Re: counting encoder holes ? BEST encoder range ?

A 500 line encoder is the perfect size, especially if you are going
to use steppers. Why, because the unstallable stepper project will
use a 500 line encoder with steppers...From what i have read...


Wally




--- In CAD_CAM_EDM_DRO@yahoogroups.com, "turbulatordude"
<dave_mucha@y...> wrote:

>
> --- In CAD_CAM_EDM_DRO@yahoogroups.com, Jon Elson <elson@p...>

wrote:

> > turbulatordude wrote:
> >
> > >
> > >The main IC is one I cnnot identify. it is a National Semi, 8

pin

> > >DIP with M8528. I can't seem to cross reference that number.
> > >
> > >
> > 8528 sounds like the date code.
> >
> > >My main interest, of course, is to connect 5v and ground

properly.

> > >
> > >Gnd is (I assume on the ground plane) on pin 4 so I assume pwr

is

> on
> > >pin 8.
> > >
> > >
> > You'd be going out on a limb to make such an assumption. I'd try
> to trace
> > wiring back to obvious power supply connections, perhaps

decoupling

> > capacitors.
> >
> > Jon
>
> I have 4 of these and have not put power to any of them as yet. I
> did trace out to the one capacitor on board and it goes to pin 8.
> With ground on pin 4, I assume it is powered on pin 8 like other

IC's.

>
>
> My next question is...
>
> What is the BEST encoder range ?
>
> I read 800 (200 quadrature) often, but am not sure if that is the
> minimum or optimum.
>
> I have a 2,000 (2,000 quadrature-8,000 pulse) that was advised as

too

> sensitive.
>
> The encoders I have are 500 quadrature, 2,000 pulse.
>
>
> Dave