Re: [CAD_CAM_EDM_DRO] USB and ncPOD system

On Thu, 24 May 2007 14:55:27 -0400, you wrote:

>>Am I missing something?
>
>Nope, what you need is a rotary encoder with an index
>pulse. Generally something in the 200-254 PPR range is sufficient
>with 254 PPR for a metric thread on an English machine.

? A single pulse is totally adequate if implemented properly, Conect
lathes and BBC B computers running basic were doing it back in the
seventies and Mach still does it now. I must have done thousands of
perfect threads using 1 ppr.

The pod/mach combination simply can't read that pulse quickly enough.

Steve Blackmore
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