Re: Digitizer probe progress

Graham:

Every time I've looked at the digitizer.pdf file, I wind
shaking my head and saying "I don't get it!" I guess some
sort of electrical circuit is supposed to be made or broken,
but I can't figure out how the circuit is supposed to operate.
Could you explain where the wires are supposed to go, and
what causes the circuit to be completed/broken? Am I correct
in assuming that the goal of this digitizer probe is to
detect any deflection in X and Y and deflection in one
direction on Z? Any edification would be greatly appreciated.

Thanks in advance,

-Wayne

--- In CAD_CAM_EDM_DRO@yahoogroups.com, "Graham Stabler" <eexgs@n...>
wrote:

> Just a quick post to say that I have my digitizer probe working. It
> is based on the one in the files section drawn by Carlos Guillermo.
> The file is digitizer.pdf.
>
> Based on this I built the digitizer out of Delrin on my little
> Proxxon mill. I had been looking for 2mm ball bearings for the
> pivots and eventually got these from smallparts.com (shame about the
> $25 postage, grrr). The probe works really well although I am
> disappointed that I did not manage to get the probe part concentric
> with the shaft that is held by the mill collet. This means it is
> only good for digitizing rather than edge finding etc. I may rectify
> this in the future and it was a function of my workmanship rather
> than the design.

[snip]