Concrete Printer (Need Help)

[neuo]

Assuming that there's a concrete pump somewhere in your system, the "extruder" just has to be a piece of pipe sized for the amount of material you want to dispense at a time.

thanks awerby for the reply

thats correct its a pipe thats connected to the pump the question is how to control the pump to dispense (X) amount of concrete on (XY) location and to stop in another location is it done by the controller that is connected to the pump or it should be controlled by the extruder that is connected to the controller ?