At 15.32 2011.10.17, you wrote:
>slippyr4 wrote:
>> Are you using one of these?
>>  =20
>>> http://www.allegromicro.com/en/Products/Categories/Sensors/ats.asp
>>>
>>>
>>>    =20
>> Yes, ATS642. I made a tiny little potted board with a load resistor and =
a
>> comparator on it.
>>
>> The target is indeed an ABS reluctor ring. The tooth-gap spacing is pret=
ty
>> close to 50:50, as far as I can tell.
>>
>> My single channel solution has been in use for some time now and has pro=
ven
>> to work very well. I just wondered if adding a second one (in the right
>> place, and that might be tough to do) would give me the directionality t=
hat
>> grey code provides.
>>  =20
>Shouldn't be that tough to do.  The second sensor can be anywhere around=20
>the wheel, as long as it is in the middle of a tooth (or gap) when the=20
>first one is right on the edge of a tooth (or gap).  And it doesn't need=20
>to be perfect, although the closer it is, the faster the gear can turn=20
>without losing counts.

Sorry, I missed some posts: is this to know if the wheel is going into a
forward vs backward direction?


>I haven't actually used the sensors in question, but I built the=20
>machines that test them.
>
>Kerry
>
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