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[Jdo300]

Oops, duplicate post

[argona369]

Hi  xpenzif,

You have some interesting designs with  this split  washer device,
Maybe at some point too even get some static electricity in there somewhere. 
But can we go back to the original design for replication of the
original effect. And a longer video. I wonder if the ?effect?
Is just the magnetization of the screws.
One step at a time please.
Thanks.

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:

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.

[CLaNZeR]

Good stuff Xpenzif

If you used Cardboard Pipe, instead of the PVC you could bury the screw heads instead of having to flatten them.

I have used HD bearings also on test rigs and although they are loose, they are not loose enough for small interactions. Some mini RC bearings top and bottom with a lathed down shaft inbetween, will give a really loose Rotor and these interactions shown in your video should speed it up very easly.

Look forward to more details and more videos, and will defo be up for quickly replicating this.

Cheers

Sean.

[hydrocontrol]

Sean,
 Great idea. Better still. If you want to use PVC just drill a large (head size) holes where the screw head would go. No grinding screws and the placement would be more exact. Just lay the screw in place with the head inside the hole and add a bit of PVC glue. This is getting my building juices going. Waiting for more video and more info of the original before deciding to start. Need details such has how many rows of screws, size of pipe, size and type of screws, size and type of magnets, etc. Got PVC, PVC end caps, stainless steel rod, roller skate bearings, hardware store down the street for screws, and tons of different magnets (from previously failed prototypes). Just need details and a better proof video.

Later,
Tom

[CLaNZeR]

Better still. If you want to use PVC just drill a large (head size) holes where the screw head would go. No grinding screws and the placement would be more exact. Just lay the screw in place with the head inside the hole and add a bit of PVC glue.

Hi Tom

Yep, if this is for real and no trickery has been used, then very interesting indeed. I wish the video had been shot with atleast a bit of voice over to rule out any of that sort of stuff must admit.

I think even drilling the pipe for each head would be a long job, seems there is probably about 40-50 screws used there. If PVC pipe is the only option, then another method could be to mark your PVC pipe with lines and then heat the screws up, so as they are placed, they melt into place as such.

Easier option would be to get angled shafts of metal and simply stick them on, but trying to think what would be suitable.

Cheers

Sean.
 

[ken_nyus]

Be careful heating PVC up, I understand the fumes can be dangerous. I try to use hand tools only with PVC.

[hydrocontrol]

Wow Ken.. I was just going to write back with that. yep. Melting PVC fumes are really bad... Drilling 50 or so holes not that bad. Just a bit of time but could help the placement of screws a bunch and keep your health  .

If this really works I got some more ideas for improvement. My biggest concern is that the hard drive platter is adding a major part in this. Time will tell..

Later,
Tom

[Craigy]

very interesting concept, and i i'm up for replicating it. As people have said , the only reserations i have are the lack of good sound, and the hard drive bearing. In good faith i assume that the hd bearing has been gutted of the motor contents. But if it does work with just a gutted hd bearing which after much experimentation is not the best bearing in the world it should work with practically any bearing.
It occurs to me that the screws could be replaced with triangles of steel, or the sprial rotor . Still trying to understand where the sticky spot has gone tho..lol

[LarryC]

I cut a small elongated triangle from laminate steel and manually testing with a small nd40. Pull from large side is at least 5 times the pull from pointed side (just a rough guess). There should be no sticky point going from the 4th triangle to the 5th. Can easily slide to middle of triangle, so maybe the attraction of the next triangles large side will be enough. Can anyone Simm?

[hansvonlieven]

Better still. If you want to use PVC just drill a large (head size) holes where the screw head would go. No grinding screws and the placement would be more exact. Just lay the screw in place with the head inside the hole and add a bit of PVC glue.

Hi Tom

Yep, if this is for real and no trickery has been used, then very interesting indeed. I wish the video had been shot with atleast a bit of voice over to rule out any of that sort of stuff must admit.

I think even drilling the pipe for each head would be a long job, seems there is probably about 40-50 screws used there. If PVC pipe is the only option, then another method could be to mark your PVC pipe with lines and then heat the screws up, so as they are placed, they melt into place as such.

Easier option would be to get angled shafts of metal and simply stick them on,but trying to think what would be suitable.

Cheers

Sean.
 

Try horseshoe nails, they are flat and just the right shape if trimmed. They are also the right kind of material.

(http://www.australiannails.com/images/home_mainpic.jpg)

Hans von Lieven