Well, I can say something about ArtCAM JewelSmith and Rihnoceros.
I’ve tried to work with them some time ago. ArtCAM is not bad, quite
big amount of tools and patterns for ring making, but unfortunatelly
very poor tutorials, so if You want to learn it by Yoyrself it would
take some time. after makeing a design, there is a chance to chose
toolpaths, shrinkages and a machine You’re working with, it is (as I
understood) compatible with engraving machines too. I wasn’t
impressed with rendering results comparing with “3Design jewelry”,
but it is not the main thing.
Rhino is much more complicated, because it is not only for
jewellers, mainly for everything. It has bunch of tools, that to
learn completely would take couple of years I guess. If You want to
design jewelry, You have to buy ADDITIONAL softwaRe: Flamingo,
Techgems and maybe other, it is like Rhino parts. Rhino has a good
complete tutorial and company ROLAND3D oranise training courses.
I haven’t tried 3Design jewelry, but I guess it is not so good like
ArtCAM, because price is much lower than ArtCAM’s. In my country
ArtCAM costs about 10000 Euros.
I suggest to evaluate the programs Yourself, read descriptions,
download trials and try, after couple of days, You can already see
some advantages and disadvantages. Good luck!
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