Research On Roundness Measurement Of Experimental Device

Modern precision processing technology needs a higher demand for the measurement of roundness error.This paper designs the circular experimental measurement devices which takes full advantage of computer technology, including their structure design and software design. For the installations using the stepper motor control and the inductors probe using contact measurement, the structure is simple and easy to analysis the source of the error. Adopting the virtual instrument software platform that is to say Labview which is used widely in the industry, we achieve data acquisition, least-squares round, three-point method software and the implementation of displaying the contour of the workpiece using this graphical programming language.This paper gains the software methods of the roundness error of harmonic analysis for the following subsequent error separation experiments which makes full use of computer data powerful computing power and designs a harmonic analyzer using this software platform .In conjunction with the harmonic analysis software, this experiment is completed separately using the least square circle method, the three-point method, multi-step method and other methods.This paper achieves optimization of the round of least-squares and three methods after many experiments, which has obvious improvement comparing with the foregoing methods, proving the validity of the optimization.The experimental device hardware and software owning the basic functions for the measurement of roundness, combining error separation method and data processing software can achieve better performance measurement, which creates foundation for more in-depth analysis of the error sources and the amendment of the system.