Error determination apparatus, error determination method, and storage medium

An error determination method of determining a measurement error that occurs when a workpiece is measured by a coordinate measuring machine, performed by a computer, the method comprising:

• acquiring a) motion error information indicating a result of measuring a motion error due to at least one of a scale error, a translational error, or a rotational error at a time of measuring in advance in a plurality of positions in a space that can be measured by the coordinate measuring machine, b) design information of the workpiece, and c) position information indicating a location of the workpiece in the coordinate measuring machine;
• determining a measurement position on the workpiece on the basis of the design information;
• determining a measurement error occurring in the measurement at a contact position of a stylus included in a probe in a Cartesian coordinate system of the space that can be measured by the coordinate measuring machine and specified on the basis of the location of the workpiece and the measurement position due to the motion error occurring in the contact position by referencing the motion error information;
• and
• outputting the determined measurement error.

A non-transitory recording medium storing a program for causing a computer to determine a measurement error that occurs when a workpiece is measured by a coordinate measuring machine, the program causing the computer to implement functions comprising:

• acquiring a) motion error information indicating a result of measuring a motion error due to at least one of a scale error, a translational error, or a rotational error at a time of measuring in advance in a plurality of positions in a space that can be measured by the coordinate measuring machine, b) design information of the workpiece, and c) position information indicating a location of the workpiece in the coordinate measuring machine;
• determining a measurement position on the workpiece on the basis of the design information;
• determining a measurement error occurring in the measurement at a contact position of a stylus included in a probe in a Cartesian coordinate system of the space that can be measured by the coordinate measuring machine and specified on the basis of the location of the workpiece and the measurement position, due to the motion error occurring in the contact position by referencing the motion error information;
• and
• outputting the determined measurement error.