2007-Dec-2 - GCode and Changes

Why does G-Code Change?
We humans like flexibility.  We also like standards.  G-Codes are standardized in a certain sense.  Once you start to be able to read it, you can read just about any flavor of it.  That is the standardized part.
All CNC Milling machines are not created alike.  Even identical machines are different to a certain degree.  They may not have the same tools loaded or they have been slightly modified to produce a certain type of part.  Interesting how people like to customize thier machine controllers.

That is why GCodes are not the same.  You need some flexibility in the CNC programming to accommodate all situations.  Couple that with the fact that every manufacturer thinks their version is the best and you get a myriad of G-Codes out there.

Many manufacturers also try to force you to only use their code.  For example, they give you a design interface to make parts and a CAM interface to produce code.  They lock you into their “Black Box” so you can’t go elsewhere for service and support.  They lock you in their “Family.”  Sometimes they make up a completely different kind of G Code language that no one can understand but them.  They do that to keep your hands tied up.