stepper encoders

I have a small stepper driven desktop mill, that I have made for a
school project. It has been working great using the Mach 1 demo version
and EMC. I noticed that Mach 1 has some dialog for hooking up encoders.

Has anyone any experience doing this? Is it possible with the demo
version?

Is it possible in EMC without using a seperate card of some sort?

I have some renco encoders and I would like to use them, yet I don't
know a whole lot about using encoders. All I realy know is the pin
outputs +vcc, gnd , ch a, ch a not, ch b, ch b not, index, index not.

Could someone explain the basics of hooking up these connections?

Thanks in advance

Troy




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