Help needed to get my 7i76E + 7i85S + 7i73 on my mill going.

tecno wrote:

Hal show
Turning spindle by hand very very slowly where I can clearly see A/B transitions but nothing on Index.

The definitive way would be to "sets xxx-index-enable true" then rotate the spindle and see if it ever goes false.

The software needs to see index-enable go false to start the tapping cycle, but I don't know if it technically requires that it be in the right place unless you are doing rigid tapping.

You could try an experiment where you start a rigid tapping move (MDI) then manually "sets xxx-index-enable false" when you see it get set to true. It will either work or give a following error, I don't know which. If it gives a following-error then it means that it also requires the counts to be zeroed (another effect of index-enable)

I can imagine generating an index pulse in HAL and sending that to the encoder counter working (just as long as you don't peck-tap)

If you use NPN proximity switches you can connect them directly to 7i73 inputs as they act as a switch-to-ground.
I have 24V NPN proxes connected to the 7i73 in my Lathe apron.
(Don't try this with PNP though)