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[Omnibus]

I'm wondering if one could use the magnet sheets that they sell at home depot etc. to cut out these triangular shapes. This would take care of the problem of the screws eventually becoming magnetized.

I think screws getting magnetized should be the least of your worries at this point. Show a replica making full turns, as many as in the video, possibly a little more, and then we'll worry about magnetization of the screws (no worry at all).

[eavogels]

Flattening of the heads of the screws is seen when carefuly observing the close shots in the video. Also, it was mentioned in the youtube discussion.

I found it. He wrote:
Honestly screws were a bad idea and took a lot of work flattening, you can probably find something better than screws.

When looking very close; the whole screw was grinded in the shape of the PVC.

Eric

[erickdt]

I'm wondering if one could use the magnet sheets that they sell at home depot etc. to cut out these triangular shapes. This would take care of the problem of the screws eventually becoming magnetized.

I think screws getting magnetized should be the least of your worries at this point. Show a replica making full turns, as many as in the video, possibly a little more, and then we'll worry about magnetization of the screws (no worry at all).

Well I was also thinking it would make it easier to build as the magnetic sheets I'm talking about have adhesive already on their backs.

[Omnibus]

Flattening of the heads of the screws is seen when carefuly observing the close shots in the video. Also, it was mentioned in the youtube discussion.

I found it. He wrote:
Honestly screws were a bad idea and took a lot of work flattening, you can probably find something better than screws.

When looking very close; the whole screw was grinded in the shape of the PVC.

Eric

That's a mistake to abandon the working model and push everyone elsewhere into untried territories. This absolutely shouldn't be done. Reproduce this exactly as is and then further it.

As for the screw ground into the shape of the PVC, I don't seem to see it. It appears to me that both the front of the head and the back are filed so that the screw can lay flat on the surface to a certain extent while the outer surface goes flush with the stem of the screw. What is relied upon is the fact that the thicker part of the (already flat) screw is attracted more than the thinner one. This is what @xpenzif also says in the video.

[Pirate88179]

http://www.youtube.com/watch?v=Int5za7Eslo

What about the design in the above link that I posted earlier?  I am working on a similar design but it is very related to the video discussed in this thread.  Does anyone think this video is faked?  Or maybe he is using pulsed electromagnets?  I will try to post some pics of my device.  Thanks.

Bill

[Omnibus]

Well, if your device works, that is, turns without any input energy as in the discussed device here that would be fabulous. Waiting to see it.

[Omnibus]

@xpenzif's device seems as simple as can be, though.

[eavogels]

As for the screw ground into the shape of the PVC, I don't seem to see it. It appears to me that both the front of the head and the back are filed so that the screw can lay flat on the surface to a certain extent while the outer surface goes flush with the stem of the screw. What is relied upon is the fact that the thicker part of the (already flat) screw is attracted more than the thinner one. This is what @xpenzif also says in the video.

Okay, I grinded a screw. I held one against my grinding wheel and I grinded a bit of the whole side of the screw, not only the head. Now the part of the screw that is left, fits very well on the round PVC. I tried to make a photo but I cannot zoom in so I made this drawing to show what I mean.

Eric

[NerzhDishual]

Hi Ommibus and everybody!

I agree with you about trying to replicate the initial model as accurate as possible.

BTW1: I also think that the "the whole screw was grinded in the shape of the PVC". (Eavogels).

BTW2 : have you noticed that in the Steorn forum 'they' (this load of spektic trolls) seem not to be interrested in this device and seem to prefer discussing about useless topics? Are they not?

Best

[Pirate88179]

@Omnibus:

Yes, it is very simple, which is usually best right?  Someone mentioned the fact that the screws were not all in a precise allignement.  I also believe it is possible that it is this non-precision that possibly eliminates or greatly reduces the sticky spots.

I am not using screws on my device and I don't consider it a replication.  I have magnets around a drum mounted on my good old hard drive spindle motor in a helix pattern, similar to the screw layout.  I am now constructing the stationary post, or posts which house the repulsion magnets that line up with the ones on the drum.  Thus far, I have to say that I still feel sticky spots when experimenting by holding posts in my hand. It runs for a 1/4 turn before finding equilibrium. I am going to mount the posts and experiment with polarity and angle changes to see what happens. I'll try to post some pics tonight.

Bill