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Thread: Miniature punch press - video

  1. #1
    Jon
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    bimmer1980 (Jan 18, 2018), gunsgt1863 (Jan 18, 2018), Moby Duck (May 26, 2018), NortonDommi (Jan 18, 2018), Paul Jones (Jan 21, 2018), PJs (Jan 18, 2018), rossbotics (Jan 22, 2018), Saxon Violence (Jan 18, 2018), Seedtick (Jan 17, 2018), sossol (May 27, 2018), Syko Triker (Jan 18, 2018), Toolmaker51 (Jan 17, 2018)

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    Every bit as impressive to the other miniatures you've featured, and Marv's own projects.
    I'd be tempted to edit the audio portion with sounds of a 400 ton press, lol, but that's just me...
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    Paul Jones (Jan 21, 2018)

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    Hi Jon
    Great video really nice looking item. Does anyone know how the clutch works as it engages very easy? Thank you to anyone who can help.
    The Home Engineer

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    Supporting Member Toolmaker51's Avatar
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    A "real" press might run straight toothed dogs, angled sprags, plate & disc...depending on tonnage and press type. Maybe needle clutch if there is a way to actuate at TDC of the crankshaft.
    Since [the model] it's hitting light foil, at relatively low speed, a number of possibilities exist. Biggest restraint; scale of parts to attain running fit with actuation.
    https://en.wikipedia.org/wiki/Clutch
    I hate to call it a model, it is a true punch press, just tiny. Such things always remind me of aeronautic engineer in "Flight of the Phoenix", defending free flight [small scale] planes versus models and toys.

    After a plane crash in the Sahara, one of the survivors says he's an airplane designer and they can make a flyable plane from the wreckage.
    The Flight of the Phoenix (1965) - IMDb
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    ...we'll learn more by wandering than searching...

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    thehomeengineer (Jan 25, 2018)

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    Hi Toolmaker51
    Thank you for the reply. It was more on the linkage to operate the clutch. From the downward force on the handle this operates the clutch to move at 90 degrees to the action is it maybe a bell crank lever?
    Very nicely made item
    The Home Engineer

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    Toolmaker51 (Jan 25, 2018)

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    Yes, a bellcrank is suitable. Some bigger presses use a cam, others an automotive style yoke ala manual shift. Each achieves axial movement for engagement.
    Foot or hand trip levers aren't so prevalent anymore, most are electric or pneumatic switch retro-fits.



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