted by cgmv123
Know how many revolutions your wires can handle, keep track in code and quickly turn the module to unwind the wires when needed.
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Given the budget and wire winding/unwinding problem, would it make sense to simply limit the motion to 180 degrees, and reverse wheel direction as necessary? The issue I see here is that there will likely be some very jerky motion when crossing over the 180 degree mark, when the wheel direction has to reverse. I believe this has been attempted before, though I'm not sure to what degree of success.
Additionally, I think doing this would allow us to use a cheap potentiometer. I'm just not sure if a cheap potentiometer will be accurate enough for position sensing; I've heard mixed reviews about the linearity and accuracy of cheap pots.
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Originally Posted by Gdeaver
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Thank you for the suggestion. With this, if I'm not mistaken, the encoder will simply modify its output voltage based on the position of the shaft, and the voltage, when mapped between 0 to 360 degrees, will result in a resolution of roughly 0.088 degrees?
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Originally Posted by jman4747
You might start here ...
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Unfortunately there isn't anything we can do about the budget. However, a couple of the places you pointed do seem to have cheap options, but that probably means they're a little featureless. I'll check them out though, thanks for the suggestions.