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Author Topic: Working Magnetic Motor on you tube??  (Read 1328983 times)

dean_mcgowan

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Re: Working Magnetic Motor on you tube??
« Reply #630 on: January 13, 2008, 06:27:06 AM »
@Omni

Have you recieved all your parts for replication yet ?

Cheers,

Dean

Dyamios

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Re: Working Magnetic Motor on you tube??
« Reply #631 on: January 13, 2008, 06:29:36 AM »
Oh, good thing you got the tachometer. I just noticed that the useful energy equation calls for rpms as well.

As far as DC motors go, any type will do really. Just make sure it can get up to the desired RPM (and preferably higher).

And for a faraday cage, any fine metal/copper mesh will due. Most EM wavelengths which would interfere are far too long to penetrate a 16th inch mesh or something around there. Just look at the front of your microwave. That little mesh can block 700 watts of 2.4ghz radiation.

Although solid metal shielding would work just as well.


On another note, when performing the experiment, it would be beneficial to videotape all the meters and tachometer and such so it's easier to consolidate and measure the data later. Otherwise you'd need a lot of people watching and plotting each one.

Cheers!

Omnibus

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Re: Working Magnetic Motor on you tube??
« Reply #632 on: January 13, 2008, 06:31:58 AM »
Not yet. I got the magnets, was expecting the bearings today but didn't get them and the parts are probably gonna be ready by Monday, hopefully. They were supposed to be ready by tomorrow (Saturday) but things never work as expected, especially when you're so anxious to start as soon as possible.

Dyamios

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Re: Working Magnetic Motor on you tube??
« Reply #633 on: January 13, 2008, 06:32:04 AM »
Oh, and the data doesn't have to be like... 10 data points/sec, so an RS232 tachometer isn't really necessary. Even 1/sec - 1/4sec would be fine (since it would be possible to form a regression model after plotting the data points).

Omnibus

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Re: Working Magnetic Motor on you tube??
« Reply #634 on: January 13, 2008, 06:35:55 AM »
See, I'm more concerned about the effect itself which has to be documented in detail. That's why the RS-232. You know what ridiculous questions are asked. One would do better to be as thorough as possible.

Omnibus

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Re: Working Magnetic Motor on you tube??
« Reply #635 on: January 13, 2008, 06:37:16 AM »
Tomorrow will try to pull out the bearing from several hard drives. Can't wait until Monday. Does anyone have any experience in that?

Dyamios

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Re: Working Magnetic Motor on you tube??
« Reply #636 on: January 13, 2008, 06:38:29 AM »
Very true, very true. Well, you're free to do whatever you please. If you want a RS232 Tachometer, then by all means get one! Thats the amazing thing about being human  ;)


I've taken apart many a harddrive in my day. The modern ones seem to have the bearings somehow riveted in, glued, or otherwise permanently secured in the metal casing. Some have screws holding them in, but the head type is often obsure or weird such that they are nearly impossible to remove.

Are you looking for a specific type of bearing? I've got a surplus store not far from me which has many different types.
-------------------
Bed time for me

Nicolas Roger

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Re: Working Magnetic Motor on you tube??
« Reply #637 on: January 13, 2008, 07:24:10 AM »
We posted the LaFonte Group replication video: http://www.youtube.com/watch?v=8dRYz1fl98k

Note: We are still waiting for the proper sized magnets to arrive.

sveinutne

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Re: Working Magnetic Motor on you tube??
« Reply #638 on: January 13, 2008, 07:25:48 AM »
Tomorrow will try to pull out the bearing from several hard drives. Can't wait until Monday. Does anyone have any experience in that?

