#1 - You have to set in place a method of setting the tool common every time
ie the tool tip points in a certain direction, and the dial is pointing to the operator when orientated.
#2 - Run code thru the machine, to prove everything is correct
#3 - post out the mastercam canned cycle for "bore with shift", and adjust the post to be the same as #2
The shift amount needed is only small ( say 0.020" ), mastercam will always make it go only 1 way. This is why you do #1. ( or you will damage tools and jobs )
Mastercam uses a drill cycle for boring, (if your posts are stock standard it may be Misc#1 or 2)