cnc 3040 and mach3 problems

[JAZZCNC]

It just shows how naff g-code files are when the units are not specified in a file header,

They are if you know how to read g-code the G20 says it all. It's always at the top of G-code or in the intial string and Mach displays this on the top bar so there's no excuse really.! . . . . Every one should try and learn a little G-code and Units to be cut in is one of the must's along with offsets and mode codes.

[hoggy]

going to try greasing it and see what happens

[EddyCurrent]

They are if you know how to read g-code the G20 says it all. It's always at the top of G-code or in the intial string and Mach displays this on the top bar so there's no excuse really.! . . . . Every one should try and learn a little G-code and Units to be cut in is one of the must's along with offsets and mode codes.

Yes but I meant in a proper file header, not the code itself, so that Mach3 for example could scale it automatically.

[JAZZCNC]

Yes but I meant in a proper file header, not the code itself, so that Mach3 for example would scale it automatically.

Ok last word from me on this as it's not the OP's problem.!!

Mach won't scale it automaticly because it's native units are set to metric so 1 in G-code equals 1 unit and if thats metric it's 1mm or 1" if imperial.
The G20/21 doesn't change any of mach's settings so the native units are the same. It's mostly to identify the units not set or change them.

[EddyCurrent]

Ok last word from me on this as it's not the OP's problem.!!

Mach won't scale it automaticly because it's native units are set to metric so 1 in G-code equals 1 unit and if thats metric it's 1mm or 1" if imperial.
The G20/21 doesn't change any of mach's settings so the native units are the same. It's mostly to identify the units not set or change them.

You are correct but what I'm saying is, this leads to issues where the machine cuts to the wrong size.