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Generally the first two inputs on the main control can be configured for a quadrature encoder.

But you haven't given us any information on your system - do you have which PLC you'll use specified yet?  What is the make and model of your shaft resolver?

Joe T.

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Hmmm, No expert here, but years ago I had a couple of machines that used resolvers. If I recall they were not like encoders as they did not have a pulse output, but rather they had a two or three phase AC output and the PLC (old Giddings & Lewis) had special resolver modules. My understanding was that the controls compared the phase differences to "resolve" the rotational position of the device. I mainly remember what a pain they were to keep calibrated. I always thought they were pretty "old school" technology.


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