I am looking for some type of differential encoder interface to run the DRO in mach 3 from the differential rotary encoders on my servo motors.

I have seen the rogers machine's interface, but it is for single ended encoders.

Any suggestions?

I am looking for some type of differential encoder interface to run the DRO in mach 3 from the differential rotary encoders on my servo motors.

I have seen the rogers machine's interface, but it is for single ended encoders.

Any suggestions?
You can buy a chip to convert from differential to single ended encoder or just use the A and B and ignore the a and b. The benefit of the chip is that you get the noise rejection benefits if you put the chip near the computer.
I got mine from newark in one but I don't remember the part number right now.

If you are using the encoders to also feedback to a motor drive, then I would suggest caution in how you do it.

Mike