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Interesting find - What is it??

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  • Interesting find - What is it??

    I picked this up from a closed aerospace machine shop.
    It's about 30" tall, with a dovetail and rack on the Z axis.
    It has two movable heads, each with what looks like a laser. These point at each other through the hole in the small table - which also moves.
    Brand is Cleveland, and it also is marked "Micro-Ac"

    I intend to repurpose it something different (Suggestions?), but before I reach the point of no return I'd like to know what it was used for. Anyone recognize it?

    Last edited by Rex; 03-27-2016, 11:32 AM.

  • #2
    looked like a hardness test, but then I saw laser, optic bench for lenses?
    Mark
    Last edited by boslab; 03-27-2016, 11:37 AM.

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    • #3
      It's similar to a hardness tester, but the working tips are glass.
      A hardness tester usually has a hard point and an anvil. This has neither

      This shop made parts for Bell Helicopter. They had both manual and CNC machines.

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      • #4
        See your outher post.

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        • #5
          It's an 'opposed head comparator' originally designed for checking gauge blocks.

          Using two comparator heads (instead of a single one over a fixed surface) eliminates the need to wring the gauge block to the reference surface and reduces the potential for error.

          Cheers

          .
          Last edited by Barrington; 03-27-2016, 03:32 PM.

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          • #6
            Barrington, that makes sense, thanks.
            The only question now is does it use lasers or just small camera lenses with the video fed to a PC?

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            • #7
              No, these aren't comparators in the sense of 'optical comparators', they're an electronic version of a very high resolution 'dial gauge'.

              A spring loaded plunger moves axially and it's position is determined electronically (usually electromagnetically via an arrangement of coils - Google "LVDT").

              With the opposed head type two transducer inputs are simply combined to show changes in the distance between the two tips.

              Cheers

              .
              edit: Link to 'Handbook of Dimensional Measurement':- LINK
              Last edited by Barrington; 03-28-2016, 07:08 AM. Reason: Added link

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              • #8
                I have not checked to see if the tips are spring-loaded, but they are glass.

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                • #9
                  I would use it to support a camera for taking pictures of flat things. books, art, things that don't scan well.

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                  • #10
                    Actually, I have an ongoing project to do just that. I have already modified a Shadograph to mount a DSLR over a lightbox to photograph slides. Once finished I found I did not have a lens that would focus under 1 ft. This column gives me twice that focal distance, so it might work. GMTA

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