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G-Code
The standardized CNC programming language that controls machine motion, spindle speed, feed rate, coolant, and auxiliary functions. G-code programs are generated by CAM software or written manually, and are read by the CNC controller to direct all machine movements.
G-code is the standardized CNC programming language (also called G&M code or ISO code) that controls all machine motions, rapid movements, linear interpolation, circular arcs, as well as spindle speed, feed rate, coolant activation, and tool changes. Each G-code command specifies a precise instruction such as "G00 X1.0 Y2.0 Z0.5" (move rapidly to these coordinates) or "G01 X5.0 Y6.0 F10" (feed linearly to these coordinates at 10 inches per minute).
Modern CAM software automatically generates G-code from 3D part models, eliminating manual programming for most production work, though programmers must still verify and optimize the code for each specific machine and setup. CNC controllers read and execute G-code line by line, directing servo motors, spindle drives, and hydraulic systems with microsecond precision to move tools and parts through the exact trajectory required to machine the part correctly.
Understanding the fundamentals of G-code helps programmers troubleshoot issues and optimize programs for maximum efficiency and quality.
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