Useless Machine Arm
by godfreja, published
This is a design for an arm for a Useless Machine. I was building one for my Dad for Christmas, and rather then cut out the arm in wood, I designed this to be printed on my new 3D printer.
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Build a useless machine as described at http://makeprojects.com/Project/The+Most+Useless+Machine/91/1#.UNJnFOAZ-lg
Instead of cutting an arm out of wood, print this design. You may have to tweak it based on your other design choices. I have included my OpenSCAD source file if you need to make changes.