Howard Johnson Replication Tube Claim

[IotaYodi]

 Found these statements on Aluminum. Eddy currents must be helping the rotation.

Aluminum isn't normally magnetic, but as you carry a large aluminum tray toward the magnet, you find that the magnet repels the aluminum.  Explain.
Once again, Lenz's law.  The magnet induces a magnetic field in the moving aluminum tray to oppose its own, effectively pushing it away.

Most atoms, such as those in aluminum, have half their electrons spinning in one direction and half in the opposite direction. That means the magnetic fields of the individual electrons cancel each other out

[joe_1001101]

Found these statements on Aluminum. Eddy currents must be helping the rotation.

Aluminum isn't normally magnetic, but as you carry a large aluminum tray toward the magnet, you find that the magnet repels the aluminum.  Explain.
Once again, Lenz's law.  The magnet induces a magnetic field in the moving aluminum tray to oppose its own, effectively pushing it away.

Most atoms, such as those in aluminum, have half their electrons spinning in one direction and half in the opposite direction. That means the magnetic fields of the individual electrons cancel each other out

Is it going to be possible for me to cut this piece of aluminum, or should I just go get a pre-cut rotor.  The G5 side panel is 1/8" thick.

Thanks,
Joe

[BEP]

And if you embed a magnet in aluminum or attach it to the surface of aluminum with enough thickness to mean something... That aluminum does nothing in reaction to the attached magnet. They aren't moving in relation to one another - or are they? Certainly not when the disk is not turning 

When that Al and associated magnet pass under a foreign magnetic field it reacts as always. Good Ol' Lenz again. Do it right - will the reaction field be strong enough to offset effects of one pole on a rotor magnet?

If Al is only good for Eddy currents then why do magnet manufacturers sell magnets encased in Al with only on face exposed? Rare, yes but they are out there. They are used in machining centers, among other things.

[KindaGamey]

couldn't we buy a bucket-load of these, have them sent to mylow, and he could film a run with them placed all around the unit, and on cat, bird, etc.? It might help replicators as well as maybe further convince the skeptics that the magnets aren't made out of chocolate? even just queue's one compass i thought made for some pretty interesting results.

(edit: humph. i've hyperlinked things above but, at least in firefox, they seem to be invisible unless you mouse-hunt for them.)

[BEP]

Interesting thought.

Now that I think again, maybe not. Ever hear of wave particle duality?
The act of measuring something may change the thing being measured.
A compass is a prime example. It creates a line of force where there was none to begin with.

Kind of like Mylow not knowing the polarity or magnetization pattern of his magnets. May be a good thing he didn't know. If he had he would probably never make a spinning thingy.