Editing Computer numerical control (section)

===G-codes===
[[G-code]]s are used to command specific movements of the machine, such as machine moves or drilling functions. The majority of G-code programs start with a percent (%) symbol on the first line, then followed by an "O" with a numerical name for the program (i.e. "O0001") on the second line, then another percent (%) symbol on the last line of the program. The format for a G-code is the letter G followed by two to three digits; for example G01. G-codes differ slightly between a mill and lathe application, for example:
:[G00 Rapid Motion Positioning]
:[G01 Linear Interpolation Motion]
:[G02 Circular Interpolation Motion-Clockwise]
:[G03 Circular Interpolation Motion-Counter Clockwise]
:[G04 Dwell (Group 00) Mill]
:[G10 Set offsets (Group 00) Mill]
:[G12 Circular Pocketing-Clockwise]
:[G13 Circular Pocketing-Counter Clockwise]