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Recent content by dstokesag

  1. dstokesag

    Perpendicularity of a flange surface to a bore ID datum

    Okay this is great but I still don't know what big N is to figure out what it is for my part to do the cylinder. Any other ideas as to where I can find that?
  2. dstokesag

    Perpendicularity of a flange surface to a bore ID datum

    Please explain what you mean by they selected N=30 just like that? Also my part is a circular flange not a square plane (OD is 406mm and ID is 311.61mm so the width of the flange is 47.195mm) The flange has 16 10.5mmdiameter holes on a 387.35mm bolt hole pattern). So the square plane number of...
  3. dstokesag

    Perpendicularity of a flange surface to a bore ID datum

    Thank you pmarc for this clarrification and that is what I thought. I opened your attachment for the number of points for a feature with the calculation and have a question in the example. What is "N"? I see the radius as "r" and the height of the cylinder "h" but don't know where they are...
  4. dstokesag

    Perpendicularity of a flange surface to a bore ID datum

    Okay additional question now. The flange face has typical profile or flatness error of the surface. This error increases the perpendicularly error the more points you add when checking the face. So am I correct in statin that you cannot subtract your profile or flatness error from your...
  5. dstokesag

    Perpendicularity of a flange surface to a bore ID datum

    I have a very large flange part that has a 0.05mm perpendicularity callout to Datum -A- which is an ID bore diameter that is also very large and only about 21mm in depth. We setup a CMM program to inspect the part and depending on how many inspection points we put on this surface we can get...
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