Calibration system for coordinate measuring machine
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United States of America Patent
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-
Nov 3, 1998
Grant Date -
N/A
app pub date -
Sep 1, 1995
filing date -
Sep 1, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A calibration system for measuring position errors in a coordinate measuring machine having a fixed table and a movable element is provided. The system includes a straightedge assembly attachable to the table and a sensing fixture attachable to the movable element. The straightedge assembly includes a straightedge having a first reference surface that is parallel to a predetermined direction and a second reference surface perpendicular to the first reference and parallel to the predetermined direction. The sensing fixture includes a fixture housing and sensors on the housing for sensing the position of the movable element relative to the straightedge and generating position error signals representative of position errors of the movable element as the sensing fixture is moved in the predetermined direction along the straightedge. The sensors provide position error signals representative of displacement, straightness, pitch, yaw and roll errors of the movable element. Linear variable differential transformers may be used for sensing straightness, pitch, yaw and roll errors.
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