Fanuc G52 local datum

[hugh jars]

I have a Kryle VMC535 miller, Fanuc OM, Mcam V9.1 level 3. The Kryle is equipped with a 3R reference plate and the machine XYZ = 0 point is set to a particular hole on the plate and not changed. Numerous different jobs go on this machine - some are repeat jobs held in a fixture and others arrive in a hurry, are machined in vices or chuck, and are never seen again.

 

I am fairly new to Fanuc (getting excuses in early!) and here's how it works for now -

I construct geometry around an obvious part datum and then put a datum shift into the program by typing the shift into 3 of the miscellaneous reals and sending these out with G52.

 

Are there any pitfalls in what I am doing ?

What method would you recommend for moving my datum about ?

Thanks