All position-independent and position-dependent geometric error measurement and identification of the precision of a horizontal boring machine tool

Geometric error is the main obstacle that affects quasi-static accuracy of horizontal boring machine tools. To improve performance, terms all position-independent geometric errors (PIGEs) and position-dependent (PDGEs) must be measured identified precisely. This study proposes a novel method for measuring identifying above two types based on double ballbar rotary axis. The linear axis are from measurement model exponential product preset measure trajectory, coordinate system combined with reference to lower uncertainty in identification accuracy. Then, elastic net improved weight function IGG3-LTS established identify PIGEs PDGEs axes, respectively. has advantage built-in sensor synchronously does not interfere running state tool, neither inaccuracy reference-frame misalignment nor installation instrument results Moreover, PDGEs, particular determined accurately. strategy demonstrated by experimental comparison four-axis precision tool. minimum compensation rate each index test specimen 40.0%, average 52.7%, maximum 62.5%.