March 17, 2014
Your ~4000 counts should be expected. With quadrature encoding, you get 4x as much resolution as pulses per rev (P/R), so this should give you 4096 counts/rev with full quadrature encoding (e.g. using the Arduino’s encoder library)
Without reading the datasheet (I’m bad, I know), Z is usually an absolute position reference. You can set this up on an interrupt (or, if you’re using an Uno, etc. with only 2 interrupts, using PinChangeInt) successfully. Knowing that it is constant high, set up an interrupt to detect a rising edge to set the value of the encoder
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