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If you are using runout as your dimension, then what you are seeing is the form error (roundness) factored in with the amount of position error of the first feature selected (no form error is figured on the second feature).

When you select them in the opposite order, you then see the form error included with the position error of the other diameter. That is why it is important to select in the correct order based on the drawing requirement,

FYI - concentricity does not work this way because it evaluates the axis' of the feature.

2009-04-01, 01:17 PM	#3
cad13992 初级会员注册日期: 09-03 帖子: 13 精华: 0 现金: 189 标准币资产: 189 标准币	回复: 【转帖】Runout conflict If you are using runout as your dimension, then what you are seeing is the form error (roundness) factored in with the amount of position error of the first feature selected (no form error is figured on the second feature). When you select them in the opposite order, you then see the form error included with the position error of the other diameter. That is why it is important to select in the correct order based on the drawing requirement, FYI - concentricity does not work this way because it evaluates the axis' of the feature.