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Author Topic: Magnetic Engine Video  (Read 55188 times)

vineet_kiran

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Re: Magnetic Engine Video
« Reply #45 on: March 26, 2015, 02:34:23 AM »
I have magnets - enough of them. Many 25mm diameter 6mm thick neodymium. I will use a couple of those.

Here is some of the neos I have:

 
Those magnets are useless for this experiment.  You should have a magnet as seen in the picture.
 

vineet_kiran

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Re: Magnetic Engine Video
« Reply #46 on: March 26, 2015, 02:45:36 AM »
I got the picture from here :
http://www.waynesthisandthat.com/magneticguns.html
 
 

Don't know if these magnets have poles on faces.
http://www.mscdirect.com/product/details/06586531

vineet_kiran

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Re: Magnetic Engine Video
« Reply #47 on: March 26, 2015, 03:03:24 AM »
 
Direction of flux is shown wrongly in the picture shown above.  Actually flux crossover the breadth, not length just as in the case of a speaker magnets  which I have used in my experiment.
 
 
 
 

Floor

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Re: Magnetic Engine Video
« Reply #48 on: March 26, 2015, 05:38:37 AM »
@Vineet_Kiran

Thanks for the experiment and video.
I have presented a similar idea  under the topic name  of “mag mirror engine”.
in the mechanic section of the forum.
But I have not done the actual experiment or measurements.

Your description and video make clear enough the arrangement you are using
and your explanation is also accurate.  Please keep it in mind that some are here
only to detract, misdirection, and distort.   keep your head clear and your heart
strong.  Thanks again .

                                     floor

Low-Q

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Re: Magnetic Engine Video
« Reply #49 on: March 26, 2015, 06:30:30 AM »


Those magnets are useless for this experiment.  You should have a magnet as seen in the picture.
It does not really matter what kind of magnet shape you got. However, if you see the picture I posted there is a stack of long flat magnets there too. I can use those.
The magnets you used in your pendulum experiment, how was they looking? Not like the picture you posted.
I am going to make a simple device that is sliding in and dropping a long steel bar or similar between two magnets.

Anyways, my drop cam was finished this night.

Vidar

vineet_kiran

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Re: Magnetic Engine Video
« Reply #50 on: March 26, 2015, 09:50:28 AM »
@floor,
 
Thanks for your support.

What I feel is our knowledge about magnets, magnetism and magnetic field is very much limited and if we go on experimenting with magnets we may find lots of new strange things.
 
I have seen your mirrror mag engine. It is a nice work. We have to build it and verify.

 

vineet_kiran

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Re: Magnetic Engine Video
« Reply #51 on: March 26, 2015, 09:52:21 AM »
@Vidar,

I appreciate your interest and sincerity in work.  Wish you good luck!

May I know on what basis you have designed that drop cam?  The 90 degree fall in that cam should correspond to height of fall of the shield.  If not magnet will not be exposed and you will not get required repelling force.  Circumference of the cam should be corresponding to complete movement of pendulum or piston in one cycle and shield should fall when piston / pendulum comes closer to the fixed magnet at desired position.

Have you considered all these things?
 
 
 

 

MarkE

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Re: Magnetic Engine Video
« Reply #52 on: March 26, 2015, 10:08:50 AM »
@floor,
 
Thanks for your support.

What I feel is our knowledge about magnets, magnetism and magnetic field is very much limited and if we go on experimenting with magnets we may find lots of new strange things.
 
I have seen your mirrror mag engine. It is a nice work. We have to build it and verify.
Feelings do not evidence make.  Actual reliable data that contradicts predictions based on current understanding is required to show defects in current understanding which can then lead to improved understanding.

Low-Q

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Re: Magnetic Engine Video
« Reply #53 on: March 26, 2015, 02:08:11 PM »
@Vidar,

I appreciate your interest and sincerity in work.  Wish you good luck!

May I know on what basis you have designed that drop cam?  The 90 degree fall in that cam should correspond to height of fall of the shield.  If not magnet will not be exposed and you will not get required repelling force.  Circumference of the cam should be corresponding to complete movement of pendulum or piston in one cycle and shield should fall when piston / pendulum comes closer to the fixed magnet at desired position.

