2021/6/30,SCUT,1,A reference is used to define the position of other points, lines or surfaces of the part. It is also called the positioning reference datum,3.4 selection of reference(datum,基准,3.4.3 Calculation of location error,In order to ensure the machining quality, the following formula must be ensured, here, the sum of errors caused by different factors. the tolerance of the workpiece to be machined,2021/6/30,2,SCUT,In this section, only the location errors related with the design of jigs
