Word address format

Letters and numbers combine into Words for CNC commands.

The basic format of a G Code statement is called word address format.  This means each command is made up of “words.”

• A word is a letter/number combination such as G90.
  • G is the address of the word.  It says to the controller, “look at your list of ‘G’ commands, pick command number 90 and get ready to do it.”  This particular command (G90) tells the controller to use absolute positioning coordinates for locations on the part.