The first block does two things and is kind of a very simple setup block. ExampleĪ trivial example of a couple of blocks: G90 G21 A list of the different G and M-codes can be found here and here. A complete list of all of the letters with explanations can be found here. The most important ones are arguably G (used in most movement commands), M (miscellaneous commands), X, Y and Z (the last three are used to define positions in the X,Y,Z space, absolute or incremental). These letters corresponds to different types of commands. Everywhere you look in the code you will mostly see letters with numbers behind them. ![]() ![]() A CNC mill interpreting G-code in real-time Structure and CommandsĮach new line (called block) in the G-code can be roughly regarded as a new command.
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