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Another ASME profile question Ugh!

I know this gives people brain aneurisms as it does for me, so I'm just asking for opinions. I've looked at numerous threads on this to the point my head is going to explode. I have a blueprint that says, "Blueprint interpretation, ASME Y14.100" in the notes. Underneath that it says, "Dimensioning and tolerancing: ASME Y14.5".

I thought in ISO you doubled the worst points deviation. But my AMSE 14.5 is doubling it in GEOTOL. What is correct these days? Double it or just min-max? By the way I
'm running 2020 R2. Was this changed in later version?

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  • In PC-DMIS 2018, using FCF dimensions, ASME. (Just an exaggerated example here) if deviations range from plus 11.001mm to plus 11.010mm, PC DMIS reports the profile as 11.010, rather than 22.020. That's wrong, and always was wrong.

    In the case of that particular software version, switching to ISO, reported values are now 22.020. That's right, and always was right. (edited for typos)


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  • Isn't the Y14.5 MEAS value reporting as 11.010 in your photo? Like Neil said, with pre-2020 R2 you must report min and max as Y14.5.1-1994 defines the actual value for profile. The rules for the MEAS value calculation pre-2020 R2 were rules established by Hexagon, and maybe that's where you're caught up, but min and max paint the whole picture. Post-2020 R2, the MEAS value calculation essentially matches that defined by ISO.
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  • Isn't the Y14.5 MEAS value reporting as 11.010 in your photo? Like Neil said, with pre-2020 R2 you must report min and max as Y14.5.1-1994 defines the actual value for profile. The rules for the MEAS value calculation pre-2020 R2 were rules established by Hexagon, and maybe that's where you're caught up, but min and max paint the whole picture. Post-2020 R2, the MEAS value calculation essentially matches that defined by ISO.
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