Calibration bar

Details Calibration bar Calibration bar

1989-12-01

1991-09-03

Lall, Parshotham S.

Boots, shoes, and leggings

364559, 33288, G01B 7315

Patent

active

050460323

ABSTRACT:
A cross toe zero calibration system for use in an automotive vehicle wheel alignment system uses a calibration bar for receiving cross toe measuring head units. A first set of cross toe measurements are taken with the bar in a first position and a second set of cross toe measurements are taken with the bar in a second position. In the second position, the bar is rotated 180.degree. from the first position. The two sets of measurements are averaged to yield zone cross toe angle calibration factors. The combination of rotating the bar and averaging the two sets of measurements nulls out errors introduced into the calibration measurements due to deformities in the bar. The calibration bar is mounted on the main console of an automotive vehicle wheel alignment system. Switches are included which indicate the position of the bar. A computer in the automotive vehicle wheel alignment system prompts an operator through the steps of calibration, accepts the calibration measurements and calculates the calibration factors.

REFERENCES:
patent: 3953134 (1976-04-01), Appel et al.
patent: 4095902 (1978-06-01), Florer et al.
patent: 4204333 (1980-05-01), van Blerk
patent: 4336658 (1982-06-01), January et al.
patent: 4381548 (1983-04-01), Grossman et al.
patent: 4594789 (1986-06-01), Marino et al.
patent: 4761749 (1988-08-01), Titsworth et al.
patent: 4931964 (1990-06-01), Titsworth et al.

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