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[CLaNZeR]

Hi Craigy

I like the idea of the single Disks stacked together as you can alter the offset and also the spacing to suit the Stator magnets.

Knocked up some CNC code below and tempted to mill out some wheels in the shape shown to make 4 disks or clear the center and make it into a cylinder using individual disks . Then maybe place a thin strip of metal over each angle as such.

The shape probably needs altering to fit the original, but gives an idea of what I mean.

(http://www.overunity.org.uk/SMW1.jpg)

(http://www.overunity.org.uk/SMW2.jpg)

(http://www.overunity.org.uk/SMW3.jpg)


Cheers

Sean.

[crazyman]

You know, I really do hope its something real.
As far as cleverness goes, both designs are well, rather clever.
The hard drive platter is a interesting material as well.
Good luck builders, at least it looks like fun tinkering with..

[Craigy]

Nice idea Sean, I was thinking along similar lines, the metal strips to me used could be cut into triangles as i mentioned a while back or as you have thought create a magnetic gradient ( tooth) instead of cutting the metal into a funny shapes which was putting me off as it would be rather teadious. Doing it your way would mean cutting and stickin a small rectangular section of steel on each tooth, a lot easier if you can cnc the wheel.

Have you thought about he metal used? i have contemplated everything from sections of hard disk drive shielding to baked bean cans

I found about 100 ferrite beads today,( tubular 4 by 4mm)  and may well hot glue them to my rotors for a laugh, ( easier than cutting metal) I wonder what would happen with a crossfield array..Might be  good to use some of he stuff we learned on the dark side 

[CLaNZeR]

Nice idea Sean, I was thinking along similar lines, the metal strips to me used could be cut into triangles as i mentioned a while back or as you have thought create a magnetic gradient ( tooth) instead of cutting the metal into a funny shapes which was putting me off as it would be rather teadious. Doing it your way would mean cutting and stickin a small rectangular section of steel on each tooth, a lot easier if you can cnc the wheel.

Have you thought about he metal used? i have contemplated everything from sections of hard disk drive shielding to baked bean cans

I found about 100 ferrite beads today,( tubular 4 by 4mm)  and may well hot glue them to my rotors for a laugh, ( easier than cutting metal) I wonder what would happen with a crossfield array..Might be  good to use some of he stuff we learned on the dark side 

I reckon any bits of thin Iron would be okay, as long as it is bendy enough to follow the angles.
Even popping an Iron bar in your lathe and doing some nice fat curly cuts of about 1mm shavings would do mate
They would follow the contour and could be stuck on easy enough.

As usual let me know if you want any disks cut. Be good to get a pattern and angles, along with the theory from the Artist first !

Reckon we been away too long on the Darkside sometimes hehehe 

[Neoerg]

Interesting video. I may attempt a replication of this over the weekend. It would be interesting to measure the effects of a magnet on a single flattened screw. I was wondering if the flux being drawn to a point like that may draw eddy currents along bunching up at the point. That could be dispersing the lines, helping it "slip" past.  "Helical Flux Slip Motor"  =)

btw this is my first post here after reading the forums for the past week....losing sleep I might add.

[hartiberlin]

Hi Sean,
I don?t understand your CAD drawings.

Where do you want to mount your magnets to these wheels ?


The objective is to have no iron get closer to the magnets,
but have different thickness of iron in front of each magnet, so
one screw row pulls the other screw row forward.


I just had an idea, just first to do it in a linearfashion,
so tape for instance on a big platsic ruller 4 rows of iron
pieces, that are flat but look like a triangular and see, if you can
accelerate the ruler linearly into one direction by bringing the
4 stator magnets near it.
Then we can first optimize the shape of the needed iron
parts and then later put it onto a bigger diameter circle wheel.

I guees, the bigger the diameter ofthe wheel is, the better it will work.

It just reminds me a lot of the experiments Dave Squire had done
a few years back with the MFT ( magnetic flux turbine) on
the yahoogroups ou-builders list.

I will upload the files from there into a more easily accessable directory
over here at overunity.com now.

Regards, Stefan.

[hartiberlin]

Okay, here are now the MFT files.

http://overunity.com/mft/

Study them all in very much detail !

Especially these 3 files are very important and I think Dave Squires
is one of the original pioneers who brought the easy overunity magnet flux switching
into this world.

