Changing Lenses

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  • Changing Lenses

    Does anyone have an instructional document on how to change lenses? I have a Tesio300 that came with a 2X lens installed and a 0.5X lens as an extra and I want to use the 0.5X lens but can't. I thought I had it in correctly by removing the ring light and screwing it in underneath but when I tried to calibrate it to the ROI solid block master I could not get the .562 square to fit in the graphics display window. Any help would be appreciated.
    James Temmen

    There is no job so simple that it can't be done wrong.

  • #2
    Hi James,

    You will need to ensure you've defined a seperate Probe with this mag size, so that the calibration software knows which lens size it is (and thus which of the rectangles to instruct you to measure that will fit in the Field Of View).

    For example, you should already have a probe built up for your 2x lens using the following components

    TESA_VISIO300_ZOOM\TESA_VISIO300_ZOOM_2x

    You will need to create a new probe for you 0.5x lens by going into Probe Utilities and building a probe with the following components :-

    TESA_VISIO300_ZOOM\TESA_VISIO300_ZOOM_0.5x

    Select this new probe before calibrating.

    Incidentally, it's strange that you have an ROI slide on a TESA machine. Normally, the TESA machines should be shipped with the Hexagon Metrology glass calibration slide. This will become more important in future versions (V4.1, V4.2) as additional calibrations are being added that require this generic slide.

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    • #3
      I did create the new probe file, I guess my first question is how do I install the 0.5X lens?, do I need to remove the other one first or just screw the new one onto the end of what is there?
      James Temmen

      There is no job so simple that it can't be done wrong.

      Comment


      • #4
        Originally posted by nkayWAI
        Hi James,

        You will need to ensure you've defined a seperate Probe with this mag size, so that the calibration software knows which lens size it is (and thus which of the rectangles to instruct you to measure that will fit in the Field Of View).

        For example, you should already have a probe built up for your 2x lens using the following components

        TESA_VISIO300_ZOOM\TESA_VISIO300_ZOOM_2x

        You will need to create a new probe for you 0.5x lens by going into Probe Utilities and building a probe with the following components :-

        TESA_VISIO300_ZOOM\TESA_VISIO300_ZOOM_0.5x

        Select this new probe before calibrating.

        Incidentally, it's strange that you have an ROI slide on a TESA machine. Normally, the TESA machines should be shipped with the Hexagon Metrology glass calibration slide. This will become more important in future versions (V4.1, V4.2) as additional calibrations are being added that require this generic slide.
        Just so you know, I have been using PC-DMIS on a cmm for about ten years so I have a pretty good understanding of its funtionality, whit that said however I am only about 60% confident on what I am doing with this new vision system, i.e. how to correctly change the physical lens. Hope this helps avoid some wasted time by being able to skip some rookie mistake type errors you might be looking at. Thank you.
        James Temmen

        There is no job so simple that it can't be done wrong.

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        • #5
          There is no extra lens for X1, so you can screw the lens without any cover removing, just with your little fingers.
          But I am surprise because using a ROI slide with a dongle for TESA VISIO is not allowd...
          Jpc-Dmis

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          • #6
            Originally posted by JPC-dmis
            There is no extra lens for X1, so you can screw the lens without any cover removing, just with your little fingers.
            But I am surprise because using a ROI slide with a dongle for TESA VISIO is not allowd...
            It's an option in the calibration routine and it's the only artifact I have to cal. to. Back to the install, I just screw the0.5x lens onto the bottom of whats there and create the new probe file and thats it...i'll give it a try.
            James Temmen

            There is no job so simple that it can't be done wrong.

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            • #7
              If you have the lens 2X, you must before remove it !!!
              good luck, I am leaving for 3 days ... (big WE) fine...
              Jpc-Dmis

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              • #8
                Hi James,

                It sounds like you changed the lens correctly. If you've got tiny fingers, it is possible to swap without removing the ring light, but some people find it easier to remove the light first as you did.

                As long as you've selected the TESA_VISIO300_ZOOM_0.5X tip then you should be ok.

                That's all you do... screw in new lens, create new probe file of that objective size, and run the optical calibration.

                The crux of the matter is that by selecting the ROI slide, it means you are running the calibration routine designed for the Ram Optical range of machines. The TESA machines are calibrated with a Hexagon Metrology slide, which is a totally different calibration routine designed to be machine independant. I suspect that the depth of field differences on these two machines is causing this issue, and suggest getting in touch with your supplier and getting the correct calibration artifact for the VISIO machine.

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                • #9
                  James, your portlock is incorrectly programmed if you are seeing the ROI slide options. They should only appear if your machine interface is ROI, or, more likely, the service engineer option is on. On your configuration, you should only see the Hexagon Metrology Slide option.

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                  • #10
                    Thank you very much, I will try to get a hold of the correct artifact.
                    James Temmen

                    There is no job so simple that it can't be done wrong.

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