G-code

G-code

1. G-code is sometimes called G programming language

   • The most common situation is that, within a machine tool, a cutting tool is moved according to these instructions through a toolpath and cuts away material to leave only the finished workpiece.

2. G-code is a language in which people tell computerized machine tools how to make something.

3. Generally it is a code telling the machine tool what type of action to perform, such as:

   • Rapid movement
     • Controlled feed in a straight line or arc
       • Series of controlled feed movements that would result in a hole being bored
         • Set tool information such as offset
           • Switch coordinate systems

4. Letter addresses

   • Some letter addresses are used only in milling or only in turning; most are used in both. Bold below are the letters seen most frequently throughout a program.