Gkode

Gkode is a term that appears in some discussions as an alternate spelling for G-code, the programming language used to control CNC machines, 3D printers, laser cutters, and other automated tools. The standard term recognized by manufacturers and the CNC community is G-code; Gkode may result from typographical variation or regional spellings, and it is not an official specification in itself.

G-code programs consist of simple text lines that specify movements, speeds, and tool actions. Each line typically begins with a letter code (G, M, X, Y, Z, F, etc.) and a numeric value. G commands control geometry and motion (G0 rapid move, G1 linear move, G2/G3 arcs), while M commands control machine state (M3 spindle on, M5 spindle off, etc.). Units are commonly millimeters (G21) or inches (G20), and positioning can be absolute (G90) or incremental (G91).

Controllers and dialects vary by manufacturer and firmware, leading to small differences in syntax and supported features. Typical ecosystems include CAM software that generates G-code, post-processors tailored to machine brands, and firmware that interprets the code (e.g., Grbl, LinuxCNC, Mach3/4, or proprietary controllers).

Because Gkode is not a formal designation, many references will simply discuss G-code, including examples and tutorials. A minimal sample might look like: G21 G90 G1 X50 Y25 F1500. Safety and verification are important, and operators often use simulations or dry runs to verify tool paths before real cutting or printing.