How do Filament 3D printers build a model?

A 3D object is created by wastefully removing bits of material from a larger block, 3D printing works by building an object layer-by-layer and only adding the necessary material to create the object. The process of additive manufacturing is to first develop a model, which is then digitally produced and sliced into thin layers. The printer adds plastic layers on top of each other through precise motions until the print is complete.