Method and means for controlling a coordinate-measuring instrume

Details Method and means for controlling a coordinate-measuring instrume Method and means for controlling a coordinate-measuring instrume

1987-07-10

1989-05-30

Lall, Parshotam S.

Boots, shoes, and leggings

364513, 36447435, 33503, 33504, 901 44, 901 46, G06F 1546, G01B 520

Patent

active

048357189

ABSTRACT:
In the automated performance of multiple measurements on each of a succession of workpieces, the invention contemplates establishing a plurality of safety-reference positions (S.sub.1 to S.sub.7) along the programmed displacement path intended for the probe head (10) and its work-contacting probe pin. Any one of a variety of error signals developed in the course of conducting the measurement program on a given workpiece is operative to temporarily stop further conduct of the program and to instigate a repeated attempt to successfully traverse the part of the program in which the error signal occurred. The repeated attempt involves retracting displacement of the probe head back to the most-recently traversed safety-reference position, and if the repeated attempt produces the same error signal the probe head is returned to the most-recently traversed safety-reference position and is then caused to by-pass the error-signal part of the program by displacement to a succeeding safety-reference position, for completion of the remaining fraction of the measurement program on the given workpiece.

REFERENCES:
patent: 4118871 (1978-10-01), Kirkham
patent: 4415967 (1983-11-01), Russell
patent: 4472782 (1984-09-01), Suzuki
patent: 4575791 (1986-03-01), Schwefel
patent: 4653011 (1987-03-01), Iwano
patent: 4679159 (1987-07-01), Yamazaki et al.
patent: 4713517 (1987-12-01), Kinoshita

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