METHOD FOR CALIBRATING A WALL THICKNESS INSPECTION MACHINE

摘要

METHOD FOR CALIBRATING A WALL THICKNESS INSPECTION MACHINE A computer senses a voltage which is representative of wall thickness and defines with the use of a voltage/thickness curve the thickness of that wall portion. To define this curve, a plurality of voltage/thickness points are inputted into the computer. Each point is defined by sensing and defining the voltage of a wall portion on a calibration standard having a known thickness and defining a calibration thickness corresponding to that voltage using the following equation: {((Calibration Standard Diameter in inches - Container Diameter in inches) X 0.2) + 1} X Calibration Standard Thickness in mils, and equating these calibration thicknesses to the corresponding voltages produced by the sensing means when sensing said at least two thicknesses of the standard.