G codes & m-codes g-code

G-code which has many variants, is the common name for the most widely used numerical control (NC) programming language.

It is used mainly in computer-aided manufacturing for controlling automated machine tools. G-code is sometimes called G programming language.

In fundamental terms, G-code is a language in which people tell computerized machine tools how to make something. The how is defined by instructions on where to move, how fast to move, and through what path to move. The most common situation is that, within a machine tool, a cutting tool is moved according to these instructions through a toolpath, cutting away excess material to leave only the finished workpiece. The same concept also extends to noncutting tools such as forming or burnishing tools, photoplotting.

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  Rapid move (transport the tool through space to the place where it is needed for cutting; do this as quickly as possible)
  
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  Controlled feed move in a straight line or arc
  
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  Series of controlled feed moves that would result in a hole being bored, a workpiece cut (routed) to a specific dimension, or a profile (contour) shape added to the edge of a workpiece
  
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  Set tool information such as offset
  
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  Switch coordinate systems
  

M-Codes: