Research of Sampling Spacing in Measuring Straightness Based on CMMHou XuefengHou XuefengAbstract:The sampling spacing in measuring straightness is researched based on three coordinate measuring machine. According to the sample data the least-square method is used to evaluate the straightness error, the evaluated resuhs are analyzed and compared, then the connections of sampling spacing in measuring straighmess with dimension and precision are gained, also the future research directions and contents are presented.[著者文摘]