Tweakie,
In this system (Millpwr), the glass encoders are used for the feedback loop. There are no encoders on the motor. But that function is ok. I am able to get pulses for the x and y movement.
What I would like to do is use the reference output of the glass encoder to home the axis. On this encoder, they have a reference track that has reference pulses somehow encoded such that the absolute position of the table can be determined. I thought I just had one pulse in the middle of the table that I could use as a reference for home, but instead, I have many pulses I don't know what to do with. So I need to know how to use the reference track. They call it Position-Trac. I'm guessing that the reference pulses are somehow spaced differently along the scale so that the encoder pulses can be counted between reference pulses to determine where you are; Meaning the distance between reference pulses is different along the scale so that the count would increment by one for each reference pulse. It's just a guess and I haven't the means yet to count pulses to see if that is true.