GEOMETRIC-ERROR IDENTIFICATION SYSTEM AND GEOMETRIC-ERROR IDENTIFICATION METHOD

摘要

A geometric-error identification system includes a control unit configured to identify geometric errors in a machine. The machine controls three or more translational axes and one or more rotation axes so as to perform positioning for a positional relationship between a main spindle and an object. The control unit controls the rotation axis so as to index a measurement object jig, measures an indexed position of the indexed measurement object jig on a three-dimensional space using a position measurement sensor attached to the main spindle so as to acquire a measurement value, and identifies geometric errors of the machine related to the translational axis and/or the rotation axis based on the measurement values in a plurality of positions. The control unit measures an initial position of the measurement object jig and performs calibration of the position measurement sensor using an initial measurement value acquired for measuring the initial position.

主权项

1. A geometric-error identification system comprising
a control unit configured to identify geometric errors in a machine, the machine including a main spindle, the machine being configured to control three or more translational axes and one or more rotation axes other than the main spindle so as to perform positioning for a positional relationship between the main spindle and an object, the control unit being configured to: control the rotation axis so as to index a measurement object jig in a plurality of positions; measure an indexed position of the indexed measurement object jig on a three-dimensional space using a position measurement sensor attached to the main spindle so as to acquire a measurement value; and identify geometric errors of the machine related to at least one of the translational axis and the rotation axis based on the measurement values in the plurality of positions, wherein the control unit is configured to measure an initial position of the measurement object jig and perform calibration of the position measurement sensor using an initial measurement value acquired for measuring the initial position.