2, 088,600 RPM, 34,810 rev per sec, 733mph, and 7.3 million G's :yodel:

https://youtu.be/beH0OgSpcYo

I edited my first post.

laugh of loud.  and i thought namirha's thread was good.

do you like the star wars dremel . reminds me of a magnetic bearing.

https://www.youtube.com/watch?v=zQ23j1hB-1o

That is very cool, thanks for sharing. I have 6 dremel tools, mostly bought at garage sales, always in better condition (mainly front bearing) than my last. Very convenient to spin a object in one dremel and use a second one to do the work (cut/grind/polish), works great.

I bought some 20mm balls (not here yet), they were cheap at $2 for 2 shipped. https://www.ebay.com/itm/2-x-20mm-Diameter-Black-Magnetic-Round-Ball-Hematite-Singing-Magnets-Black/173665700036?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649

I am going to play very safe with them. :deathstar: :cleaning:
When I got the 3mm balls, I thought they were 2mm because looking at 5mm for so long, the 3mm is tiny, but its the volume that is so different, volume of each ball
3mm=14
5mm=65
20mm=4128 :scared: :hehhee:

FYI, I have used banggood, ebay, digikey, for a long time. I recently was looking for a better hall sensor just to mess with, ebay wanted too much (its not a popular model), digikey cost too much and had a 8 week lead time, then I found Arrow electronics, wow, 5 hall sensors for $6.50 shipped, and they take paypal, win win.
https://www.arrow.com/?utm_currency=USD&gclid=CjwKCAjwza_mBRBTEiwASDWVvn7JAX3Ss14zFHfZFdukknJYXbpmdaSw6aVUWRfen-ONUScMjZZBdhoC33EQAvD_BwE

Hope you know what you're doing Oz.
A 20mm steel ball makes for quite the projectile if it goes off a tangent while spinning at, well not quite but on it's way to atleast, relativistic speeds :fear:
Play it safe, that's all I'm saying.

somehow high speed is more exciting than free energy, - go figure !.   

you know if i wasnt creaming myself enough over this experiment, -  how about a pickup coil placed over it @ relativistic speeds - with a length of resistive wire as the load..

I liked the size of the 5mm magnet ball, was easy to control compared to the 3mm, but they just let go at ~1.1Mrpm. I wished it was stronger tensile strength like steel is, then could get higher rpm's. But steel is not a magnet so will not work. Then I came up with this idea, EDM drill a hole in a steel ball bearing and glue in a cylinder magnet. This needs to be done correctly to work (good fit and correct glue). If you ever tried to drill though hardened anything, its a nightmare, now try it though a hardened ball, almost impossible, but check out this video, the thumbnail alone is amazing.

https://www.youtube.com/watch?v=rpHYBz7ToII&t=6s

Let me say it again, with my experience seeing plenty of 5mm ball explode and the energy they have, then going to 3mm balls and seeing the energy difference, also looking at the volume difference (20mm has 63x more volume than the 5mm ball), that 20mm ball is going to be handled in very careful manor (semi remote controlled), just like a redheaded step child. :hide: :fear:

One of my weak points of this project is ball containment, I need to up my game in that department, I have a few ideas, any suggestions are welcome.

Check out this find, 50x50x25mm N52 High Quality Rare Earth Magnet Neodymium, seems like a bargain at $7, urging myself to find a application, lol
https://www.ebay.com/itm/1pc-Block-50x50x25mm-SUPER-STRONG-N52-High-Quality-Rare-Earth-Magnet-Neodymium/223459995744?_trkparms=aid%3D111001%26algo%3DREC.SEED%26ao%3D1%26asc%3D20160908105057%26meid%3Dd17815cd14a248b58e8d07389968243f%26pid%3D100675%26rk%3D1%26rkt%3D15%26sd%3D223459995744%26itm%3D223459995744&_trksid=p2481888.c100675.m4236&_trkparms=pageci%3A3bedbbf5-6e9c-11e9-8207-74dbd1800607%7Cparentrq%3A8426b78f16a0ab1d0a136c53fff0c28b%7Ciid%3A1

Quote from patrick1 on May 4th, 2019, 02:09 AM

somehow high speed is more exciting than free energy, - go figure !.

I love racing, power is nothing without control (lol, 1970's Pirelli commercial). From slot cars for 15 years, rc on-road cars for two decades (12th in the 1996 world champions), and pc sim online racing for a decade. My slot cars got a speed increase from 12v to 40v and a modified gun. The online racing was great, I got tired of the failing pots in the pedals and wheel, so I made my own wheel/pedals with hall sensors and a 12bit resolution controller (from 8bit), night and day. I mostly play with quad copters now (drones), zero to 13 G's in 1.2 seconds, 0 to 84mph in 1.5 seconds, total freedom over planes, any direction anytime, check out my video in my link at the bottom.

Quote from patrick1 on May 4th, 2019, 02:09 AM

you know if i wasnt creaming myself enough over this experiment, -  how about a pickup coil placed over it @ relativistic speeds - with a length of resistive wire as the load..

If you look at how a efficient transformer is made (tight winding around excellent magnetic material core - like in one of your videos), my spinning ball is far from anything efficient. :hillbilly: Large air gap, coil barely coming near the ball. My 3mm ball at 2Mrpm, I was burning ~70W. :laughing:

Last night I came up with a neat idea to try. It involves a aluminum tube. :yoda:
I really wish I new how to program, I have so many ideas I would like to try.

