GitHub - alsliahona/gcode-optimizer: A command-line tool that optimizes CNC Mill and Laser Engraver gcode generated from programs like MakerCAM - also optionally converts mill gcode to laser gcode
How to Work with the G-code - 3D printer \ CNC list g-code commands
How to Gen G-Code and engrave Using Laser GRBL for beginner | Laser, Coding, Cnc router projects