Pithed circle diameter

I am investigating the best method of positioning lets say a screwwdriver around a series of bolts positioned around a flange has anyone any exerience of this?

Can you be a little more descriptive on what you’re looking for? Are the bolts already positioned, or are you planning to position them as a result of some calculation?

Without any other details, the best way to position a screwdriver over the bolts is just to teach the waypoints like anything else. Since that seems way too easy, my guess is you have a more complex task in mind.