Measuring a Torus

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  • Measuring a Torus

    How do you measure a torus in PC-DMIS 4.1? I need to get a radius measurement on a "U" shaped 5" diameter tube.

  • #2
    I didn't even know what a torus was until I looked here:
    http://mathworld.wolfram.com/Torus.html

    This may give you an idea???
    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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    • #3
      How is it dimensioned & toleranced? Is it just a simple profile tolerance or are radii and other features dimensioned?

      Can you upload a sketch or something?
      sigpic
      Xcel 15-20-10 - PFXcel 7-6-5 - Merlin 11-11-7 - Romer Absolute 7525SI
      PCDMIS 2012
      Windows Office XP

      Comment


      • #4
        It's a "U" shaped tube with a radius dimension to the center line of the tube. I'll see if I can get a sketch uploaded.
        Last edited by pjleitner; 02-12-2007, 05:45 PM.

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        • #5
          Measure it as a series of arcs and then construct a circle thru those centerlines
          Links to my utilities for PCDMIS

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          • #6
            The arcs (circles) don't follow the contour of the "U" of the bend. I keep getting prompted to change the work plane to either X plus or Y plus. This puts the arcs on the X axis or Y axis instead of on the contour of the bend.

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            • #7
              Can you rotate the Coordinate system to match the given "Slice" that you are checking?
              Links to my utilities for PCDMIS

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              • #8
                Thats looks tough, but cant you just measure the U bend as a half circle? Your only concerned with the Radius of the bend right?

                Otherwise I think your stuck having to level to each slice like cmmguy mentioned.
                Mr. Comment
                SCIROCCO-NT 13-20-10
                B3C-LC Controller (Leitz Protocol), SP600M, TP200
                PCDMIS CAD++ v4.3 MR1(Build: 12/11/08)
                sigpic

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                • #9
                  I have a '96 Taurus if that helps.....

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                  • #10
                    This is turning out to be much harder than expected. The radius dimension is called out from the center axis of the tube so it looks like I am going to have to do the slice method. So far I have been unsuccessful with doing this.

                    Also, this part is too big to get on our largest CMM so I am left to use a portable (Romer) CMM. This could be why I am having so many problems with this measurement.

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                    • #11
                      measure a few circles from x minus after you pass 45 degrees go to y minus and so on. when your finished, construct center points (of each circle you just measured) and then from z plus use the center points to construct the over all radius.

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                      • #12
                        Thanks. I think that method worked.

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