Two positions - one hole (question about drawing)

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  • Two positions - one hole (question about drawing)

    Hi guys !
    Faced with a measurement so far incomprehensible to me.
    For one and the same hole, two positional measurements are proposed, but with different tolerances. I haven’t seen this before, but before reporting a drawing error, I need to make sure that this is indeed the case. Has anyone seen something similar, or what can be done about it?
    If additional information is needed, I will provide it without any problems. 111.jpg

  • #2
    One is to make sure that the hole is positioned correctly. The other is make sure that holes are good to each other. It should have been a composite FCF.
    Darroll
    2018R2

    Comment


    • Vladimir
      Vladimir commented
      Editing a comment
      I also thought about the composite FCF, but in both dimensions the bases are the same, maybe I don’t understand something...

    • UKCMM
      UKCMM commented
      Editing a comment
      Not sure that's right this is a rectangular zone to one hole only with two limits perfectly acceptable IF you drop the dia symbol.

    • Vladimir
      Vladimir commented
      Editing a comment
      UKCMM thanks for the help, I will definitely take note !

  • #3
    If the control frames are exactly as drawn then it's an error (or the one with the looser tolerance is redundant).

    Is there definitely a Ø sign proceeding the tolerance?

    Automettech - Automated Metrology Technology

    Comment


    • Vladimir
      Vladimir commented
      Editing a comment
      yes, there is this Ø sign

    • UKCMM
      UKCMM commented
      Editing a comment
      Then you need to go back to the engineer and explain this is wrong.

    • Vladimir
      Vladimir commented
      Editing a comment
      Interestingly, this is a drawing of our client, about which we said that only their designers are never mistaken in the drawings

  • #4
    I will give a more complete version of my drawing, maybe this will clarify the situation more


    https://www.pcdmisforum.com/image/gif;base64,R0lGODlhAQABAPABAP///wAAACH5BAEKAAAALAAAAAABAAEAAAICRAEAOw==
    Last edited by Vladimir; 04-24-2020, 02:30 AM.

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    • #5
      This is what the engineer appears to be trying to describe.
      Attached Files

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      • Vladimir
        Vladimir commented
        Editing a comment
        Excellent! I understood. Apparently, in fact, an error in the drawing with a sign of diameter. Thanks !

    • #6
      I create this measurement, but I doubt the settings of my FCF
      When I made a composite measurement, it gave 0 in meas in second FCF, so I made two separate ones and this is what happened. but I always doubt everything and this measurement is no exception
      I am attaching a version of my drawing in full accordance with the original drawing (changed the purpose of the datums)​​​​​​​

      123.jpgIMG_20200424_093820.jpg

      Comment


      • UKCMM
        UKCMM commented
        Editing a comment
        You appear to have X and Z selected in the advanced tab only select the axis you need, also not sure why you have a shift in the Z.

      • Vladimir
        Vladimir commented
        Editing a comment
        Thanks for the amendment! In fact, I did everything wrong. Now everything fell into place. You helped me a lot

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