FILE ==> tangle5.stl.gz
A "Borromean configuration of 5 loops in which no two loops interlock, but the overall configuration cannot be taken apart. The two objets will serve as a mathematical demonstration objects and will be the focus of a talk at the BRIDGES'99 Conference.
This design and fabrication effort is part of a research program sponsored by NSF to streamline the process of rapid prototyping of free form parts, by defining a clean separation and interface between designers and fabricators.
Orientation of layered fabrication is uncritical.
In the .STL file describing this part, the vertices from different segments (tori, cylinder) have not been merged. Thus this requires software that does not get upset when when shared vertices appear separated by one unit in the last digit due to rounding errors.
The compressed file can be downloaded from our anonymous FTP
site with:
ftp ftp.cs.berkeley.edu {login as "anonymous"; use your full
e-mail address as password.}
Then change directory: cd ucb/projects/unigrafix/STL99
Fetch desired files: get FILE.stl.gz
The FILE.stl.gz file can be uncompressed with gunzip.
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