Posted by Don Laughery (188.8.131.52) on December 22, 2002 at 13:06:46:
In Reply to: Composite position tolerance posted by Luis on November 20, 2002 at 20:05:54:
: Greetings everyone,
: I'm having a difficult time understaing the whole concept about composite position tolerance. Can someone please explain to me how to get the pattern-locating tolerance zone? I know how to calculate the feature-relating tolerance zone but I have no idea on how to calculate the pattern. Are there any specific formulas you can share with me?
The bottom line of a composite true position
Tolerance frame is the "floating" tolerance.
It's the relationship of the pattern elements
only to the pattern, and is most efficiently
checked with a fixed ("idiot") gage. It can be
done with open setup, but the calculations are
extremely difficult. Another method would be the
use of papergaging. This is not all that well-
known, and to fully wring out a pattern can be
more than a little time-consuming. I have a
GW-Basic program which will do it, but since I
wrote it for my own use, the use of it may be a
bit non-intuitive for others. I would be glad to
email a copy to anyone who asks. Who knows, it
might actually solve your problem.
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