On Thu, 29 Nov 2018 at 17:16, David Berndt <[email protected]> wrote:

Ok, thanks guys. I'll go with a seperate encoder to pickup a once per
> rotation count. Are there any requirements about on/off span in relation
> to A/B.
>

No, any once-per-rev pulse will do.
As  has been mentioned, unless you want to do peck-tapping you can probably
get away without an index.
I think that even gear-hobbing would work fine.
You would need a proper index for spindle orient if there is a tool
changer.

-- 
atp
"A motorcycle is a bicycle with a pandemonium attachment and is designed
for the especial use of mechanical geniuses, daredevils and lunatics."
— George Fitch, Atlanta Constitution Newspaper, 1916

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