taking a thickness measurement on a spherical surface

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  • taking a thickness measurement on a spherical surface

    We have a part with a spherical surface in it that requires a thickness measurement. How can this be done? Construct a line of some hrough the two surfaces?

    Any help would be appreciated

  • #2
    Point or ball mics?

    Just kidding.

    Measure the outside sphere. Measure the inside sphere.
    Create an assignment.
    Thickness = (outer sphere diam. - inside sphere diam.) /2
    or
    Thickness = (outer sphere rad. - inside sphere rad.)
    When in doubt, post code. A second set of eyes might see something you missed.
    sigpic

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    • #3
      Hopefully you have enough surface to get a good Sphere. If so, then one really easy way is to translate to the sphere and sample radial points along the same vector on both sides and report 3D Distance.
      HTH,
      Bill Jarrells
      A lie can travel half way around the world while the truth is putting on its shoes. - Mark Twain

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      • #4
        Originally posted by Wingman View Post
        Hopefully you have enough surface to get a good Sphere. If so, then one really easy way is to translate to the sphere and sample radial points along the same vector on both sides and report 3D Distance.
        HTH,
        Never thought of that Bill. Cool idea.
        When in doubt, post code. A second set of eyes might see something you missed.
        sigpic

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        • #5
          Originally posted by Wingman View Post
          Hopefully you have enough surface to get a good Sphere. If so, then one really easy way is to translate to the sphere and sample radial points along the same vector on both sides and report 3D Distance.
          HTH,
          AND your CMM positions well...
          Links to my utilities for PCDMIS

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          • #6
            Originally posted by Joe Arnold View Post
            We have a part with a spherical surface in it that requires a thickness measurement. How can this be done? Construct a line of some hrough the two surfaces?

            Any help would be appreciated
            Is it spherical on both sides of the wall?
            Links to my utilities for PCDMIS

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            • #7
              Originally posted by cmmguy View Post
              Is it spherical on both sides of the wall?
              I made that ASSumption.
              When in doubt, post code. A second set of eyes might see something you missed.
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              • #8
                Me too, that is why I thought it should be asked now that we solved his problem
                Links to my utilities for PCDMIS

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                • #9
                  Originally posted by John Kingston View Post
                  I made that ASSumption.
                  Well, seems a pretty safe assumption to me. If it wasn't then it would be a pretty dumb callout to ask for thinkness UNLESS you had a specified Gage Point. Wouldn't it?
                  Bill Jarrells
                  A lie can travel half way around the world while the truth is putting on its shoes. - Mark Twain

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