> Dear All,
> I am using AC-Servo Motor(SANYO DENKI) which have a encoder. The encoder
> provide A and /A phase, B and /B phase, Z and /Z phase. The Pin assembly
> of HAL, there are not any pins about /A, /B and /Z phases, but there are
> provided in the 7I33T. If I would like only using 5I20 to do the control
> unit. Are there any solution to solve the problem.
> Thank you very much!!
The A and /A (not-A) are differential signals, and the m5i20 only has
inputs for single-ended signals.
If you want a quick-and-dirty solution use only the A signal and leave
the /A not connected. Make sure the encoder ground and the m5i20 ground
are the same. (same thing of course for B and Z)
If you want to do it the proper way you need a chip that converts from
differential signals to single ended ones. I used a DS3486 but there are
many others. Info on the board I made is here:
http://www.anderswallin.net/2007/04/differential-encoder-interface/
Anders
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