Measurement Comparison for Product Roundness Testing

The main products of Delta Electronics Co., Ltd. are fans and motors. Their common features are rotating components. The roundness of the components affect quite huge on the characteristics of the products. Therefore, our company is very concerned about the roundness measurement of the components. For this purpose, we purchased several roundness measuring instruments to assist the production line in measurement. Nevertheless, due to various instrument brands and models, it leads to measurement results of the same product in different roundness instrument may be not the same. This affects the quality of the products greatly. After detailed and deep analysis, we found that the main reason is due to the inconsistent of the measurement standards. Thus, we used a calibrated roundness standard to calibrate all the roundness measuring instruments. After that, we used a check standard to be measured its roundness by each roundness measuring instrument. We compared the measurement results of each instrument and found that the roundness measured results are very close. This implies that the use of consistent measurement standards is very important in measurement traceability. After a 5-year of continuously calibration for the roundness measuring instruments, the feature of our components and products is more consistent and the quality is furthermore promoted.