Alternative model (optional)

Notice

The application requires expert knowledge and is not necessary in normal use. This alternative model may prove useful for customers to develop their own measurement cycles.

Position errors in the rotary axes (see Section “Parametric model in accordance with DIN ISO 230 and ISO TR 16907”) are regarded as “average values” of the associated component errors in the literature* on measurement/calibration of machine tools.

In this model, the rotation takes place around an ideal axis and afterwards the motion is subjected to location and component errors in the same manner. In default mode, the ISG implementation follows this model and is therefore compliant with the calibration models of third-party vendors.

However, the parameter in the compensation list

alternative_model            1

switches to an alternative model for the position errors of rotary axes. In this alternative model, the main rotation actually takes place about a distorted axis and any component errors then affect the rotary motion.

* Soichi Ibaraki, Yusuke Ota, "A machining test to calibrate rotary axis error motions of five-axis machine tools and its application to thermal deformation test", International Journal of Machine Tools & Manufacture 86 (2014), 81-88