Boots – shoes – and leggings
Patent
1991-01-16
1992-08-11
Shaw, Dale M.
Boots, shoes, and leggings
36457104, G01B 300
Patent
active
051385635
ABSTRACT:
The invention contemplates a technique to correct for measurement error which is attributable to gravitational sag of a probe head (6) mounted to a multiple-axis articulating head (2). To this end, a variable (b) is determined which describes the stiffness of the articulating head (2) and/or of a probe extension (5) mounted thereto, said variable being characteristic for the probe configuration in question and being entered into the memory of the computer of the coordinate-measuring machine. The sag B (.alpha., .beta.) which has differing values that depend on actual angular positions (.alpha., .beta.) is then calculated from these angular positions for each of the angular positions, and the calculated sag value is appropriately taken into account in computer-reporting of coordinate-measurement values made by the machine.
Calibration of the articulating head in each of the various different angular positions is therefore unnecessary.
REFERENCES:
patent: 4333238 (1982-06-01), McMurtry
patent: 4530062 (1985-07-01), Inaba et al.
patent: 4663852 (1987-05-01), Guarini
patent: 4710884 (1987-12-01), Tokairin et al.
patent: 4888877 (1989-12-01), Enderle et al.
patent: 5005297 (1991-04-01), Aehnelt
patent: 5018278 (1991-05-01), Aehnelt et al.
Debitsch Rasmus
Enderle Eckhard
Muller Helmut
Carl-Zeiss-Stiftung
Melnick S. A.
Shaw Dale M.
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