Rebar tying robot.
https://www.youtube.com/watch?v=vYCDDVARZJU&t=60s
Previously:
https://www.homemadetools.net/forum/...325#post177187
https://www.homemadetools.net/forum/...338#post177255
https://www.homemadetools.net/forum/...506#post139306
https://www.homemadetools.net/forum/...192#post172584
https://www.homemadetools.net/forum/...760#post152183