Abstract: A method for analyzing the vibration of a tire uniformity machine having a number of rotating components uses the signals from load cells when the machine idle to output voltage signals that are then amplified and input into a computer as unfiltered, amplified voltage signals. The signals are converted into a power spectrum and selected groups of frequencies and their amplitude are compared with acceptable amplitudes for the frequencies generated by various rotating parts of the machine. When at least one of the amplitudes for different frequencies is greater than at least one of the acceptable amplitudes for the frequencies generating different rotating parts of the machine, the computer outputs an alarm signal.

Abstract: An apparatus which uses a sensing device for measuring gauges of elastomeric or rigid articles, or runout of elastomeric articles, has a pivoting arm which holds a means for creating a signal, and is movable relative to the object being measured. The means for creating a signal provides a signal to the sensing device, and the magnitude of the signal depends on the position of the pivoting arm relative to the object being measured. Movement of the pivoting arm, caused by changes in the dimensions of the object, can be recorded and analyzed.

Abstract: System for testing pneumatic tires. A tire that revolves under a load is deformed at the area in which it meets the roadway. Such a deformation results in the tire having an effective rolling radius that is shorter than the radius it has while static and/or unloaded. According to the invention, tires are tested by determining their effective rolling radii. When tires having similar effective rolling radii are used on an automotive vehicle, the undesirable torque steer effect is thereby reduced.