And last, have you herd of Halo Drive, pretty wild stuff. Many videos on this subject, here is one of them.

https://www.youtube.com/watch?v=rFqL9CkNxXw&t=640s

wow 12'th in a world title race, pretty awesome experience. 

great job,

im still racking my mind btw, but i think, in relation too my high rpm coil idea,   you machine reminds me now of an epic flywheel, -   technically i think, you can store, WAY MORE power than a capacitor, and disscharge it almost as fast, -        imagine spinning a 1inch ball up and what it could be used for... laughs, too early in the morning here... - perhaps magnetizing  ....   anyways  good luck moving up too RF transistors, and silicone filled basketballs, -     -- just quietly , i hope you take it a few steps further ;-D

Thanks.
About 6 years ago I made this spinning top, I can spin it up with the brushless 1200kv motor, then pop the motor stator off. With 12V input and half thro, it spins for 65 minutes. Its a SS ring I found that is 10" diameter and 910g. I have only spooled it up to half throttle,,, well because it looks like if something went wrong, it would rip you a new one. :rtard:

crikey now thats a spoon !!

makes me want too laser cut one,  my local shop will cut 2.5 - 3mtr diameter, and they have 1foot thick steel sheets in stock. lol L L L L L L L L  lots of them

decandillo steel in perth, - they are cheap too, - they did cad work for some 2" sprockets for me,, in 2mm thick, and printed 10 of them for a total of $40. ouch.

5-8-2019 Upped it a bit today, another 144,000rpm and +1 mil G's:
2,232,000, 37,200 revs per sec, 784mph and 8.3 million G's
More importantly I learned a few things that I need to think about how to solve, one should be obvious in the 2.23 mil picture. The other is more important.

Learning from yesterday and from testing today I got to:
3,176,400 RPM - 52940 RPS - 1116MPH - 1796KPH - 16.9M G's
I am burning ~125W, turning a tiny 3mm ball, about as efficient as a Cadillac, lol. New ideas has come from todays experiments.

I was wondering why I get a flash when the ball sheds its skin or just plain disintegrates.
My theory is the shell is made of copper and nickel, both good conductors.When they depart from the magnet, the magnet is still spinning and generating voltage in the shell fragments, and if the shell creates a short, it might give off a flash of light, like a short circuit can. Plausible, thoughts, ideas?

Maybe a plasma forms which at the moment of overarching shorts some electromagnetic energy inherent in the ball, making it...……..disintegrate :deathstar:
Careful you must be, or disappear you could :myoda:

The more and more I experiment with 3mm balls, almost all flash or some throw sparks when she lets go. Would be nice to see it in a clear container and in slow mo.

Maybe it will look something like this,
 

:-D








:hide:

Cool, what is that a picture of?

Simulation of a black hole exploding.
If you find that everyones clocks in the entire World seems to have somehow shifted forward in time by a few seconds compared to your own clock after the ball has exploded then maybe you should consider keeping a healthy distance from that spinning ball, especially when it :deathstar:

Today I blew three IRFZ46N FET's, These are salvaged out of a UPS unit. I been turning up the coil voltage to 20V and C.C limit to 10A. I have seen the coil CEMF fly up to ~80V, fet rating is 55V. I am going to try adding a 15V zener to the gate I have laying around. Thinking of adding a snubber across the coil (RC, or polarized RC-D) .

I been playing with coils too, 1 mil was wrapped around a pill bottle, then I tried a smaller coil and got to 2 mil (many other things also changed), for 3 mil I used the same diam coil but halved the turns, but used bi-filer (two wires parallel), and a couple other changes. I think its time to try a lower inductance coil (current will ramp up quicker) and flyback less and maybe would not kill the fets I currently have. I am seeing peak currents of ~40A,

I did not have time to try fet protection, so I blew another fet today, it also took out the 3906 npn bottom totem pole fet driver, replaced the fet but not the 3906 (I didn't know at that moment). I quickly noticed the coil current (green trace) was weird. After fixing it, I turned up the gate voltage from 5 to 10V, then I seen some 93Apk 51Arms coil current at only 1 mill rpm (2.8A/us rise time, lower inductance please)), LOL. Your going efficient, i am going for ozone hole above me. :pirate:

3,348,000 RPM, 55,800 rev per sec, 1176mph, 1893kph, 18.8M G's today.

My 20mm big balls came in today. :nuke: I will go full safety with these suckers, they are only 296 times to volume of the 3mm balls, lol!

Best sparks, would that be at the time for ball disintegration?

Yep, spontaneously disassembles itself. :)
The bottom standoff is the one that the sparks came from, the top one half the ball is missing, the other half is chum.

Off topic: Second picture I changed components to tune channel #1, we running at 56 Gbaud per channel (601,295,421,44 per second, per channel, or 7Gbytes a second per channel), there is 4 channels at this speed, for a combined 224 Gbaud. If your familiar with the smaller smt resistors/capacitors, 0402 is kinda small, then there is 0201, here I am using 01005, see bottom of picture, I placed a 0402 next to a 01005 part.