Think of things that affect intensity and determine if any of those factors in your process are changing while the machine is rotating. These include: stand off distance, air pressure, media flow.
If you are using an intensity verification fixture, you may decide to place an almen strip at a location that is peened during machine rotation.
What may be affected by changing rotation and/or rotation speed is exposure time and therefore time to required coverage. You should take this under consideration when developing your process.
