Bridge type coordinate measuring machine

Details Bridge type coordinate measuring machine Bridge type coordinate measuring machine

G - Physics

01

B

33/179

G01B 5/02 (2006.01) G01B 5/00 (2006.01)

Patent

CA 1233635

ABSTRACT: A Bridge Type Coordinate Measuring Machine A bridge type coordinate measuring machine characterized by a bridge (20) that has a closed loop configuration encircling the measuring machine base (10). The bridge (20) includes two uprights (21, 22), an upper member (23) connecting the uprights together above the upper surface (11) of the workpiece table (14) and at least one lower member (24) connecting the uprights together below the workpiece table surface (11). Bearings (41) for the bridge (20) coact upwardly, downwardly and inwardly with a guideway (12, 13) located on each side of the base (20). This arrangement both stiffens and raises the resonant frequency of the bridge, thereby improving the measuring accuracy and repeatability of the coordinate measuring machines performance. Preferably, the lower member (24) that connects the uprights together is above the ways (12, 13) and below the upper surface (11) of the work table (14) of said base (10). This arrangement also provides for easy assembly of the bridge (20) onto the base (10). (FIGURE 5)

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