How can this be?

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  • How can this be?

    How can this be? Measuring a cylinder and dimensioning for a radius 1.18 +/-.030
    result is 1.180 zero dev. out of tolerance .030. I am confused. See report. Part is not on the table yet just started to program with igs model , using 4.1.
    Last edited by BANDY; 05-01-2008, 07:59 PM.
    Pc-Dmis 4.2, Zeiss Eclipse
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  • #2
    Can you post the code? Might be your tolerancing. I have inadvertantly typed in a minus for the mius tol. Gives funky readings then.
    When in doubt, post code. A second set of eyes might see something you missed.
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    • #3
      I have pasted the code from the edit window just under the report. As you see it shows +.030 and -.030 . If I change the the "- tol " value to .060 for example then the outtol will change to .060 too. Something I must have change in the preferences...
      Pc-Dmis 4.2, Zeiss Eclipse
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      • #4
        Yep, that would be my bet. Enter the ABSOLUTE value of the negative toelrance, Pcdmis assumes it is a negative value. So, if you enter in a negative value, you get a doubel negative, which IS a positive value.
        This is to allow you to bracket your tolerance band all on one side of nominal. For example, a hole with a nominal size of 10mm, but the size tolerance is +0.05/+0.10, so you would enter in a NEGATIVE 0.05 for the negative tolerance amount, thus giving the lower limit of +0.05.
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        Originally posted by AndersI
        I've got one from September 2006 (bug ticket) which has finally been fixed in 2013.

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        • #5
          Yeah I got it now. In the feature location dialog box I had to enter -.030 where its asking for the minus tolerance. don't make sense since its asking for a MINUS tolerance. why would I need to type the minus symbol , but whatever. its works now. Thank you for the help.
          Pc-Dmis 4.2, Zeiss Eclipse
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          • #6
            Check the F5 setup, under the DIMENSIONS tab, see if MINUS TOLS SHOW NEGATIVE is marked.
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            Originally posted by AndersI
            I've got one from September 2006 (bug ticket) which has finally been fixed in 2013.

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            • #7
              Yes, that what I have changed...DUH!
              Pc-Dmis 4.2, Zeiss Eclipse
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              • #8
                Would be interesting to see when editing the tolerances in the command mode edit window instead of the F9 way if it changes also.
                I used to be high on life but I built up a tolerance.

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                PCDMIS CAD++ v2011mr2
                PH10MQ/SP600M


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