Re: digitizer arm, w/ encoder?

Jon,

How small? Which encoders/parts? the HP's I have are BIG. I was
thinking "Last Word" dial indicator, size wise, for Sherline-sized
hardware.

I wonder if a "photo-interrupter" could be used? A little deflection
would move the vain/tip out of the light path. Wouldn't give mills of
deflection, but could still be useful.

Alan


Jon Elson wrote:

>
> Alan Marconett KM6VV wrote:
>
> > Dave, Ballendo,
> >
> > You mentioned a dial indicator. If one could connect a dial indicator
> > hand to a shaft encoder... or how about the little glass opto-sensors
> > used to sense head position in some (old?) hard disks I've seen?
>
> Yes, I also was thinking that this could be done. I have a couple of
> HP codewheels and the optical reading head. They are quite small.
> I could easily imagine building one of these onto a dial indicator.
>
> Jon