[To...] Posted April 2, 2020 Share Posted April 2, 2020 Can anyone explain the differences between ASME Y14.5-2009 ( and newer) and ISO when it comes to Profile. Link to comment Share on other sites More sharing options...
[Ri...] Posted April 2, 2020 Share Posted April 2, 2020 Please sign in to view this quote. I'll dig back through my AUKOM GD&T book, but I don't believe there are any differences in the Profile evaluation itself. The biggest differences are in the DRF construction. Link to comment Share on other sites More sharing options...
[To...] Posted April 2, 2020 Author Share Posted April 2, 2020 I found this online but didn't see anything regarding DRF. . . Link to comment Share on other sites More sharing options...
[Ri...] Posted April 2, 2020 Share Posted April 2, 2020 As far as I can tell, there is no difference in the evaluation itself. It is still the maximum distance between the extracted profile and the nominal profile. I've never seen what you've shown, and I don't know why you'd ever do that. It makes no sense. All of the examples for ISO & ASME show the profile tolerances to be exactly shaped like the nominal profile. The only differences arise from describing what type of profile it is (unilateral, and to what side). Regarding the DRF - I was referring to how Datums are built in ASME vs ISO. I'll attach a long snippet of an email that I sent out a couple of years ago. Please sign in to view this quote. Link to comment Share on other sites More sharing options...
[An...] Posted April 3, 2020 Share Posted April 3, 2020 One thinkable difference - see attached.Contribution_03_04_2020_1.pdf Link to comment Share on other sites More sharing options...
[To...] Posted April 3, 2020 Author Share Posted April 3, 2020 The plot thickens.... My original question was asked by our customer but I didn't know the underlying reason. It turns out that their vendor is using PC-DMIS and the question of how standard bi-lateral profile is calculated. So, Calypso is using max deviation times 2 and PC-DMIS is adding Max and Min deviation, if I understand correctly though I've heard it a hundred times. Open the flood gates.... Link to comment Share on other sites More sharing options...
[Ri...] Posted April 3, 2020 Share Posted April 3, 2020 Using the Range is wrong!! Link to comment Share on other sites More sharing options...
[Ri...] Posted April 3, 2020 Share Posted April 3, 2020 Using the Range is assuming that it is a Form only tolerance, and that is incorrect. Link to comment Share on other sites More sharing options...
[An...] Posted April 3, 2020 Share Posted April 3, 2020 Please sign in to view this quote. R.S. is right. See attachedContribution_03_04_2020_2.pdf Link to comment Share on other sites More sharing options...
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