Center method
Center method
(OP)
Can somebody describe the Alternative "Center Method" for MMC or LMC in plain English? I am not sure how it works.
Thanks
Thanks
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RE: Center method
Hope that doesn't cloud it up any worse for you. Without being able to use graphics, it's hard to explain.
RE: Center method
http://www.tec-ease.com/tips/november-98.htm
and see if that clears it for you.
RE: Center method
"This means the four-hole pattern may shift out of position in one direction while the datum feature shifts in the other direction as shown. A very common error made at inspection is to use this allowed datum shift as a bonus on the features being controlled. This would allow the features to be out of position to each other more as the datum feature departs from MMC.
I have seen a lot of cases where people working at various inspection houses mis-apply this by adding the datum bonus directly to the feature. Doing so can allow the features to move away from each other, while looking good on paper, it destroys the integrity of the pattern itself.