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Could you give more info on the "continuous-rotation pot?" Does it have a dead zone?
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From Digi-Key....made by Bourns. 6639S-1-103-ND
My controls engineer may have to clarify, but I don't recall any dead band. They simply rollover at the zero point.
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I'm assuming the actual tensioner pulleys are like a black delrin? If so, have you had any issues with wear and tear on them in your findings?
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This unit has low hours, but I'm planning to see some wear over time. The black delrin rotates quite smoothly on the aluminum cam. This rolling action helps minimize wear.
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How did you machine it with the guide grooves?
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These pulleys were made on a simple lathe with a parting tool.