Adding position registers with different configurations or turn counts

What is the result of adding two positions registers that have different turn counts or different configurations? can this even be done?

I have a machine tending program with many pick locations. I am using one position register for the current pick position, and every time a part is picked, I add a x and y offset (via additional PR's) to the "current_pick_position" PR that the program goes to for every pick. (i.e.- I programmed what I believe to be my own palletizing function).

Originally I had a bunch of limit errors that were confusing, and I just ignored them by using L moves instead of J (to avoid dealing with turn counts) to move above the pick point.

Now that I have finally begun to understand how turn counts work, I am going back to the J moves, and seemingly need to create conditional statements which change the turn count of the "current_pick_position" PR based on what pick spot is up next. It would be great if I could accomplish this via addition of PR's.

Any help or other suggestions would be greatly appreciated! Sadly purchasing the palletizing option is not feasible.

Quote from HawkME

You probably should just be using L moves. Joint moves are not usually the right choice for a bunch of calculated offsets. Joint moves are for moving to general start/end positions or different work areas. L moves are best for doing the actual work.

Instead of adding PRs together, just modify the individual elements (x,y,z) as needed.

Ok, I was J moving to above the pick position, L moving down to position, gripping, L move above, And then J again to the machine fixture.

How do you mean modifying individual xyz?

An example of the way I'm doing it now:

PR[12:Pick_Pos]=[0,0,0]

(above would be the position that was just picked, and now the code below indexes the PR to the next position)

PR[13:x_offset]=[25,0,0]

PR[14:y_offset]=[0,50,0]

PR[12:Pick_Pos]=PR[12]+PR[13:x_offset]

PR[12:Pick_Pos]=PR[12]+PR[14:y_offset]

Result is now PR[12]=[25,50,0]