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[hydrocontrol]

Wow Eric.. One screw done.. How many more to go ? Hope your fingers hold out.    I suggested before screwing several into a piece of wood then grinding them all at once. Maybe you are doing that.. Great to see a lot of replications already going on. Hope it is not too much a waste of time.

Later,
Tom

[Omnibus]

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

Now, Eric, that side may be so. Couldn't tell. It seems, though, you should file the left side too and make it flush with the stem of the screw.

[erickdt]

I am now constructing the stationary post, or posts which house the repulsion magnets that line up with the ones on the drum. 

I think that using repulsion of the magnets will not work out. The ammount of resistance to the wheel moving forward will always be the same as the ammount of push you are recieing on the other end. The result is a null effect. Attraction on the other hand is a different thing all together. IMO

[Omnibus]

@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

As I said, I'm not in favor of trying modifications but let's see what will come out of your experiment. Crossing fingers.

[Omnibus]

@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

I've left them for a while. If this turns out to be real not only Steorn will be gonners.

[eavogels]

Wow Eric.. One screw done.. How many more to go ? Hope your fingers hold out. 

I had the screw in a tool and it only takes 30 seconds or so. I think that the hardest part is to get them all the same.
Eric

[CLaNZeR]

Well nothing exciting to report so far

Will try bury each head into the cardboard pipe to make them follow the curve a bit more, but cannot be assed to spend that much time grinding them all down, unless given more specifics from the original artist as such

Must admit even without the heads ground down I would of expect atleast a little movement, and if that had occurred then fine tuning such as grinding the heads would of been the next step.

All good fun though.

The pictures show N38 5mm*3mm magnets , 3 stacked on each level.
HD bearing stripped of its coil winding to clear any lag and oiled with fine oil. You can blow on it and make it move it is so loose.

Cheers

Sean.

(http://www.overunity.org.uk/SM3.jpg)

(http://www.overunity.org.uk/SM4.jpg)

[CLaNZeR]

Good luck. Just to mention, did you notice that in the original the heads of the screws are flattened, as we discussed above? Perhaps this won't matter. Let's see.

Yep agree, lets try the easy route first.

Also, is it me but it seems that the PVC base isn't exactly a cylinder. Also, the magnets aren't aligned quite perfectly. Look at the third from the top. The top magnet seems closer to the screws than the bottom, etc. It's amazing that even such an apparently crude construction turns as nothing else so far does. Torbay's wasn't perfect either but we never saw it in action (except for that propaganda clip where details were smeared, nothing like here).

There is no magnets in my first pictures?

Cheers

Sean.

[hartiberlin]

Hi Sean,
well quickly done.
Maybe your magnets are a little too small.

I think it really depends also on the exact sizes
you use.
Good luck.

[Omnibus]

Good luck. Just to mention, did you notice that in the original the heads of the screws are flattened, as we discussed above? Perhaps this won't matter. Let's see.

Yep agree, lets try the easy route first.

Also, is it me but it seems that the PVC base isn't exactly a cylinder. Also, the magnets aren't aligned quite perfectly. Look at the third from the top. The top magnet seems closer to the screws than the bottom, etc. It's amazing that even such an apparently crude construction turns as nothing else so far does. Torbay's wasn't perfect either but we never saw it in action (except for that propaganda clip where details were smeared, nothing like here).

There is no magnets in my first pictures?

Cheers

Sean.

Sorry, I wasn't clear. I was commenting on @xpenzif's video.

[hartiberlin]

Hi Sean,
I guess with these small diameter magnets your screw head just sticks too much..
You probably need to grind them off or use bigger diameter magnets, so the flux
will reach out also to the end of the screw and also attract this.

Can you post a video and show exactly where it still sticks ?

[CLaNZeR]

Hi Sean,
well quickly done.
Maybe your magnets are a little too small.

I think it really depends also on the exact sizes
you use.
Good luck.

Hi Hart

Looking at the original video again, I would say he is using close to 5mm rod magnets.

If I bring the arm within say 5mm of the screws and spin the Rotor by hand, I can certainly feel the vibration and interaction from the magnets acting on the screws. Also they ripped a couple of screws off that had to be re-fitted LOL

I tried some 10mm rods but way too strong and also some 6mm cube magnets, but trying to keep it a little bit close to the original LOL

Would love some feedback by the original artist, so lets hope he pops back in.

Cheers

Sean.

[CLaNZeR]

Sorry, I wasn't clear. I was commenting on @xpenzif's video.

Ah sorry mate, confusion again LOL

Cheers

Sean.

[CLaNZeR]

Hi Sean,
I guess with these small diameter magnets your screw head just sticks too much..
You probably need to grind them off or use bigger diameter magnets, so the flux
will reach out also to the end of the screw and also attract this.

Can you post a video and show exactly where it still sticks ?

Let me do a quick shoot

BRB

[hartiberlin]

Hi Sean,
I had another closer look in fullscreen modeof the original
video of user xpenzif
and I can see now, that the screws are really all very well
grinded off and that there sticks no "hill" out at the head,
so this makes a huge difference to your unit, as
the distance from the magnet to the screws does not
change much in xpenzif?s video, but just the thickness
of his iron mass of the screw.

In your replication, as there is the "hill" of the screw hat
you have much bigger attraction forces to overcome
due to the nearer distance which goes into a square factor !
in the attraction formulars
and thus it is far more sticky.

I hope you still can change your screws by grinding off the heads
enough.
Just as another user said, screw a few of them into wood and use
a grinding tool to braze  the head "hill" off at one side or (both sides ?)


Good luck !

Regards, Stefan.