YARRM 7 DoF arm from the Hackaday prize

Screen Shot 2016-05-10 at 9.22.12 PM

In the Hackaday Prize competition on hackaday.io, there has been a lot of robotics activity.  This is a pretty clever arm designed to be a 7 DoF (degrees of freedom) arm.  What I appreciate about this arm is that the designer, Jonathan Lussier, used steppers and belts at the shoulder and upper arm and used servos at the extremities.  Assuming he is using cheaper servos, this would provide low cost, high strength to weight fine motion while the coarse motion could be done accurately with the heavy steppers embedded in the base.  The goal of the arm is to be less than $500.  Link here

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