Have you considered all these things?
My 3D printer isn't so big, so I must use smaller magnets. A coulpe of those small round ones in my "magnet picture".
The fall is not more than 50mm.
I also think the cam will result in great friction and inaccurate lifting process. I will make a try. If I cant continue due to many obstacles I have to think new. I wont spend weeks to complete this experiment.
I use Google Sketchup to make the model. Then convert it into a STL-file that I import in to Slicer software. In that software I set PLA temp, bed temp, layer hight, infill properties etc. Then I save it as a gcode-file the Arduino printer understands. The actual printing process is sent by Pronterface software.


I already know the outcome if the mechanical is a success (It will never be over unity - even without friction), but I build it for educational purpose only.

Vidar

Floor

  • Guest
Re: Magnetic Engine Video
« Reply #54 on: March 26, 2015, 03:48:41 PM »
@Vineet_kiran

I am happy to see the possible improvement your concept represents,
over my design, in that the shield is not completely withdrawn from between
the magnets.

I am attaching two drawings or interpretations of your device.
Please let me know if I have understood your set up correctly.

                best wishes
                       floor

DreamThinkBuild

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Re: Magnetic Engine Video
« Reply #55 on: March 26, 2015, 03:54:38 PM »
Hi Vineet_kiran,

Just from doing some simple tests the thinner the magnets, the less friction and actuation distant the shield has to move.

Attached is a picture of an alternative idea of using a sliding switch with shields that are lifted by the ramps when the magnet hits it. The goal is to temporarily lock the open state so it isn't coupled with the driving magnet.

A hair trigger snap action toggle switch may also be tried but adds complications with increased complexity and wear.

This design may still stick on the end cycle between the switch but may inspire some new ideas.

vineet_kiran

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  • Posts: 382
Re: Magnetic Engine Video
« Reply #56 on: March 26, 2015, 05:23:50 PM »
My 3D printer isn't so big, so I must use smaller magnets. A coulpe of those small round ones in my "magnet picture".
The fall is not more than 50mm.
I also think the cam will result in great friction and inaccurate lifting process. I will make a try. If I cant continue due to many obstacles I have to think new. I wont spend weeks to complete this experiment.

I already know the outcome if the mechanical is a success (It will never be over unity - even without friction), but I build it for educational purpose only.

Vidar

 
Mr.Vidar,
 
 
Please don't spoil your 3D printer.  Here is a simple method to verify it. Please see the attachment.

vineet_kiran

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  • Posts: 382
Re: Magnetic Engine Video
« Reply #57 on: March 26, 2015, 05:35:45 PM »
@Vineet_kiran

I am attaching two drawings or interpretations of your device.
Please let me know if I have understood your set up correctly.

                best wishes
                       floor

 
It is exactly right.  You have to move the shield completely inbetween the magnets to get maximum repulsion.   But it (part of the shield )has to be on the surface of fixed, strong, lengthy magnet.  If you try to take the shield out of strong magnet it experiences dragging force.
 
 

MarkE

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Re: Magnetic Engine Video
« Reply #58 on: March 26, 2015, 06:25:20 PM »

 
Mr.Vidar,
 
 
Please don't spoil your 3D printer.  Here is a simple method to verify it. Please see the attachment.
Your equations are wrong.  The energy loss for the shield is the (W1 + the shield weight) * H1.  The energy gain for the pendulum depends on the dimensions of W3, W2 and the pendulum arm and the weight of each.  It is not H2 * (W2 +  3*W3).

vineet_kiran

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  • Posts: 382
Re: Magnetic Engine Video
« Reply #59 on: March 26, 2015, 06:27:44 PM »
Hi Vineet_kiran,

Just from doing some simple tests the thinner the magnets, the less friction and actuation distant the shield has to move.

Attached is a picture of an alternative idea of using a sliding switch with shields that are lifted by the ramps when the magnet hits it. The goal is to temporarily lock the open state so it isn't coupled with the driving magnet.

A hair trigger snap action toggle switch may also be tried but adds complications with increased complexity and wear.

This design may still stick on the end cycle between the switch but may inspire some new ideas.

@Dream Think Build

Very nice imagination.  But how will you hold the shield?  Shield will be experiencing attractive force from the magnet (left or right) and if you try to contain the shield within a box or channel, it experiences tremendous frictional force while moving up.  That is the reason why I thought of moving the shield on the surface of magnet itself,  using a ball so that friction will be less due to  point contact even under tremendous attraction between shield and magnet.