What does G-code represent in the 3D printing process?

G-code is a numerical control (NC) programming language that is essential in the 3D printing process, serving as a set of detailed instructions that guide the 3D printer on how to execute each layer of a print. This code consists of commands that instruct the printer on various aspects, such as where to move the print head, when to extrude or retract filament, and the temperature settings for the nozzle and bed.

Each G-code command conveys specific movements and actions using coordinates and other parameters, enabling precise control over the printing process. By interpreting these commands, the 3D printer can accurately replicate the desired object layer by layer, which is crucial for achieving the expected dimensions and details in the final print.