Is it possible to program this machine using conventional G & M codes?
Yes! But when loading, it is considered "other" files and must have a TXT extension. But unless you have a full size keyboard on the machine and know how to use a DOS editor, you cannot edit the program on the machine.
Here is something to try. Load a conversational program and while in the RUN mode, press the minus key. It will pull up the G and M codes the BMDC has converted it to.
George
(Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)