Re: [CAD_CAM_EDM_DRO] Renishaw, digitizers

Bill,

More great ideas! Cutting three 'V' groves in the armature (a disk)
should be easy enough to do. I guess the disk could also be a slight
cone? Yeah, I can do that! I think the three holes would still work,
maybe I'll try both!

Now I gotta find some small ball bearings, .1875" dia.

Alan KM6VV


Bill Phillips wrote:

>
> Jon Anderson wrote
>
> >3 conical depressions (like a countersink) would work as well, and might
> >be a lot easier to make and be sure they were on target. In fact, you
> >don't even need cones! 3 holes with well-chosen diameters so that they
> >sat part way down on the balls would work quite well.
> >
> >Jon
>
> If you have 3 holes how do you guarantee that each ball will sit down in
> exactly the same place each time? It will be much better to just mill slots
> rather than a holes. The slot will guarantee two points of contact for each
> ball. The six points of contact wil then fix the dangly bit repeatably in 3
> dimensions.
>
> I hope thats helpful,
> Bill Phillips