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All tolerances are non-accumulative 1

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genes

Civil/Environmental
Mar 21, 2002
7
I am performing a loop stackup tolerance study on a sheetmetal assembly that has some assembly issues and have encountered an interpretation conflict. The note in the subject line is on every drawing. Before the firestorm of criticism begins, I was a student of Alex Krulikowski's in Michigan so I know what needs to be done with these drawings. That refinement isn't going to happen at this company. My question is, is this note a crude attempt at basic dimensioning? I was instructed, in no uncertain terms, that the hole you examine has +/-.030 for location and is not influenced by the previous hole to hole dimensional location tolerances. One can see the problem with this logic in a stackup if I have to disregard the previous location tolerances. Has anyone dealt with this kind of situation or could recomend a good shrink? Perhaps a source noting how wrong this drawing note is?
 
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