Re: [CAD_CAM_EDM_DRO] Re: Ecoder resolution terms

ballendo wrote:

>Jon,
>
>I thought pulses meant the "whole" square wave. Which means either 200
>(one channel) or 400(both channels)PPR for a 200 line encoder?
>
>

A CYCLE is a definitive term, and when you look at it in quadrature,
it would be from the rising edge on the A channel to the next rising edge
on the same channel. That would give 4 COUNTS.

Most makers who use the horrible "Pulses/Rev" form mean the same as
CYCLES/Rev. So, a 200 line encoder would also mean 200 CYCLES/Rev
or 200 pulses/rev, as it will give 200 pulses on the A channel for a
complete
turn. (It also gives 200 pulses on B per turn.)

That is the standard way these terms are used, but some makers have used
these terms different ways. Many encoder manufacturers have slowly
moved to Cycles/rev as the definitive term, as it is pretty hard to
misunderstand this one. (Except when it is abbreviated to CPR, whoer
it could mean cycles or counts! UGHHHH!)

Jon