I remember watching my grandmother struggling when moving heavy things around when I was younger. So when I was 15, I had big plans on making an exoskeleton arm that would help her. I had a notebook filled with sketches and designs (I turned whole house upside down to find it but I think it's lost) of the ExoArm using buttons and no microcontroller. Good times.

Now that I'm older, I have a new goal. The goal is that people who can't afford to buy those expensive exo-arms, have a chance of making one by themselves. From scratch, with little to no money. I've received many mails from people from third world countries that will try and make one by themselves! And this is so awesome!
So until the end of this competition, I will focus all my work into making this arm little more user-friendly and practical to use.  

All the best!

Kristjan B.

An experiment intended to reduce Z wobble in prusa i2 printers.
The holes are deliberately sized to fit perfectly straight off the bed. The holes in the wings should allow an M3 screw to slide through without much resistance but also without much play, the holes in the centerpiece should be super tight so you can actually cut a thread by driving the M3 screw in.
The motor shaft has a single nut trap for the flat, the threaded rod has 3 nut traps in case some alignment is needed.
8x M3x10 or M3x15 screws and 4x M3 nuts are required for each Universal Joint.