Yes, I have opened several HDD, and they spin OK, but use the HDD casing and spindler, just flip it around. Then you can build a Al rotor in 1 hour. I did that yesterday, but my stator magnet is not right, so it will not self run. (yet), but I can make it sync in non gear mode, and that is good.( both are running CW or CCW).
Svein
« Last Edit: January 13, 2008, 08:19:10 AM by sveinutne »

dean_mcgowan

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Re: Working Magnetic Motor on you tube??
« Reply #639 on: January 13, 2008, 07:29:54 AM »
@ Omni

I am very keen to replicate but still cautious as to whether this is a joke of some kind. I will be a 2nd gen replicator for sure.
The design reminds me of a crop circle I saw once a long time ago. see: http://www.cropcirclesecrets.org/predictions98.html
Its all very exciting though, cant wait to see how you go. Good Luck

Dean

dean_mcgowan

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Re: Working Magnetic Motor on you tube??
« Reply #640 on: January 13, 2008, 07:35:23 AM »
We posted the LaFonte Group replication video: http://www.youtube.com/watch?v=8dRYz1fl98k

Note: We are still waiting for the proper sized magnets to arrive.

@Nicolas

Is this built directly from jdo's spec sheets ?

Good work BTW

Cheers,

Dean

Nicolas Roger

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Re: Working Magnetic Motor on you tube??
« Reply #641 on: January 13, 2008, 07:42:02 AM »
I can't tell (because i simply don't know).
But our builder was sure aware of those spec sheets.

Harvey

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Re: Working Magnetic Motor on you tube??
« Reply #642 on: January 13, 2008, 08:15:42 AM »
@ clanzer

I think your getting some false triggering from the transparency and opacity with the magnets. That looked a lot slower than 73 RPM at the end.

It looks like your bearing efficiency is even better if your initial RPM's were actually 1/8 (assuming the tach was triggering off the mags) of 1000 !

Time for some black tape around the circumference and a reflectodot  :D

Cheers!
Good Job so far

ebswift

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Re: Working Magnetic Motor on you tube??
« Reply #643 on: January 13, 2008, 08:20:37 AM »
Tomorrow will try to pull out the bearing from several hard drives. Can't wait until Monday. Does anyone have any experience in that?
The parts come apart fairly easily.  If you want to disassemble the main drive motor to remove the coils and ring magnet, you drive or press the main shaft out of the base (the shaft is driven out from the base where you can see it in the middle of the motor in the bearings_024 image below).  That doesn't take a great deal of force.  Once that's open, if you work around the coils with a flathead screwdriver the coils will work loose and fall out.  You normally only have to work the coils in a circle twice over.  If you work the coils apart without touching the base you can do this without any scaring (not that scaring will matter too much in here; if you are too rough you can end up with a couple of sharp jaggies sticking up that may grab the top part when you re-assemble, but if necessary you can file those away without affecting smoothness when it's spinning).

At the ring magnet end, generally (depending on the age of the motor) you will see that it is contained inside a metal ring which is pressed onto the top of the motor assembly.  With a pair of adjustable pliers/multigrips or a vice you can progressively squeeze that metal ring from a few angles and it will pop off without scaring anything.  You can then gently knock the assembly back together and it will be a free-spinning bearing without the coils & magnets.

edit: here are the kinds of bits you end up retrieving (these are from older drives):

http://www.ebswift.com/WhipMag/Bearings_022.jpg
http://www.ebswift.com/WhipMag/Bearings_024.jpg
http://www.ebswift.com/WhipMag/Bearings_025.jpg

Jdo300

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Re: Working Magnetic Motor on you tube??
« Reply #644 on: January 13, 2008, 08:45:37 AM »
Hi All,

Looking good so far! Omnibus, great to hear that you'll be ready to roll by Monday. As for everyone else, about when do you all expect to start preliminary testing?

In the meantime, I was thinking that it may be a good idea to put together a PDF with a listing of different experiments that we should all try. I've seen many people come up with lots of good ideas but perhaps it would be a good idea to come up with something like this before we all start testing (especially if we all manage to get it working). Then we will all have a set of standards to follow so we can compare data. If you are interested, just post your test ideas (old and new), and I'll see if I can compile a file for everyone.

Speaking of which, did Al ever see if he could get the motor to sync up with only one stator? Or did he always have to start it with three and then stop the first two?

God Bless,
Jason O