Video explanation
Part highlights show the spool, toolhead and axes, including lateral head motion, bed motion and layer-by-layer height changes.
Layer deposition
Heated filament extrudes through a nozzle along sliced paths, with each layer supported by previous material or supports.
Coordinated axes
Head, bed and lift mechanisms share three axes of relative motion, determining where material is deposited.
Support and process limits
Spans, cooling and material affect results. The animation does not prove that the bridge can print successfully without supports.