On dual-column machines, you must calibrate each column separately to ensure that measurements from both probes are accurate. In addition, you must calibrate the columns using a common set of spheres to ensure that the measurements are reported in the same coordinate system. In PowerInspect, you can choose to calibrate the columns manually or with CNC-assistance.
When using dual-devices, you must calibrate each device separately using a common set of spheres. This ensures the measurements of both devices are reported in the same coordinate system.