Prajna
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@Guineafowl, yes, the initial setup could be simplified to test the principles but concerning the design posted above, what can be simplified?
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Prajna
Fixing things for the love of it
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So, I have expended a little mental exertion on the problem of stopping the device.
The reason it runs (if it runs at all) is because the metal tabs are aligned with the converging parts of the cam tracks. It would be simple enough to mount the tabs on a ring that can be rotated independently but relative to the rotor so that the tabs align with the crossover (where the tracks switch from converging to diverging) rather than with the convergence. That will stop the device since it will block the repulsion where the tracks diverge. Rotating the control ring further will align the tabs with the diverging tracks, so the machine will run in reverse.
It could be arranged simply by using an eccentric cam that turns in a slot, biasing it in one direction or the other. A clamp could be arranged at the rotor axle so that closing the clamp rings rotates the cam so that the control ring miss-aligns with the converging sections of the cam tracks.
It will complicate the design a little, of course, for which I have already been criticised, however complication is necessary to some extent, so long as there is not more complication than is necessary to implement a feature then little can be done about that.
Guineafowl
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You know perfectly well what I mean, you naughty boy
Prajna
Fixing things for the love of it
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I've updated the web page for the device detailing the control mechanism that allows the device to be started in forwards or reverse rotation and to be stopped when running. (Just in case anyone is interested.) I'm rather pleased with the way it has turned out and has fitted into the device and I think it is worthy of a patent by itself (if I was into patenting.)
The control system toggles the device off whether it is rotating forwards or backwards, is simple and has few moving parts.
Info at https://tomboy-pink.co.uk/sfmm/
Apologies to @Guineafowl, who I'm sure is still anxiously waiting for documented tests of the principle.
The control system toggles the device off whether it is rotating forwards or backwards, is simple and has few moving parts.
Info at https://tomboy-pink.co.uk/sfmm/
Apologies to @Guineafowl, who I'm sure is still anxiously waiting for documented tests of the principle.
Onoff
In the land of the unfinished project I am King!
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Don't worry, the Chinese will do it for you.
Screwdriver
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Getting it to stop is the last thing I'd be worried about.
Guineafowl
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That would be an ecumenical matter…
Not to seem Impatient, but can you build a simple working model to prove the concept???!
Prajna
Fixing things for the love of it
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You do seem a tad impatient. I'm working on it. ETA for my 3D printer is tomorrow evening.
Onoff
In the land of the unfinished project I am King!
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To be fair at this rate I'll finish a project before you!
hotponyshoes
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I think Prajan has more chance of getting this working first...
My Old Landy
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Can you link your GitHub, I enjoy building other people's projects. I am impartial on it's potential so will give it a good chance.
Prajna
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GitHub - prajna-pranab/SFMM-Mk1: Switched Flux Magnetic Motor (SFMM)
Switched Flux Magnetic Motor (SFMM) . Contribute to prajna-pranab/SFMM-Mk1 development by creating an account on GitHub.
github.com
Onoff
In the land of the unfinished project I am King!
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My very uneducated understanding of "perpetual motion machines" is that without fail, they fail on the basis of you don't get something for nothing, a big dose of friction, air resistance etc. Thus they may work at or s time until they run out of energy.
Again a very uneducated assumption is they need extra energy in the form of a "little push". Thinking the Newton's Cradle.
Could the device in this thread benefit from extra, "free" energy from say wind or solar?
Again a very uneducated assumption is they need extra energy in the form of a "little push". Thinking the Newton's Cradle.
Could the device in this thread benefit from extra, "free" energy from say wind or solar?
Nomad
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Watching this with interest as any "perpetual motion" device fascinates me and I've had / seen a few over the years.
As a kid I had a "floating" (by magnets) spinning wheel similar to https://www.amazon.com/Flagest-Levi...l-Bookshelf/dp/B0B1LVQWC8/ref=sr_1_11?sr=8-11
I have a Cooks Radiometer on the window next to me, https://www.amazon.com/s?k=cookes+radiometer
A friend had a MOVA spinning globe and that's now on my wish list
https://eu.movaglobes.com/
Articles below show how things have progressed ... nice !
Winner of the perpetual motion awards https://news.mit.edu/1999/perpetual-0519
Article & video of magnetic perpetual motion device - similar principle to @Prajna - magnets pull together - then reset - repeat https://www.greenoptimistic.com/real-working-magnetic-motor/
As a kid I had a "floating" (by magnets) spinning wheel similar to https://www.amazon.com/Flagest-Levi...l-Bookshelf/dp/B0B1LVQWC8/ref=sr_1_11?sr=8-11
I have a Cooks Radiometer on the window next to me, https://www.amazon.com/s?k=cookes+radiometer
A friend had a MOVA spinning globe and that's now on my wish list
https://eu.movaglobes.com/Articles below show how things have progressed ... nice !
Winner of the perpetual motion awards https://news.mit.edu/1999/perpetual-0519
Article & video of magnetic perpetual motion device - similar principle to @Prajna - magnets pull together - then reset - repeat https://www.greenoptimistic.com/real-working-magnetic-motor/
hotponyshoes
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It's the friction & resistance & etc. that's the killer.
Take this for example,
A fairly simple device consisting of an endless chain of balls/rollers, a 'lift' side and a coiled/helix ramp.
All the balls/rollers weigh the same.
12 balls being lifted, 2 on the flat, 44 going down.
The maths for this is fairly easy.
Say the balls are 10g each.
The total being lifted = 120g
If the down ramp is 45deg then the force exerted by the balls will be half (5g each)
So 44 balls will have 220g of downwards force.
More than enough to lift the 120g and cover the 2 balls on a flat surface.
Note, I'm not suggesting this is a free energy machine (just a pepertual motion one)
It will require energy input (from a push) to get it going.
It will require constant energy input from the earth's gravity to keep it moving.
It does not break any scientific laws.
Yet, mine still won't work?
Maybe I need to put it in a vacuum chamber to remove air resistant?
Maybe I need to make the balls from something denser? Carbide?
Highly polish them so the weight increases relative to the contact patch (effectively reducing the rolling resistance)
Or maybe make the balls into rollers with a concave center so they have very little contact?
Maybe too much friction in the links? Could I use magnets to link them somehow?
Prajna
Fixing things for the love of it
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Thanks @Nomad, I'll take a look when I get a chance. Meanwhile, here's another link for you to add to your collection:Watching this with interest as any "perpetual motion" device fascinates me and I've had / seen a few over the years.
As a kid I had a "floating" (by magnets) spinning wheel similar to https://www.amazon.com/Flagest-Levi...l-Bookshelf/dp/B0B1LVQWC8/ref=sr_1_11?sr=8-11
I have a Cooks Radiometer on the window next to me, https://www.amazon.com/s?k=cookes+radiometer
A friend had a MOVA spinning globe and that's now on my wish list
Articles below show how things have progressed ... nice !
Winner of the perpetual motion awards https://news.mit.edu/1999/perpetual-0519
Article & video of magnetic perpetual motion device - similar principle to @Prajna - magnets pull together - then reset - repeat https://www.greenoptimistic.com/real-working-magnetic-motor/
