(10) US 2019/0105834 Al
(57) A three-dimensional printing system that includes a nozzle and means for positioning the nozzle. The nozzle is configured to dispense a concrete mix. The means for positioning the nozzle may include cable and control systems. The cable system includes positioning cables that are connected to the nozzle. The control system includes control modules each connected to a different corresponding one of the positioning cables. Each of the control modules controls a distance that the corresponding positioning cable positions the nozzle from...