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Creating a dimension with MMB

António Gualdino
Hi there,

I need help. I've received a ASME drawing in inches from a client (i usually work on ISO and with mm) and they've demanded that I measure a position with the MMC condition in the hole and for each datums (B and C).
The thing is that i don't know what values i have to put in the datum MMC size and why the third datum (C) appears like a plane in the repport when actually is a hole?

What i need to know is what values do i have to put in the datum MMC size and why the third datum have to be a plane for pc-dmis?


Attached is the dimension requirement.

Thanks in advance.

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  • If you want to use the MMB for the datums, you will need to put in the size. The tolerances are added in the Advanced or Nominals tab, as bfire85 mentioned(it's good to tell us what version of PC-DMIS you are using as things change from version to version.)

    I see the tertiary datum look like C does when it's not facing the same direction as the primary and secondary datums, like a side hole.
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  • If you want to use the MMB for the datums, you will need to put in the size. The tolerances are added in the Advanced or Nominals tab, as bfire85 mentioned(it's good to tell us what version of PC-DMIS you are using as things change from version to version.)

    I see the tertiary datum look like C does when it's not facing the same direction as the primary and secondary datums, like a side hole.
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