Xact Measure problem

Has anyone had problems with Xact Measure TP dims? I have various parts with MMC on the DF as well as the Datums. As may be expected the DF and the datums all have different size tolerances. When setting up the dimension I tolerance them correctly, but once created the datum tolerances default to the DF tolerance. I have assigned variables for tolerances with little success. In fact I can type in the correct tolerance right into the dimension in the edit window and.. pfft... it reverts back to the DF tol. I am attempting to use this "improved" method because the hexagoon's say that legacy TP dims don't account for MMC on the datums correctly. WTF!

I am running V4.2mr2, but I have seen this in 4.1 and 4.2mr1.

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Jan d. over 17 years ago

Yes, that's exactly what you would use. This becomes very important if you have multiple TP calls with EXACTLY the same datum call. You have to use simultaneous evaluation unless the print states otherwise.

I was told that PC-DMIS will take all features and tries to find a datum shift that creates a "go" situation for all the holes. If it finds one, it will use that datum shift and report all other features to that datum shift.

I tried it and, again, in my humble opinion, it seems to work!

Jan.
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Jan d. over 17 years ago

Yes, that's exactly what you would use. This becomes very important if you have multiple TP calls with EXACTLY the same datum call. You have to use simultaneous evaluation unless the print states otherwise.

I was told that PC-DMIS will take all features and tries to find a datum shift that creates a "go" situation for all the holes. If it finds one, it will use that datum shift and report all other features to that datum shift.

I tried it and, again, in my humble opinion, it seems to work!

Jan.
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