Re: [CAD_CAM_EDM_DRO] Need Encoder Hookup Help

Bill Vance wrote:

> >>
> >> You could try this:
> >>
> >> O +12V
> >> |
> >> /
> >> \ 20K ohms
> >> /
> >> \ CMOS inverters run at 12 Volts.
> >> .01 | |\ |\
> >> 5V---||------+----------| >O---| >O-----to counter
> >> sig in | |/ |/
> >> /
> >> \
> >> / 20K ohms
> >> \
> >> /
> >> \
> >> |
> >> _____
> >> ___
> >> o
> >>
> >> Use open collector TTL inverters if you need speed. They need a pull up
> >> resistor on the output, too, but will probably work without the input side
> >> components shown above
> >
> >Oh, no! This definitely will not work! You can't put a capacitor in
> >series with the encoder signal, as it needs to pass signals totally
> >down to DC. This would cause massive problems when the encoder
> >was not moving.
> >
> >Jon
>
> Silly me, here I was thinking _digital_.

Well, it IS digital. But, you must have been thinking of a steady-state
system, where pulses were coming in at a steady rate. then, such a
design would work fine.

Jon