[Jewelry making - Article 00014] - Re: [Orchid] CAD/CAM stuff

[Bruce Holmgrain]

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>         HI Bruce Sander's waxes, unless sealed, allow investment to
>     penetrate slightly into the surface, not very much, but enough to
>     highlight the stair stepping effect of the Z (vertical build)
>     layers. 

    I visited M2 Systems in Conneticut a few months ago and did not see
    any stepping in the Z direction. I wonder if these were newer
    machines. They were trying to dispose of a couple of older
    machines(they were trying to dispose of a Sanders or two  AT  $25,000).
    In addition, they were looking at buying a German made machine that
    seemed to be 3-4 times as precise as the newer ones with no signs of
    growth. 

>         Doc Robinson's investment (I use it too, and have used ringless
>     casting systems since the 80's) is excellent because of the fast
>     setup time, but it is a weak investment where tiny details are
>     concerned, and we'll use the hard Japanese investment for those
>     castings. 

    The Doc's investment allows no gases to escape. I have run venting
    sprues away from the resevoir to avoid trapped gases on a couple of
    ocaisions. Seems to have worked well for me. 

Bruce D. Holmgrain
JA Certified Master Bench Jeweler
http://www.goldwerx.com


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