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[CLaNZeR]

I hope you still can change your screws by grinding off the heads
enough.

I think you are right, it is sod all to do with the screws but more to do with using metal that has a slight slant.

What we maybe need is to replace the screws with slanted pieces of metal as suggested by others, but also thaty fit the curve.

Something like chopping up a piston ring and grinding down the angle, but alot of work

Will see if the chap comes back with more info I reckon.

[paulshroom]

Hi CLaNZeR,
Your screws seem to have a small point at the end a strait bit in the Midol and a flat end at a right angle to the stem.

Were as the originals have a more tapered shape and stem and attached to that a tapered head, giving a much smoother transition. 

Where the originals flattened with a hammer?

This would give a work hardening affect and would make them slightly denser from being squashed and have a harder composition at one end.

The plastic type material my hold sum electrostatic vortex type reaction/property /effect/buildup. It was insulated by the wooden board to.

Maybe the spiral of the screw its self helps with the cogging effect as you may get a similar effect as in this video?

http://www.youtube.com/watch?v=me5Zzm2TXh4

Think it need to be a carbon copy ; )

Extremely good effort though, just making observations.

Good luck to you,

Regards Paul.

[paulshroom]

Just looked at the new clip of the replication, think you might be pushing it the wrong way round.

[CLaNZeR]

Just looked at the new clip of the replication, think you might be pushing it the wrong way round.

CCW the same as the original

[Omnibus]

Video attached. Excuse the music, was the last track I had loaded in Windows Movie Maker LOL

Tried attaching movie to this post but timed out twice now, so have uploaded to my server:

http://www.overunity.org.uk/CLaNZeRSScrewMotorEffort1.wmv

Cheers

Sean.

Thanks @CLaNZeR for sharing this with us. I think next step should be to flatten the heads of the screws both ways (front and back). Another thing, the screws don't seem to be the type @xpenzif uses. The heads of his screws are conical which affects the distribution of the field when flattened. The screws in your device even when their heads are flattened will have a too sudden transition from high attraction to low attraction. Seems like a small detail but, who knows, in view of the importance of the shape of the fields this may have some importance. Good job otherwise.

[paulshroom]

Extremely sorry my mistake.
I have seen all different type shapes of screws you may want to consider.
This may be worth pondering?
http://images.google.co.uk/images?hl=en&q=screw&oe=UTF-8&um=1&ie=UTF-8&sa=N&tab=wi

[zero]

well, he had to flatten the screws so that the Neos would get closer to the screws.
Looks like your version is a little too far for the attraction forces to grab hold.

 Also, it almost looked like the stator was at an angle to the rotary disc -
thus the top magnets were further away from the rotor than the bottom
magnets.  Maybe it was a perspective trick tho,  Not sure.

[billmehess]

Take a look at my replication
www.youtube.com/watch?v=DQAWmUm6fEs

I can get about a 1/4 turn at this point. Screw placement is very critical. I noticed that the area where the 1/4 turn (about 2 1/2 screw lengths) is slightly different in configuration than the rest of the arrangement so I will attempt to replicate that throughout the whole surface of the coil.
I am using a 3 in. pvc with 1" screws
Bill

[zero]

 Ok, I think I see problems with both replica's...

 (besides the grinding)


  The VERTICAL distance between your screw placements are way too far apart.

 When you look at the original, the screws flattened Ends (large end) are not
even spaced a  millimeter vertically from the next screw below it.   The reason
it doesnt touch, is because the screw below is placed a bit to the side of it.

 Very easily,  just run the video clip, and pause it when he flips the thing up
showing the underside,  and enlarge to full screen.   Get the right correct spacing,
(and angles) as that seems to be very important.

[zero]

Remember also, you have to think in 3d.   If the screw head is not
flattened... the magnets will be trying to pull only the outside lip...
and cant get a good grip on the thing.

 The flattened head allows the magnet a much greater surface area
to grip onto.   And because its flattened,  you can place the magnets
even closer to the screws, giving them even more pulling power.