Cylindricity Question

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  • Cylindricity Question

    I am running 3.7 MR2 and am wondering what would be the best way to find the cylindricity of a feature since it is not available in this version. Is there another tool that you use to calculate cylindricity? Thanks in advance. The feature I need to check is approximately 2 inches long. Would concentricity work? The problem is the reference length with concentricity. Thanks

    Mike

  • #2
    Roundness should give you what you are looking for.
    sigpic
    Originally posted by AndersI
    I've got one from September 2006 (bug ticket) which has finally been fixed in 2013.

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    • #3
      Cylindricity is not only roundness but also straightness.

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      • #4
        I was always told that if you asked for roundness, PC-DMIS reports circularity when it is a circle and cylindricity when it is a cylinder. So look at RN for the cylinder, and you ought to be all set.



        Jan.
        ***************************
        PC-DMIS/NC 2010MR3; 15 December 2010; running on 18 machine tools.
        Romer Infinite; PC-DMIS 2010 MR3; 15 December 2010.

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        • #5
          Originally posted by Jan d.
          I was always told that if you asked for roundness, PC-DMIS reports circularity when it is a circle and cylindricity when it is a cylinder. So look at RN for the cylinder, and you ought to be all set.



          Jan.
          I am pretty certain that statement is true. I haven't actually cerfied that statement, but I was told the same thing in class about 3 years ago...
          sigpic
          Xcel 15-20-10 - PFXcel 7-6-5 - Merlin 11-11-7 - Romer Absolute 7525SI
          PCDMIS 2012
          Windows Office XP

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          • #6
            Originally posted by rangerboat72
            I am pretty certain that statement is true. I haven't actually cerfied that statement, but I was told the same thing in class about 3 years ago...
            Yup, I was told the same thing in class...
            Recently jumped from 3.5 Mr 2 CAD
            to 2012 CAD++

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            • #7
              You guys are correct. Direct from the help file:

              The Dimension | Roundness menu option determines the roundness of a circle, cylindricity of a cylinder, sphericity of a sphere and the conicity of a cone. This dimension type is considered one sided, meaning a single positive value tolerance is applied.
              When in doubt, post code. A second set of eyes might see something you missed.
              sigpic

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              • #8
                I looked up cylindricity with a now cranially numb engineer, ......

                Wanna here it? Here it goes....

                Cylindricity includes concentricity, straightness and surface imperfection.

                The tool to use that came to mind was an indicator.
                http://baggy3.info/signani3.gif
                Excercise your mind,..... muscle works better than fat!!

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