How to correctly establish the coordinate system of the image measuring instrument Metus software

by:Sinowon     2021-05-12

Using a complex image measuring instrument and light source system, in order to finally obtain a correct inspection report, it is necessary to understand how to establish a correct part coordinate system. The purpose of establishing the coordinate system is to provide a reference direction for the size calculation when measuring parts. Usually, we establish the coordinate system based on the datum given by the engineer. The establishment of the wrong coordinate system will directly lead to the error of the measurement size. If you want to get the correct inspection report, you must understand how to correctly establish the coordinate system. The correct coordinate system is the basis for subsequent measurements. The establishment of the wrong coordinate system will directly lead to the wrong inspection report.

Therefore, it is very necessary and important to establish a correct reference direction. Usually, we do not create a coordinate system arbitrarily. When establishing the coordinate system, the characteristics of the coordinate system we choose to establish will have the following requirements: ①Meet the requirements of test parts; ②Meet the batch inspection of similar products, and can be repositioned; ③Meet the benchmark requirements of assembly, processing and design. After confirming that these requirements are correct, the operator of the image measuring instrument can establish a coordinate system. Usually, the method of establishing a coordinate system is wired coordinate, line-circle coordinate, circle-circle coordinate and four-sided division Coordinates, which is the conventional method of constructing coordinate system.

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