Diameter graphing

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  • Diameter graphing

    When issues come up, they come up.

    Back to the issue of trying to determine form. The diameter we are measuring has one value for the basic size, another for the first oversize condition and another for the second oversize condition.

    My cohort wrote a simple program to measure the appropriate diameter and graph the results. He is using an input statement to ask the operator to input whether the part is at a basic diameter, first oversize or second oversize.

    To test the program he ran it three times inputting the value asked for in the statement.

    Because he only has the one part, one would expect the graph to look the same. The actual measured diameter is the same and so is the roundness.

    The graphs show something completely different. The graph of the profile of the hit points shifts as much as 90 degrees! Any ideas why?

    If I had to guess, I would say the machine is computing different hits for the different diameters and graphing accordingly.

    The basic diameter is 1.5608
    The first oversize is 1.6863
    The second oversize is 1.6963

    We just ran the program 3 times with the same basic size and the graphs are still rotated

    Any ideas?

    Hilton Roberts

    "Carpe Cerveza"

  • #2
    What are you using to Graph? Or are you talking about graphical analysis?
    I used to be high on life but I built up a tolerance.

    Brown & Sharpe Global Advantage
    PCDMIS CAD++ v2011mr2



    • #3
      I think we found the problem. It was a wrong button push that wrote the graphics to the report rather than creating a new graphic every time the program ran. Now the data looks like it should. Learn something new everyday. Now that we have saved the company for another day, I am ready for beer thirty

      Hilton Roberts

      "Carpe Cerveza"


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