Portal de Periódicos da CAPES

Construction of an error map of rotary axes on a five-axis machining center by static R-test

2010; Elsevier BV; Volume: 51; Issue: 3 Linguagem: Inglês

10.1016/j.ijmachtools.2010.11.011

1879-2170

Soichi Ibaraki, Chiaki Oyama, Hisashi Otsubo,

Scientific Measurement and Uncertainty Evaluation

This paper proposes an efficient and automated scheme to calibrate error motions of rotary axes on a five-axis machining center by using the R-test. During a five-axis measurement cycle, the R-test probing system measures the three-dimensional displacement of a sphere attached to the spindle in relative to the machine table. Location errors, defined in ISO 230-7, of rotary axes are the most fundamental error factors in the five-axis kinematics. A larger class of error motions can be modeled as geometric errors that vary depending on the angular position of a rotary axis. The objective of this paper is to present an algorithm to identify not only location errors, but also such position-dependent geometric errors, or “error map,” of rotary axes. Its experimental demonstration is presented.