Coordinate measuring machine with improved table support

Details Coordinate measuring machine with improved table support Coordinate measuring machine with improved table support

1991-04-22

1992-12-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

33503, 33 1M, G01N 2186, G01B 503

Patent

active

051736136

ABSTRACT:
A coordinate measuring machine (10) having a three point support for a work supporting table (24) mounted over a base (12) constructed of a thermally dissimilar material. A first fixed support, (26A) and a laterally compliant second support (26B) are located at the front of the machine. The second front support (26B) is comprised of a pair of webs (28) oriented to be compliant in the lateral direction to allow relative thermal growth between the table (24) and base (12) while being rigid in the longitudinal direction to prevent rotation of the table (24) about the fixed front support (26A). Stacked crossed roller bearings (38A, 38B) provide a frictionless third point of support at the rear of the table (24).

REFERENCES:
patent: 4594791 (1986-06-01), Brandstetter
patent: 4763420 (1988-08-01), McCabe et al.
patent: 4852267 (1989-08-01), Tezuka
patent: 4964220 (1990-10-01), Orr et al.
patent: 5063683 (1991-11-01), Bury

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