> When it comes to electronics I need all the help I can get. So the MPG puts
> out 4
> pairs of signals and the LM399 converts that to 4 outputs? Lots of googling
> going
> on... and EMC needs? I'm just looking at a MPG spec sheet and they only have
> 6
> connections so I assume one is ground, one is power in and the other 4 are
> the
> signal coming out. Now I'm really confused. The LM399 has 8 inputs and 4
> outputs.
> Can you explain just a bit more for me please.
The cnc4pc jogwheel has A and B outputs ('single-ended' if you like).
These plug directly into the A and B channels of a hardware encoder
counter (m5i20, pico-systems, vital, etc.).
If you don't have a spare encoder input the jog-wheel could be read by
two general purpose I/O pins (e.g. parallel port) since you are not
likely to spin the jogwheel very fast.
Some jogwheels use differential signals, which means instead of just the
A and B signals you get A+, A-, B+, and B-. If you have I/O to spare you
could wire all four of these to EMC. If you want to condense these four
into just two A and B signals you can do that with an IC. I did that
with a DS3486.
AW
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