M3- (M)Main spindle (#1) forward (CW) rotation “M3 S1000” 10000 RPM max.
M03- Can only be programmed from Main.
To speed up programming, the FIN signal is sent immediately without
waiting for Spindle to reach Programmed speed. We usually program the
Speed change during a tool change to allow for this time savings.
Use M12 or M53 to confirm Spindle speed as necessary.
Sample code: T101M3S2000