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[xpenzif]

The motor in the video was made out of a piece of pvc, the magnets are(I think) Nd45, definitely with poles on the smaller ends.
Screws aren't really necessary, you can build one by cutting washers in half and grinding one side down. Here's a picture of part of a tiny spindle for a desktop toy using the washer design:
(http://img139.imageshack.us/img139/5113/brokenspindlelt3.jpg)
This design makes it easy to adjust the angles the washers relative to each other; less change in angle=more torque, more change in angle=more speed, less torque(this can also be accomplished to a degree by changing the magnet arm angle).
The above design uses a lot more magnets. I recommend a shaft made from a non-ferromagnetic bolt.

[Freezer]

Man.. interesting stuff.  I see the spiral taking shape in your designs.  I wanted to know more about your magnet set up.  Can you explain exactly where the north and south poles are? Is each magnet in the same orientation, or does it alternate?  Anyways thanks for sharing.

[Omnibus]

I am what I am omnibus,

You are just a prize arsehole!

Hans von Lieven

I think Stefan should delete this.

[Omnibus]

The motor in the video was made out of a piece of pvc, the magnets are(I think) Nd45, definitely with poles on the smaller ends.
Screws aren't really necessary, you can build one by cutting washers in half and grinding one side down. Here's a picture of part of a tiny spindle for a desktop toy using the washer design:
(http://img139.imageshack.us/img139/5113/brokenspindlelt3.jpg)
This design makes it easy to adjust the angles the washers relative to each other; less change in angle=more torque, more change in angle=more speed, less torque(this can also be accomplished to a degree by changing the magnet arm angle).
The above design uses a lot more magnets. I recommend a shaft made from a non-ferromagnetic bolt.

Thanks for the details. While I'd like to replicate the experiment exactly as you have shown it in the video, I'm curious if you have a video of this last design in motion. Also, what are the exact dimensions of the magnets and the angle at which the rows of screws are slanted with respect to the cylinder generator line? Hope many people can reproduce the device as shown and then go further with the improvements. All the best.

[markdansie]

I like your design,
Just one question, did the washers or screws become magnetised after time and did it change the performance? If this was the case would a set of identical magnets with oppersite poles placed in the sytem help?
Kind Regards
Mark

[Jdo300]

The motor in the video was made out of a piece of pvc, the magnets are(I think) Nd45, definitely with poles on the smaller ends.
Screws aren't really necessary, you can build one by cutting washers in half and grinding one side down. Here's a picture of part of a tiny spindle for a desktop toy using the washer design:
(http://img139.imageshack.us/img139/5113/brokenspindlelt3.jpg)
This design makes it easy to adjust the angles the washers relative to each other; less change in angle=more torque, more change in angle=more speed, less torque(this can also be accomplished to a degree by changing the magnet arm angle).
The above design uses a lot more magnets. I recommend a shaft made from a non-ferromagnetic bolt.

Hi xpenzif,

Thank you very much for sharing your new design with us. This one looks even simpler than the first! Now, just to make sure that I understand how you have it setup, I drew a quick drawing of the setup based on your description. Do I have the orientation of the magnets correct? Also what size washers and screw did you use for that model? From looking at the photo, I'm guessing you used 1" washers with a 0.25" bolt?

God Bless,
Jason O

[helmut]

The motor in the video was made out of a piece of pvc, the magnets are(I think) Nd45, definitely with poles on the smaller ends.
Screws aren't really necessary, you can build one by cutting washers in half and grinding one side down. Here's a picture of part of a tiny spindle for a desktop toy using the washer design:
(http://img139.imageshack.us/img139/5113/brokenspindlelt3.jpg)
This design makes it easy to adjust the angles the washers relative to each other; less change in angle=more torque, more change in angle=more speed, less torque(this can also be accomplished to a degree by changing the magnet arm angle).
The above design uses a lot more magnets. I recommend a shaft made from a non-ferromagnetic bolt.

Hi xpenzif
Thanks for sharing and beeing here.
You make one time more,this Forum become a special Place.

helmut

[ken_nyus]

Hi xpenzif,

Thank you very much for sharing your new design with us. This one looks even simpler than the first! Now, just to make sure that I understand how you have it setup, I drew a quick drawing of the setup based on your description. Do I have the orientation of the magnets correct? Also what size washers and screw did you use for that model? From looking at the photo, I'm guessing you used 1" washers with a 0.25" bolt?

God Bless,
Jason O

I think you are missing two details...

The spiral offset of the washers, and the thinning of the material of the washers.

[hydrocontrol]

Xpenzif,

I am skeptical that this new design is going to work. At least with the other design with the large diameter cylinder you had a chance of keeping the screws from getting magnetized in one direction by having another magnet set row opposite of the existing one but with opposite poles. Not only would that setup add more pulling power it would have kept the screws from getting a magnetic memory. The two magnet rows would be far enough apart because of the large diameter cylinder to keep from interfering with each other. With this new smaller design there is no room for adding more magnets so we could not get more power or faster rotation. In fact the magnetic field of the magnets may just swamp the whole setup unless you use really tiny 1/8 square magnets. The only solution would be to have huge washers then you are basically back to a large cylinder. Even then the whole washer will contain a magnetic field. The individual screw limits magnetic field interaction with other screws which I think is part of the reason it was working. Why are you giving up on the first design ? It looked promising and you stated that it ran a whole night. Why did it stop ?  Please show us a video of the first design running for 10 minutes. Maybe we can help get it running longer than a whole night.

Later,
Tom

[Jdo300]

Hi xpenzif,

Thank you very much for sharing your new design with us. This one looks even simpler than the first! Now, just to make sure that I understand how you have it setup, I drew a quick drawing of the setup based on your description. Do I have the orientation of the magnets correct? Also what size washers and screw did you use for that model? From looking at the photo, I'm guessing you used 1" washers with a 0.25" bolt?

God Bless,
Jason O

I think you are missing two details...

The spiral offset of the washers, and the thinning of the material of the washers.

Hi ken_nyus,

Thanks for the tip, I did forget to show the thinned out part of the washers, but as for the spiral offset, I didn't draw that in detail because I was mainly trying to show the position of the magnets.

@Tom,

Assuming that I have the positioning of the magnets right in my picture, maybe we could simply add another set of magnets on the opposite side of the rotor with their south poles facing the washers, that way the washers are constantly changing their magnetic orientation rather than getting saturated. in one direction.

God Bless,
Jason O