The ultimate vision of personal fabbers is for people to download
designs from the Web and print the objects in the comfort of their own
homes. While ubiquitous fabbers are still off in the future, it is
possible today to download designs for physical objects from the Web.
Visitors to Cornell University's online museum of kinematic mechanisms
are beginning to discover its exhibits of more than 300 historical
models of 19th-century machines. Equipped with a rapid-prototyping
machine (many universities have at least one), cybermuseum patrons can
download designs from
http://kmoddl.library.cornell.edu/ and print their
own preassembled, detailed, functional replicas of machines that are
object lessons in the geometry of pure motion.