Quote Originally Posted by champion View Post
Um, what are you talking about? How should I measure angular position with the very high accuracy I need without an encoder? How am I gonna have the PIC do the work of the encoder? Youre lost.
Yep, you're right, I am completely lost...After reading through the datasheet linked above and for teh 2122-5 itself, I found that what you're trying to do is physically impossible without a decoder/counter chip in between the PIC and the encoder. After all, who would've ever thought of using a couple of the interrupts and registers on a PIC to detect level changes on the outputs of an optical encoder. 'cause that would just be silly.

NOT! There are loads of 'google-able' references out there for directly connecting a quad-encoder to a PIC, with very high resolution/accuracy (which is obviously dependant upon the encoder itself), AND easily complete other tasks at the same time, all without missing pulses from multiple encoders...but I give up. Sometimes ya just can't tell a person anything.