Artifact and method for verifying accuracy of a positioning apparatus
AssigneeAlpha Q, Inc.
InventorWilliam A. Watts
Life of this patent
Estimating the term…
Abstract
A gage master artifact and method for verifying calibration of machine tools and other positioning apparatus such as a coordinate measuring machine wherein measurements are taken of bore sizes and lengths of the artifact in different orientations within the coordinate field of the apparatus by a probe of that apparatus and comparing such measurements with known measurements of the artifact to verify calibration accuracy of the apparatus.
Claims3
For use in verifying calibration of a positioning apparatus having a work-contacting touch probe and computer programmed calibration data established for different probe orientations, a gage master artifact comprising
- a flat rigid plate having a generally triangular peripheral configuration, and
- an array of probe contact apertures formed in the plate with each of the probe contact apertures being formed adjacent a corner of the plate,
- the probe contact apertures comprising three circular openings formed to extend through the plate and defining a corresponding pattern of preselected points spaced apart from one another at precisely predetermined linear distances establishing standard dimensional values wherein line projections between such points form a right angle at one of said preselected points,
- the probe contact apertures each having a circular wall defining a peripheral profile engageable with a probe of a positioning apparatus for comparing its measurements with the known configuration of the artifact for verifying the integrity of the positioning apparatus calibration.
Dependencies are inferred from the claim text.