Thinking this may be a glich

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  • Thinking this may be a glich

    Trying to report a runout of a surface to a surface and a face using xact measure seems to give me the right deviation but if I turn or graphics it seems like the error/vector is flipped. If I report it as a parallelism which is what it seems to be reporting at anyways it matches what I see on the machine using indicators. looks like axial runout is just like the hole concentricity being report as position. any more insight would be helpful.

  • #2
    Originally posted by Spencer_23 View Post
    Trying to report a runout of a surface to a surface and a face
    Well there's your problem.
    Runout requires a primary datum that's a centerline/centerpoint, a surface cannot be datum for runout.

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    • #3
      Originally posted by Josh Carpenter View Post
      Well there's your problem.
      Runout requires a primary datum that's a centerline/centerpoint, a surface cannot be datum for runout.
      Ooops I miss spoke,
      So my datum -A- is a surface
      datum -B- is a bore
      and its runout of a back surface which is parallel to -A-
      runout to -A-B-

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      • #4
        Originally posted by Spencer_23 View Post
        Ooops I miss spoke,
        So my datum -A- is a surface
        datum -B- is a bore
        and its runout of a back surface which is parallel to -A-
        runout to -A-B-
        The callout should say runout to B A then. Primary must be centerline/centerpoint.

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        • #5
          Originally posted by Josh Carpenter View Post
          The callout should say runout to B A then. Primary must be centerline/centerpoint.
          is that a dmis thing?

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          • #6
            Originally posted by Spencer_23 View Post
            is that a dmis thing?
            It's a GD&T "thing"
            sigpic

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            • #7
              runout.png
              based off ASME Y14.5

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              • #8
                Originally posted by Spencer_23 View Post
                [ATTACH=CONFIG]10680[/ATTACH]
                based off ASME Y14.5
                That's a good find, thank you. Now I see what your print wants. It's rare and really tricky to check mechanically unless you build a special whirligig that holds the part with the plane as primary and centerline as secondary. Every whirligig I've used has a chuck that holds the centerline datum as primary.

                Originally posted by Spencer_23 View Post
                Trying to report a runout of a surface to a surface and a face using xact measure seems to give me the right deviation but if I turn or graphics it seems like the error/vector is flipped. If I report it as a parallelism which is what it seems to be reporting at anyways it matches what I see on the machine using indicators. looks like axial runout is just like the hole concentricity being report as position. any more insight would be helpful.
                So I went back and re-read your 1st post more carefully.
                It seems your #1 problem is a graphics arrow and your #2 problem is that unless you are spinning the part clamped to the A plane but rotating around B bore center you're not going to see the same deviation. Just running the indicator over a motionless part is parallelism - although the results should not be too much different if you're sweeping over the whole surface and the part is not mangled. How much different are your results?

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                • #9
                  Yeah definitely something you do not see everyday, I have not had the time to see if putting the bore -B-(circle) so no axis as primary too see if it would fix my graphics issues or not hope to try it out later today. I know its not "right" but I'm thinking it will give me the same deviation and may fix my graphics which would be nice! thanks for the help.

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