On 9 March 2016 at 16:54,  <[email protected]> wrote:
> The issue is that we drilled about a .130 hole for the index but it acts odd. 
>  If you rotate the spindle one direction it will pass the index and stay high 
> until it passes the hole then you get a little index pulse low.  If you run 
> it the other direction it goes low after passing the index - and you get a 
> positive index pulse at every passing of the hole.

This may be the internal logic at work. The sensors are rated to zero
speed, and I think have an internal offsetting circuit. However I
can't see how it can tell which way the gear is turning unless it has
two sensors.
Some automotive sensors do actively sense direction, and send a
different pulse length in one direction compared to the other to
encode the direction on a single wire.

-- 
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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