yogy

圆跳动——全跳动
Runout - Circular vs Total
http://www.dimcax.com/gdt_web/march-00.htm

Keep Your Runouts Straight!

如下图所示，
圆跳动——被测圆柱特征的任一截面，若某一截面的误差变动范围最大，则此截面对应的最大变动量0.03为圆跳动误差。
全跳动——对于整个被测圆柱特征，所有截面中的最大的误差（＋0.02）和最小的误差（－0.09）之差0.11为全跳动误差。
Confusion continues to exist over the difference between circular runout (one arrow) and total runout (two arrows). To inspect the two runouts illustrated below, an inspector could set up the inspection as illustrated. While rotating the part on the pin, several slices along the part could be inspected.

The worst circular runout error occurs at the slice with the greatest variation. In this case two slices vary a total of 0.03.

Total runout is the difference between the highest and lowest readings found over the entire feature. The highest reading was +0.02 and the lowest reading was -0.09. Therefore, the total runout for the feature is 0.11, the difference between +0.02 and -0.09.

In this case the part would pass both runout checks.