Proposing a method of using computer vision to evaluate the accuracy of the IRB 4600 robot arm at the National Center for Technological Progress (Nacentech)

Abstract

Metal material processing equipment systems with 6-axis robot arms using laser radiation are widely used in industry for processing 3D-shaped metal products. To evaluate the technical specifications of a 6-axis robot system for cutting metal materials using laser radiation, it is necessary to analyse and evaluate the parameters of each component block of the system. For 6-axis robots, one of the most important parameters determining the quality of the robot arm is the accuracy of the displacement path during the robot arm motion control. In this article, we present a method for evaluating the displacement accuracy of robot arms through two parameters, when using computer vision: displacement coordinates and displacement distance. This is an evaluation method with high accuracy and a fast experimental setup, suitable for laboratory conditions in Vietnam. The actual measurement results compared with the data provided by the manufacturer show that the computer vision solution fully meets the accuracy requirements. This result exhibits that the automatic programmer records the robot arm's displacement coordinates accurately, instantly and when compared with the original coordinate scale/table, it meets the problem requirements.