Working Magnetic Motor on you tube??

[dean_mcgowan]

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]

I can't tell (because i simply don't know).
But our builder was sure aware of those spec sheets.

[Harvey]

@ 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 

Cheers!
Good Job so far

[ebswift]

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]

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