operation cnc

[GTJim]

That's sounding good. But let us in on your breakout board issues.

[Jonathan]

Now draw it without overlapping any lines or retracting the pencil ;)

It sounds like the acceleration on your machine is set quite low, what value is it currently? You should be able to get at least 1m/s^2 comfortably.

In mach3 there is a list linked to from the main screen which explains what each G-code does, so it shouldn't be difficult to work out what the initial commands do and how the arc command has been used to construct a circle.

[JAZZCNC]

Little tip with G-code. G0 and G1, G2,G3 are whats called modal commands so you don't need to repeat the G0 or G1 after the first instance IE:
G1 x10 y10 f200
G1 y30 z-12
G1 x50 y20

could be written.

G1 x10 y10 F200
y30 z-12
x50 y20
The G1 linear command will stay in affect untill it's cancelled by either another Modal command Like G0, G2,G3 or a cycle command like G83 drill cycle.
Same goes for the F# this feed rate will stay in affect until changed by another F#