I want to use this in an application where I have this on a PC board, engaging a shaft. My problem is one of tolerancing: I'd like to have a tolerance stack-up that just lets me just assemble the whole unit and have it work, without adjusting and without the shaft binding up on the pot. But the part doesn't come with any mechanical specifications for the radial tolerance of the shaft, nor does it come with any guidelines for using the pot as a bearing (so I assume that's a big no-no).
I got samples and looked at one under a microscope -- it appears that the rotor can move about 0.005" in any direction before it touches the case. Using "don't touch" as a guideline, I end up with tolerances that drive my mechanical assembly costs through the roof. I can't imagine that's the intended way to use this -- it's for consumer products, so there's got to be a way to make it happen.
So, how do people make these things work as rotary position sensors? Is there a mechanical specifications document buried on the MuRata web site that I'm missing? Is there a cost-effective shaft coupler to be had that'll couple the angle without coupling off-axis motion?
Comments, advise, brickbats -- all are appreciated.