In the following sections we describe which G-codes we are supporting by Grbl and Ultimate CNC.

The Ultimate CNC support the same G-codes that Grbl implement. But we are adding someones directly in Ultimate CNC.


In this section of the documentation the currently supported G-codes are listed, these are the codes which the code interpreter understands. The list of the supported G-codes will change, we planned to add support for more codes in the future.

Most of the G-codes are in modal groups. In one modal group only one code can be and has to be active the same time.

The following table lists show the modal groups implemented by the Grbl firmware and by Ultimate CNC software:


G-code supported by GRBL

G-code supported by Ultimate CNC