With the advancement of modern manufacturing technology and the increasing demand for high-precision and high-efficiency machining, five-axis machine tools have been widely applied in aerospace, automotive manufacturing, and other industries. However, high-precision machining also introduces complex challenges in error control, which directly affect product quality and machine tool lifespan. Therefore, the measurement of errors in five-axis machine tools has become an important research topic.
This article explores the positioning accuracy of Tsudakoma’s cradle-type tilting axis, measured using an angular swing inspection instrument. It compares the differences between enabling and disabling the angle encoder. Results show that when the encoder is enabled, positioning accuracy and repeatability are excellent, with compensated error reduced to 4.7 arc-seconds. When the encoder is disabled, non-linear errors occur within the ±10° range, reaching up to 155 arc-seconds. The study indicates that 1° incremental measurement can reveal structural characteristics, providing valuable reference for five-axis machine development.
This study investigates the accuracy of domestic five-axis machine tools, measuring linear axis six degrees of freedom, rotary axis positioning, circular interpolation, spatial diagonal accuracy, and tool-tip synchronous motion. Results indicate most machines meet ISO 10791 standards, with some achieving half the tolerance limits. Rotary axis errors are linked to geometric accuracy, rotary center alignment, and control parameters. Compensation and parameter adjustments are recommended to optimize precision and enhance machining quality.
