Re: Digitizers, Renishaw

--- In CAD_CAM_EDM_DRO@egroups.com, Alan Marconett KM6VV <KM6VV@a...>
wrote:

> OK,
>
> I finally see the point Fred was making, use the calipers to "send"

the

> data to a logging computer.
>

Right! but NOT calipers, too clutzy and you must have better accuracy
and repeatability than the Z axis of your machine.

Now Think of Tom Kaluga's DRO as a Data logger. Make a single axis
probe that puts out linear quadrature, and you get down to about $100-
$150 for the probe and $25 for an old XT computer. I like the linear
glass scales for durability, as opposed to the printed plastic ones.
There seems to be a lot of surplus ones around that somebody should
be cutting into 6 inch strips and mounting in cheap probe
assemblies. These would probably be good for .002-.004 inch
accuracy. Actually using a digital test indicator would be better
for a commercial application, as it would be able to also test the
flatness of your machine table(side benefit).

Maybe I will have to get into hardware yet. ;-)

Best Regards,

Fred Smith
IMService