Concrete 3D Printer

  This is a model of what I hope could be a real concrete 3d printer in the future. The extruder shifts back and forth and lifts up and down. The beam (gantry) can spin in place on top of the machine. The container on the back would supply concrete to the extruder via being pumped through pipes. Uses could be printing supports for structures or buildings, printing buildings themselves, etc. Being mobilized with tracks, it can easily be driven to different areas as needed. The machine would be unmanned.