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Thread: Wobblers

  1. #1
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    Default Wobblers

    Wobbler 2.0 is a successor to Wobbler 1.0, which was a study sketch in Spruce, about 4 1/2" (115mm) in diameter and unfinished.

    They're both loosely derived from David Springett's "Ribbon Streptohedron" in "Woodturning Full Circle," but with a circular cross section of each torus.

    I call them "wobblers," because when rolled on a table top or the floor, they traverse an S-shaped path defined by cones tangent to a large and a small arc. There are four such cones available, but only two operate in a single rolling.

    Wobbler 2.0 is 11" (280mm) in diameter, limited by my lathe's 12-inch swing, with allowance for cutting the outside and support for cutting the inside. The torus body has a diameter of 1 5/8" (41mm). The small rings are about 6 1/4" (160mm) in diameter.

    There are 132 segments altogether, 66 each in Spruce and Mahogany. The large ring has 60 segments of 6 degrees; the two small rings have 36 segments of 10 degrees. I chose those values to make the outside width of the segments almost equal, for ambiguity in the exact location of the transition between large and small. The junctions lie at the corners of a hexagon.

    The finish is clear semi-gloss polyurethane.

    Cheers,
    Joe
    Of course truth is stranger than fiction.
    Fiction has to make sense. - Mark Twain

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  3. #2
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    Joe I have the book one day maybe I'll get to attempt such as this

    Well done

  4. #3
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    Joe,

    WOW!

    Not in this lifetime or the next will I attempt something like that.
    So much timber, so little time.

    Paul

  5. #4
    cookie48 is offline Old Fart (my step daughters named me)
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    Default

    OK I'll bite. Wobble wobble wobble. That is clever craftsmanship.

  6. #5
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    Thank you all. I think this is one of the weirdest things I've ever made - so far.

    Cheers,
    Joe
    Of course truth is stranger than fiction.
    Fiction has to make sense. - Mark Twain

  7. #6
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    Great
    regards
    Nick
    veni, vidi,
    tornavi
    Without wood it's just ...

  8. #7
    Join Date
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    Default

    As almost everybody knows, pictures vanished from threads of this era.

    However he found this thread, member SawTooth1953 requested pictures as shown in the tag line of post #1. The Forum sent me an email about the request.

    I don't know what pictures were originally included, so I've reconstructed some from my files.

    The second one is a stereo view. To see it in stereo, aim your eyesight at twice the distance to the screen, i.e."uncross" your eyes.

    The first one illustrates the hexagon pattern of the arc junctions.

    I hope this helps.

    Cheers, Joe
    Attached Images Attached Images
    Of course truth is stranger than fiction.
    Fiction has to make sense. - Mark Twain

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