G-code and M-code are the foundational languages that drive CNC (Computer Numerical Control) machinery and 3D printers.

Example Script: Filament Counter The above script doesn’t yet modify the G-code, so let’s write one that actually does something.

And if you want to see another example a DIY G-Code generator, check out this free 3D-modelling software Blender add-on called Blender CAM. Thanks [Martin] for the tip!