Ball bearing motor

Community General Discussions
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(Update II: New video, we managed to make it run on a standard racing pack 7.2V (no clue to how many amps - but not enough to kill a large elephant, only enough to melt wires slowly))

(Update: A SlowMo edit of the video, especially for "mogul" - that's lack of intelligence for you, frame by frame :D)

 

Original post:

 

A ball bearing motor needs a lot of amps.

We knew that.

We estimated that this one would do well with 10-15 amps.. But the LiPo battery I had around was a 6600 40C (Estimated 264 amps in the burst).. which turned steel into flying plasma.. a little faster than expected.

Note how close I am to severe burns - the table, floor etc got badly burnt - sometimes I am just lucky :)

https://www.youtube.com/watch?v=T7itGsWFoLI
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Wow, you were lucky not to

Wow, you were lucky not to get burned:-) 

But yeah, that’s the spirit, try everything to find out where the boundaries are :wink:

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Protection googles

I would advise using protection goggles whenever potential hazardous spinning objects are involved. :slight_smile:

But then again I see you like very much so being on the edge of danger… it’s just that eyeballs are so soft and fragile

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Your link works not Frits:

Your link works not Frits: http://en.wikipedia.org/wiki/Ball_bearing_motor

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:expressionless:

That was a really dangerous thing to do!

Lucky you didn’t get burned! :slight_smile:

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Huh? Firewall of China

Huh? Firewall of China again? it works from here - any one else having problems?

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Oh, sorry Markus,

Oh, sorry Markus, _that_link, not the other one - fixed now, thanks :slight_smile:

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Plasma

You took “operation on thermal means” very serious. Great so see the plasma - a very obvious sign of electricity.

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Kids, don’t try this at

Kids, don’t try this at home! Frits is a pro at this…sort of.

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I think somebody ought to

I think somebody ought to make a video like that about unicorns!

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lol, you looked like iron

lol, you looked like iron man discovering the first prototype of the arc reactor :stuck_out_tongue:

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Does a piece bounce off your leg?

Just love the reactions!

I’m sure this could be linked to lumi’s & MarkusB’s discussion on oddbots Robot A.I. blog regarding attraction and curiousity :wink:

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@SkeptiKal: Yep, that would

@SkeptiKal: Yep, that would be a definition :slight_smile:

@Bajdi: well, as you can see, Frits used the metal axle as a fuse to protect the LiPo :slight_smile: So the PiPo was never in danger to catch fire

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"Does a piece bounce off

"Does a piece bounce off your leg?" That’s what we thought when looking as well.

But we only found a small piece of metal on the table - smaller than it appears on the video, very light. And nothing else, puff!

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Nice Video :slight_smile:

Nice Video :slight_smile:

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Re: new video.

It would seem current control would be a good thing. Maybe these motors have similar characteristics to steppers, in that they only deal with a constant current, but, can handle many multiples of their stated voltage? For instance, steppers for hobby CNC machine usage are often times run at 10x and sometimes up to 15x their stated voltage, but, the current is judiciously controlled by the driver.

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This is not a motor in the

This is not a motor in the normal understanding. There’s just two ball bearings, common axle, and a short circuit. No magnets, no detected magnet field other than from the wire, no coils. Just a short circuit on wheels. And that short circuit needs to be heavy on amp. It can run either way, but needs a high speed to get started accelerating.