Method and apparatus for determining and correcting guidance err

Details Method and apparatus for determining and correcting guidance err Method and apparatus for determining and correcting guidance err

1982-12-01

1986-05-06

Krass, Errol A.

Boots, shoes, and leggings

318569, 356152, 364170, 364474, 364571, G05B 1918, G01B 1126

Patent

active

045876223

ABSTRACT:
Two methods are disclosed for eliminating the influence of guidance errors on the precision of determining the position of guided machine parts as in a coordinate-measuring machine, whereby the resulting measurement may be provided with a correction which is dependent on the guidance error. In a first method of the invention, the relevant guidance errors of the machine are determined and approximated by correction functions which are stored in the computer of the machine; the stored correction functions are used for automatic correction of errors otherwise inherent in operation of the coordinate-measuring machine. In a second method of the invention, additional measuring devices are mounted to displaceable parts of the machine, and these devices respond to changes in offset distance from reference surfaces arranged parallel to applicable coordinate guides; these measurement devices provide continuous detection of guidance errors, throughout the measurement process.

REFERENCES:
patent: 3182375 (1965-05-01), Hoffrogge
patent: 3546671 (1970-12-01), Rogert et al.
patent: 3694089 (1972-09-01), Rantsch
patent: 3749501 (1973-07-01), Wieg
patent: 3831283 (1974-08-01), Pagella et al.
patent: 4047025 (1977-09-01), Lemelson
patent: 4362977 (1982-12-01), Evans et al.
patent: 4370721 (1983-01-01), Berenberg et al.
patent: 4481592 (1984-11-01), Jacobs et al.

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