[Jewelry making - Article 00413] - [Orchid] CAD design uneven shrinkage

[Renaissancewiz]

========[ Invite a Friend - http://www.ganoksin.com/invite.htm  ]========

    This one puzzles me. Hopefully someone here can shed light on the
    situation. 

    I'm designing two interlocking parts with very close tolerance on
    Rhino. One piece is a little bit thicker than the other. 

    On my computer they fit together perfectly with a little (although
    very little) wiggle room. After I have them grown in extreme
    resolution perfactory and cast, I get them back in both resin and
    tumbled silver. 

    Here's the question: They don't fit together like they do on my
    computer screen. I would expect that if there is any shrinkage it
    would be during casting, but that's not the case. Both resin and
    silver fit the same. 

    Now in my years of casting experience I've found that the heavier
    the piece, or section, the greater the shrinkage. Just the opposite
    is true in this case. The heavier piece is larger, and will not
    interlock with the other. It's not hard to file it down a bit and get
    it to work, and it's easy to tweak my Rhino file, which I'm doing. 

    It just baffles me, and I wonder if some of the Orchid brains can
    explain this one. 

Orchid rocks!
TH
____________________________________________________________________
T h e   O r c h i d   L i s t
Open Electronic Forum for Jewelry Manufacturing Methods and Procedures
____________________________________________________________________
Orchid FAQ:
~ http://www.ganoksin.com/orchid/faq.htm
Orchid Archives:
~ http://www.ganoksin.com/orchid/archive
Orchid Galleries:
~ http://www.ganoksin.com/orchid/gallery.htm
Invite a Friend:
~ http://www.ganoksin.com/invite.htm
____________________________________________________________________
Tips From The Jeweler's Bench - Article Archive
~ http://www.ganoksin.com/borisat/tip_sear.htm
The Jeweler's Selected Bibliography List
~ http://www.ganoksin.com/jewelry-books
Buy Orchid Jewelry:
~ http://www.ganoksin.com/shop
____________________________________________________________________
-Unsubscribe:
-Email: orchid-request AT ganoksin.com Body=unsubscribe subject=blank
____________________________________________________________________