I found that
N4 G282 X-120.0 Y0.0 Z-10.0 R2.0 Q2.0 F800.0 M54
is doing pecking and it seems to reverse the spindle on going up, however I couldnt see
if it was real ridgid tapping or not due i did it in air, so not sure if its going to
break in metal or not...