(http://overunity.com/mft/img002.gif)

The trick is to have an iron ring around the pole of a magnet so the flux
can be shorted out via this iron core ring back into the stator itsself,
when the rotor iron parts moves along.
This way you can achieve much easier leaving of the rotor part
and the flux is much more easily switched to the next incoming
rotor part and then this part is rather atttracted.


Here you can see, how the 2 piece-rotor part (red line encased) looks very simular to the screw:


(http://overunity.com/mft/MFT-force-in-load-sp.gif)


And here is a measurement chart from FEMM simulation to show the
forces over a complete cycle. You see that the force is much bigger
in the positive direction than the negative, so it does not cancel out,
but works as a permanent magnet motor.

(http://overunity.com/mft/MFTFORCE.JPG)


So now back to this screw motor,
it would be very benificial, if you replication guys could
put 4 small iron core rings around the 4 stator magnets.
This way the flux is much more easily switched from one screw
to the next one.

Hope this helps.

Regards, Stefan.

[hartiberlin]

Study this GIF animation in slow motion
and you will see, how an iron ring around the
stator magnets will improve the flux switching
from one rotor piece to the next one coming into the
flux gate tunel.


(http://overunity.com/mft/grah2.gif)



Okay, with the screw motor we have no closed magnet pathes,
but with FEMM it is much easier to simulate these closed magnet pathes
and to make the screw motor more powerful , you could also built it by using
permanent magnet flux gates
like in this animation, so these would need to
go inside the ring and outside the ring, so the screws would be entering a real flux gate
like shown in the animation.
So you would also use the back poles of the 4 stator magnets
to attract the screws from the inside of the rotor plastic ring,
not just from the outside !

[hydrocontrol]

it would be very benificial, if you replication guys could
put 4 small iron core rings around the 4 stator magnets.
This way the flux is much more easily switched from one screw
to the next one.

That is exactly why I brought up the possibility in another post that the bracket was a magnetic material like iron instead of aluminum.
An iron or soft steel bracket should produce close to the same effect.
You would not even need iron core rings for the entire magnet.
Just another piece of flat steel across the front side of the magnets
 (not the poles but opposite the bracket) should work.

Tom

[hartiberlin]

You are absolutely right Tom !

[hartiberlin]

If you compare it with a standard flux gate,
(no MFT type)
the force is much higher for the rotor-iron-piece to leave
as can be seen here in this picture from the mft directory.

All the flux still wants to hold the iron rotor piece,
so it is much more sticky:


(http://overunity.com/mft/SFG-force-out-load.gif)

[hartiberlin]

I tried to desgin a few years back with it this magnetic train idea,
but haven?t had the time to check further into it,
You need the exact right dimensions for the stator iron "rail-pieces"
and the linearly moving "rotor-train".

Here are 2 simulation pictures from it.

(http://overunity.com/mft/pmtrain01.gif)

(http://overunity.com/mft/pmtrain02.gif)

But it still must be some other way designed, so there is this caliper
ring directly around a magnet inside its core, so the magnet flux
can more easily switch between the last and the next iron stator
"railtrack" piece

[hartiberlin]

P.S..
My second train version:

http://overunity.com/mft/pmtrain02.gif

could probably work,
if the rail iron pieces would have some kind of triangular
shape , simular to the screws which
user xpenzif has used in his magnet screw motor.

But you could not see it in the
http://overunity.com/mft/pmtrain02.gif
picture, cause this is a side view !

[rice]

sorry to say everyone
i just finished building this exactly like the film.  i grinded the heads perfectly, i used the same exact screws,  i used the same exact magnets,  i drew a cad template and lined everything up perfectly.  it just doesent work.  its like every other false bullsh i t  claim that has come through this site.  no offence to anyone on this site but how many other people went out and spent 50 bucks on magnets, screws, gluegun,  pipe and whatever else only to find you have built another non working magnet motor,  throw it on the pile with the other non working contraptions you have built over the years

build yourself a wind turbine or something that will actually make energy for free.  there is no free lunch

[hartiberlin]

@rice
can you post a picture ?
Maybe you did something wrong ?

How did you mount your 4 stator magnets ?
Onto an iron bar bracket holder ?

It should be probably iron, not aluminium.