I am scanning a cylinder using spiral scanning strategy and also comparing it to a concentric circle scan of the cylinder. Calculating the MAX inscribed circle value. I am measuring ID's from 2.5mm to 4.9mm. I am interrogating the surfaces in similar detail with the same dynamic parameters, and I am getting differences of up to 0.1mm which seems puzzlingly large. The concentric circle strategy is always smaller.
Any thoughts on what might be causing this? Thank you for your time.
