I would ask this on the CamBam forum.
In g-code it would be something like this :-
G20 G90
G00 X0 Y0 Z.25 S12000 M3 (MOVE TO START POSITION AND START SPINDLE)
G01 Z0 F10. (FEED TO TOP OF WOOD)
X-3. Z-.5 F6. (FEED 3" AND DOWN .5")
G00 Z.25 (JUMP OUT OF WOOD)
M30 (END)