Howard Johnson Replication Tube Claim

[CLaNZeR]

i don't know for the others.
i am here because i wanted to believe.
the problem is what my eyes are seeing in the various videos.

Ex:
one video show a counter weight and the disk rotate clock wise.
that disk was not at level, to me, as i noticed that it got a tendency to move by itself at some point.
no, it was not when near the magnets.

an other video, on same table, without the counter weight, rotate counter clock wise.
clearly, to me, and some other have noticed it too, that disk is not at level.
it exhibit the reverse of the previous video, that lead me to think that the stator magnet is weaker then the gravity pull on the rotor magnets.


hopefully you will prove me wrong and that what i noticed have no effect at all on this device

Hi NOP

I also have seen a number of anomalies in Mylow's video's and you are right to check them out.

All part of the ride

Cheers

Sean.

[sterlinga]

It seems in my searching around for magnets that the most important component to be able to source cheaply will be the rotor magnet, since there are so many of them in the device.

Every alnico I've seen that comes close to Mylow's size that is in stock are way too expensive to be feasible for an open source project that needs to be affordable.

I would like to try for something along the lines of what was posted the other day:
http://peswiki.com/index.php/OS:MYLOW:Variants

alnico 5 vs neo40 + 1006 steel

The question is one of sourcing here:

Where might I get little chunks of 1006 steel that would match up with a small magnet, to mimic the shape of the alnico channel magnet?

I'd like to target a price of $1 per rotor magnet equivalent.

Suggestions?

I'd even be willing to try something 2x bigger in magnet size than what Mylow used, as long as I can find a stator magnet that meets the criteria he described the other day: long enough to span two rotor magnets and their gaps and overlap onto the third rotor magnet.

I would appreciate it if one of you could point me to a set of materials that will match up.

We have people in the San Francisco area who could most likely machine the rotor disc part, if only we can find the magnets.

I so much want to have one of these Mylow motors running to set in front of the San Jose University group we'll be presenting to on Thursday night.
http://peswiki.com/index.php/Events:Breakthrough_Power_March_30_-_April_2%2C_2009

Sterling

[capthook]

Where might I get little chunks of 1006 steel that would match up with a small magnet, to mimic the shape of the alnico channel magnet?

McMaster-Carr is one of the few, easy sources for 1006 steel.  It is reasonable priced and comes in many dimensions.  If you go with 1018 steel etc., there are many more sources.

http://www.mcmaster.com/#steel/=17ur45

(edit: other 1018 steel online suppliers in order of preference but McMaster is good too:)
http://www.speedymetals.com
http://www1.mscdirect.com
http://www.grainger.com
http://www.onlinemetals.com
http://www.metalsdepot.com/

[hansvonlieven]

Studying Howard Johnson's book The secret world of magnets I came across the drawing below. It shows the magnetic orientation of the C shaped magnets he was so fond of. Surprisingly they are not magnetised like a horseshoe magnet.

Of Significance? I don't know. Worth knowing though.

Hans von Lieven

[Lakes]

Hi Fausto

Okay, just for you mate

http://eclipse-magnetics.co.uk/product/magnet-materials/cast-alnico/minor

Part number M4144ANK at £0.90 each

You can now see how my layout fits with the 8mm wide Rotor magnets I have.

The stators are E824 the closest I could get to Mylow's at the time

http://eclipse-magnetics.co.uk/product-categories/magnets/castalnicomagnets/buttons

The Rotor I got a CNC shop in UK to do for me. Are you in the UK?

Cheers

Sean.

Did you buy direct from Eclipse?, I don`t see any prices on their website.