Re: [CAD_CAM_EDM_DRO] Inductosyn DRO was balls

----- Original Message -----
From: "Jon Elson" <elson@...>
>
> I don't think they are very fine grain. Something like 10 waves / inch.
The rest is done by interpolation. A printed circuit board maker that can
handle a 30" x 1" circuit board could probably make a batch of these for a
couple of hundred bucks. I
> might run a quote to find out what my favorite board house can do.
>

The pdf reference you posted described the scales as 10" sections with .1",
.2" or 2mm pitch. The sections are laid end to end, connected in series and
attached to a metal base. Loss of accuracy at the joints is minimized
because the receiver averages the signal over several periods.

Perhaps the shorter segments would be less expensive to produce and easier
to mount.

This looks like a great solution for long router tables!

Doug