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