From Department of Mechanical and Process Engineering at ETH Zurich:
The Aerial Construction project is a collaboration between the Institute for Dynamic Systems and Control and the Chair of Architecture and Digital Fabrication. The objective is to investigate and develop methods and techniques for robotic aerial construction... ( project homepage )
The 6-axis version of the R17HS high speed variant of the R17 robot is now available. As is our policy the 6th axis is an optional bolt-on module. At the same time we have made it even faster and new software eliminates shake and greatly improves repeatability as this video shows. Please see https://www.youtube.com/watch?v=3wG0MeiJ-yE. The video would seem to imply a repeatability of 0.01mm but we are sticking with 0.2mm in the spec. The motor specialist was able to tune the motors from the other side of the pond. My first reaction when we put power on and entered the first commands was to jump back in amazement (and maybe an expletive). Tip speed is now 3m/s; that's 3 times as fast as its nearest competitor yet costs half the price. I love it when a plan comes together.