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  1. #1
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    Default "A Moment At The Seaside" WIP

    A group of visitors to a beach, spot something in the water.....
    The group stops. The next movements need a few seconds during which the mechanism which makes the group move will pause. The input speed required slow movement, instead of making a set of reduction gears, a worm gear was created using a store bought large spring which meshed with a ply gear made to drive the crankshaft. Video attached.

    Worm Gear.mp4

    Thank you for looking,
    Gus

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  3. #2
    Boringgeoff is offline Try not to be late, but never be early.
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    I love the way that runs. I think you need to turn the leading end of the spring out a little or grind a chamfer to avoid it cutting the gear wheel once it's under load.
    Cheers,
    Geoff.

  4. #3
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    Thank Geoff for you input, much appreciated ! Due to the small diameter output gear, and the height of the teeth, only two of the spring windings, the middle two, are in direct contact with the teeth at any one time. The spring, even though it is quite stiff had to be installed onto a timber dowel so I could install it onto a shaft, hence the teeth had to clear the dowel. I remain concerned that long term, the small contact area may wear the gear out. I have yet to see how it behaves under load, I am hoping that worm "gears" have great torque.
    Regards,
    Gus

  5. #4
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    Default WIP The slide mechanism

    The beach visitors arrive on a platform which slides on a linear mechanism sourced from a discarded printer during a council clean up. These cleanups are a valuable resource for all sorts of components, this being one, springs, unusual fasteners, linkages, plastic gears etc. Also disassembling them gives many insights into how manufacturers solve mechanical challenges. In this case, the length of the rod turned out to be the exact movement length needed for this automaton.
    Thanks for looking,
    Regards,
    Gus

    IMG_1618.mp4

  6. #5
    crowie's Avatar
    crowie is offline Life's Good, Enjoy each new day & try to encourage
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    Another project to watch and enjoy thank you Gus...

    You're lucky to have "council cleanups"; up here it's book the pickup, put it out the night before and gone by lunchtime the next day,
    so everyone misses out with more to land fill rather than recycling or repurposing!

    Cheers, Peter

  7. #6
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    Hi Peter ! Good to hear from you, thanks for your continuing interest in these fascinating ( for me ) things ! Pity about council cleanups up there, what a waste ! Hope all is well with you,
    Regards,
    Gus

  8. #7
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    Top Work Gus

    Ingenious worm shaft

    I love looking at your work and how you can get things to work

    Regards

    Keith

  9. #8
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    Keith, Thanks very much for your comment, always appreciate your kind comments, especially coming from a master inventor/innovator !

    Regards,
    Gus

  10. #9
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    Default WIP - Linear movement

    The two pin wheels form the engine of the linear movement for the carriage above. The first video shows them without the arm, the second with, and how the pause is achieved. For other actions to take place, and to hold the carriage in place, this 25 second pause was crucial to the actions above. The arm connects to the carriage via stainless steel fishing line routed to opposing sides, around brass pulleys. Return of the carriage is by rubber strand, once the tension is released by the arm.
    Thanks for looking,
    Gus

    IMG_1619.mp4

    IMG_1716.mp4

  11. #10
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    Top mechanism there Gus.

    Very skilled work

    Regards

    Keith

  12. #11
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    Default WIP - Slide mechanics

    There are four characters walking along the beach. The mechanics attached to the slide are the means of control for them. Normally, the platform which serves as the "stage" for subsequent storytelling isn't moving, which makes for relatively simple means of control via cable, lever, cam etc. In this case, whatever movements are achieved by some means of control cannot be directly attached to the slide. The first movement after arrival is a turn by the characters toward what they spotted in the distance. The photo attached shows four brass tubes, to which the characters will be attached, and are then rotated. The brass strips to which the tubes are connected, are pushed by the mechanism seen in the video, controlled by a cam below. Further controls pass through the tubes, from the body of the characters, and emerging through the bottom of the slide, connecting to another mechanism under, and a cam, controlling movement. Electrical cable also will be routed through these.

    Thanks for looking,
    Gus

    Slide upper. A jpg.jpgSlide upper B.jpgTurn.mp4

  13. #12
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    Default WIP - Carriage Mechanisms

    Once the carriage arrives, two mechanisms serve to create the movements of the four characters. The first video is the view from the top and how the characters turn. The other is of the interior of the mechanism case, looking up under the top panel. As the carriage arrives, the copper linkage connected to its cam, captures the brass element and pulls the telescoping section. This is connected via cables to each character through the tubes and up into the body. The return by rubber is not a success, it places too much load on the slide mechanism, the reject bin got it, back to the drawing board......tomorrow's task.

    Thanks for looking,
    Gus

    Carriage mechanism.mp4


    Interior of Slide mechanisms.mp4

  14. #13
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    Excellent stuff Gus

    Regards

    Keith

  15. #14
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    WIP now in recess due to travels, resume August. My thanks to all who followed the process so far !

    Regards,
    Gus

  16. #15
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    Quote Originally Posted by xpro View Post
    WIP now in recess due to travels, resume August. My thanks to all who followed the process so far !

    Regards,
    Gus
    Have a safe trip

    Regards

    Keith

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