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ISO G-Codes for CNC Milling & Canned cycles

 


CNC (Computer Numerical Control) milling machines are controlled by a specialized programming language commonly known as G-code, which adheres to the ISO 6983 standard. This language comprises G-codes (Geometric codes) that dictate tool motion and M-codes (Miscellaneous codes) that manage machine functions. Additionally, "canned cycles" provide simplified commands for common, repetitive machining operations.

ISO G-Codes for CNC Milling

G-codes are preparatory functions that instruct the CNC machine on how to move the tool. They define the geometry of the toolpath.

Common G-Codes for Milling:

  • G00 (Rapid Traverse): Moves the tool at the maximum possible speed to a specified position. Used for non-cutting movements to quickly reposition the tool.
    • G00 X100 Y50 Z10 - Rapidly moves the tool to X100, Y50, and Z10.
  • G01 (Linear Interpolation): Moves the tool in a straight line at a programmed feed rate. Used for cutting operations.
    • G01 X20 Y30 F100 - Moves the tool linearly to X20, Y30 at a feed rate of 100 units/minute.
  • G02 (Circular Interpolation, Clockwise - CW): Moves the tool along a circular arc in a clockwise direction at a programmed feed rate. Requires specifying the end point (X, Y, Z) and either the center of the arc (I, J, K) or the radius (R).
    • G02 X50 Y50 I20 J0 F50 - Moves clockwise to X50, Y50 with the arc center at I20 (relative to current X) and J0 (relative to current Y).

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