On 11 March 2016 at 22:07, Gene Heskett <ghesk...@wdtv.com> wrote:

>> 7M5Q-6B319-BA  (£52)  is a magnetic encoder ring that looks ideal for
>> a lathe spindle. It has a pressed-in bush that is 70mm OD.
>
> How large is the ring itself?

Probably 100mm.

> One wire?  How hard is that to handle in a .hal file?

Very. It would need significant changes to the software encoder
counter, but missing-tooth index isn't a terrible idea for some
applications.
In practice when the idea was first used it wasn't actually a missing
tooth on the starter ring-gear it was a slightly shorter tooth, and
that is something you could probably afford to do to a lathe bull-gear
(maybe not full width)


-- 
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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