Try this a sample process.
1) Set the air pressure to achieve specified intensity.
2)Establish saturation by keeping the nozzle positioned perpendicular to the surface to be peened while using an approximate eight inch (8”) brush or stroke of the gun at ½” to 1 ½” per second. Use two (2) passes to peen the first strip, four (4) to peen a second, and continue as needed. Saturation is reached when doubling the number of passes results in no more than a 10% increase in arc height. A minimum of four (4) readings is required.
A couple of questions
1)Are you 100% sure the air pressure is constant?
2) Is the variation between operators or the same person?
3) How are you controlling media flow now?
