On 28 September 2011 22:55, Bruce Klawiter <bmkl...@yahoo.com> wrote:

> I don't understand the difference between CPR and PPR, I am thinking it has 
> something to do with the A and B channel being 90 degrees out of phase. If 
> that is the case why is the PPR 4 time higher and not only twice as high.

Cycles is the full A+ B+ A- B- cycle. PPR counts both edges of each A
and B slot, so is 4x higher.
>
> The high the line count the better I would assume.

As long as your encoder counting hardware can keep up with PPR x RPS,
yes. But the numbers get big pretty quickly.

-- 
atp
"Torque wrenches are for the obedience of fools and the guidance of wise men"

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