Patent ID: 9310177
Filing Date: 2016-04-12
CPC Classification: G01B

Claim Text:
1. A method of correcting measurement data of a coordinate measuring machine by a processor for implementing the following steps, the coordinate measuring machine comprising: a table on which an object is to be mounted; a ram that has an end attached with a probe in an exchangeable manner; a three-dimensional movement mechanism that is configured to move at least one of the ram and the table in an X-axis direction, a Y-axis direction and a Z-axis direction that are perpendicular with one another to cause a relative movement between the table and the ram in a three-dimensional direction; and a controller that is configured to control the three-dimensional movement mechanism to measure a measurement data when the probe is brought into contact with the object mounted on the table, the method comprising: measuring a geometric error that occurs in the three-dimensional movement mechanism when a reference weight corresponding to a reference probe is applied to the ram; storing in a storage section a reference correction parameter for correcting the measured geometric error; inputting weight information of the probe attached to the ram; calculating a correction factor from the inputted weight information and the reference weight corresponding to the reference probe; calculating a correction parameter for the probe attached to the ram from the correction factor and the reference correction parameter stored in the storage section; and measuring the measurement data and correcting the measurement data with the calculated correction parameter.