Active error compensation in a coordinated measuring machine

Details Active error compensation in a coordinated measuring machine Active error compensation in a coordinated measuring machine

1985-09-19

1987-05-12

Little, Willis

Geometrical instruments

Miscellaneous

Light direction

33503, G01B 502

Patent

active

046638520

ABSTRACT:
An error compensated, coordinate measuring machine includes a ram, a supporting structure for the ram and a base on which an object or part to be inspected is secured. The ram is mounted to the structure and movable with respect thereto. An object sensing probe is mounted to the ram. The probe is responsive to contact with the part or object being tested. Sensors are mounted to the ram and the base. The sensor on the ram detects the angular deviation of the ram from a reference plane, and the sensor on the base detects the angular deviation of the base from the same reference plane. A calculator unit determines the difference between the angular deviations of the ram and the base from the reference plane. The machine further includes transducers which measure the position of the ram with respect to the supporting structure, and the position of the supporting structure with respect to the base. The transducers provide ram positional data. A compensating unit adjusts the ram positional data proportionally to the difference between the angular deviations of the ram and the base.

REFERENCES:
patent: 4007544 (1977-02-01), Kirby et al.
patent: 4060906 (1977-12-01), Heizmann
patent: 4276698 (1981-07-01), Dore et al.
patent: 4391044 (1983-07-01), Wheeler
patent: 4525930 (1985-07-01), Bury
patent: 4597182 (1986-07-01), Rinn

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