A Study of the Application of Volumetric Compensation by Direct and Indirect Measurement Methods

Abstract

The present article deals with the measurement methods based on experimental tests and their impact on the resultant volumetric error of CNC machine tools (MT). Volumetric error compensations represent a promising technology to increase the production accuracy of machine tools. This article studies direct and indirect methods to measure the volumetric accuracy on a MT. The assessed parameters are not only the resultant volumetric error of the machine, but also time consumption of measurement, repeatability, and evaluation of individual geometric errors. Finally, recommendations are made to improve the effect of volumetric errors compensation using the above-mentioned methods for three-axis MT.

Research on geometric error modelling and decoupling of machine tool based on NURBS projection curve

“…Although the use of laser interferometer, probe and other instruments for error identification can also be more convenient for space measurement, because there is no space closed loop, it is easy to cause the loss of error accuracy in Measurement Engineering, resulting in inaccurate error decoupling. The double ball bar instrument can overcome this problem, but it generally identifies the interpolation of two axes or less [16][17][18]. Or it needs to be assembled many times to produce assembly error, which needs additional identification or compensation [19].…”

Influence of the Volumetric Accuracy of Machine Tool on the Working Space Size

“…Tracking interferometers, such as the LaserTRACER measuring devices and the Laser trackers described in the publications [Aguado 2012] and [Linares 2014] are most commonly used to measure machine volumetric accuracy. Furthermore, devices such as multiple beam interferometers are described in [Holub 2019A]. The main focus of publications [Schwenke 2009] and [Holub 2017] is to find a way how to implement the volumetric compensations as quickly as possible, Furthermore, it is necessary to have access to the machine to appropriately set up monitoring of the ambient conditions of the machine in order to minimize measurement uncertainty in terms of results [Holub 2019B].…”