Working Magnetic Motor on you tube??

[robbie47]

Removed, double post

[CLaNZeR]

1) whats this green/blue stuff: chewing gum? For extra weight?
2) Why are you applying the dampers? They are suppose to reduce speed, but you don't want that right now, don't you?

Hi Robbie

The Blue Tac is there to bring the weight of the Stator Magnets upto 10g each.
I have started on my final Stators now.

Regards the Dampners, while doing wind down tests I came across this:

NOTE: knock a 0 off the end of each RPM mark so 4500 =450 rpm



As you can see the Dampners do carry the Rotor for a bit longer before the drop.
So not only do they maybe act as brakes up the up but also on the down.

I was actually shocked to see the difference as I dismissed the dampners a little, but it does look like they do indeed have an effect bigger than I thought.

I am not sure if the Dampners I have used are made out of 6061-T6 but have some 1/2" bars hopefully here tomorrow of the 6061-T6 and will be interesting to compare the difference.

Be interesting too see what the correct Dampners do when they arrive.

Cheers

Sean.

[vipond50]

@Omnibus
What grade of bearing did u incorporated into your Stators? I recall u stated "R3", Was curious to what the runout is in the "Y" axis with the single bearing as per the Replication specification in your Rep.

Best Regards
Bill

Yes, indeed, the stator bearings are R3 unshielded. Don't understand what you want me to do. If you're curious about the wind down time, it's almost instantaneous. When spinning it by hand it makes 2-3 turns and stops. Let me know if you want me to try something else here.

Hello
No, No test requests from me, Sounds like the bearings are to loose (wobble). I found this with the R3 bearing. The R3 i believe is a ABEC - 1 grade (the lowest). I am switching to a ABEC - 5 or ABEC - 7. I found these bearings at  for  (Grade 7 -$11.57 each) and (Grade 5 - $6.30 each). From what I have reviewed the bearing that Al incorporated had to have been a 5 or better or else the wobble would be in the order of 0.080". This as U know is an important issue with this device. If to much run out the rotor and Stator (AGW) coupling will degrade very very quickly as U are witnessing currently due to the pitching of the bearing. That said I would recommend to look at a better grade of bearing.

Thanks for the reply
Best Regards
Bill

[Omnibus]

@ClaNZeR,

Just to make it clear?the blue curve is the wind down curve with dampers while the red is without, correct? Is the lone stator latched in both cases? Also, is the hitch between 150 and 200 rpm always reproducible?

I should add, I think the effect is greater than the one shown because you have to shift the red curve slightly to the left. The two wind down curves have to start from the same rpm. It?s interesting that the effect (aside from the mentioned hitch) kicks in at about 400rpm which is about the rpm where the acceleration appears in the video.

Keep the good work, mate.

[Omnibus]

@Omnibus
What grade of bearing did u incorporated into your Stators? I recall u stated "R3", Was curious to what the runout is in the "Y" axis with the single bearing as per the Replication specification in your Rep.

Best Regards
Bill

Yes, indeed, the stator bearings are R3 unshielded. Don't understand what you want me to do. If you're curious about the wind down time, it's almost instantaneous. When spinning it by hand it makes 2-3 turns and stops. Let me know if you want me to try something else here.

Hello
No, No test requests from me, Sounds like the bearings are to loose (wobble). I found this with the R3 bearing. The R3 i believe is a ABEC - 1 grade (the lowest). I am switching to a ABEC - 5 or ABEC - 7. I found these bearings at  for  (Grade 7 -$11.57 each) and (Grade 5 - $6.30 each). From what I have reviewed the bearing that Al incorporated had to have been a 5 or better or else the wobble would be in the order of 0.080". This as U know is an important issue with this device. If to much run out the rotor and Stator (AGW) coupling will degrade very very quickly as U are witnessing currently due to the pitching of the bearing. That said I would recommend to look at a better grade of bearing.

Thanks for the reply
Best Regards
Bill

Indeed, the stator bearings wobble and I am concerned about it. Would be interesting to ask @alsetalokin about the importance of this wobble again. It seems he isn't too concerned about it. Nevertheless, will have to try it with a better grade bearings when the weaker rotor magnets arrive.

As for the AGW coupling, it seems that the wobbling doesn't matter. Once its latched it keeps going, that's what I'm observing so far.