Re: Encoder circuits for parallel port hookup?

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "AbbyKatt" <cnc@a...> wrote:

> Hi all,
>
> I know I saw them somewhere before, but I just can't seem to locate

the

> circuit diagrams on either CNCDRO/Mach2 groups anymore.
> What I am looking for is the circuit diagrams that show how to hook

up

> an optical encoder to the parallel port (I assume it needs some
> transistors to drive the input pin... Or at the very least some
> resistors somewhere? Any help would be great!)

Interesting.

I think there is a DRO software for a lathe that used encoders

http://bellsouthpwp.net/A/r/Arts_home_page/DRO1/

Have not checked to see how easy it is to use the software.

>
> The other thing I was looking for was the design that allowed you

to use

> a small stepper as an encoder.. Since I have these in abundance and
> they're a lot cheaper than an encoder. Was it called an MPG? I can

find

> no circuit diagrams for it at all...

I have not heard of a stepper as an encoder.

>
> Thanks,
> ~Abby