[Mike Schreiber]

Originally Posted by Carter12s

Wow that is cool. Can I make sure I am getting this right thou? you have a stationary gear mounted at the pivot point of you shoulder, so that as you rotate, the chain linkage from this gear to the wrist would keep the wrist at a constant relative angle, except that by using two different sized gears you get the angle of the wrist to change as a function of the angle of the shoulder! That is really impressive!

I have seen similar techniques used before, It is a cool way to do it, RUSH 2007 pre-ship had the same concept, but using timing belts instead the upper joint was eventually cut for weight. This year 3450 is doing the same thing but with steel cable and our pivot point is at the base, so we have two longer joints. It is basically just a four bar linkage but the chain/belt/cable act as your bars.

I like the design looks cool, looking forward to seeing more.