Write gcode compatible with Carbide Nomad CNC

[Jørn Sandvik Nilsson]

The Carbide Nomad runs gcode generated by flatcam, but there are a few things not working properly:

• Without a spindle speed parameter to the M03 codes, the speed is very very slow. There are already an issue and a pull request awaiting approval for this feature: https://bitbucket.org/jpcgt/flatcam/pull-request/13/added-parameter-spindle-speed-to-cnc-jobs

• Feed rate needs to be set as a parameter to the move commands. The feed rate set explicitly as a separate command in the head of the file seems to be ignored. Example of a working command (generated by MeshCAM): G1A0.000Z-0.423F3.7

I don't know whether adding feed rates to the commands directly will break other mills. Maybe the feature can be switched on/off by a set_sys command? I can write the code and verify it if the repo owner is ok with the approach.

[Juan Pablo Caram]

Was this solved in the merge?

[Juan Pablo Caram]

Pulled in from reporter.