Magnets, motion and measurement

[citfta]

Hi Guys,

Thanks for the nice comments.

Luman,  after reading your post I did try moving the shield magnet very slowly from between the opposing magnets.  And I did feel just the slightest bit of force at one point resisting the shield magnet from being removed.  At what I would consider normal speed of removing the shield I did not detect that.  I don't know if that can be removed completely by more careful adjustment or not.

telecom,  I do not have any way to measure the forces of movement right now.  I am going to be very busy for the next couple of weeks but when I can get back to this I will see what I can come up with to do that.  With these small ceramic magnets the forces will only be in ounces I am sure.  So it will take a small spring scale of some kind.

Later,
Carroll

[norman6538]

About measurement. I do not like  measuring instruments so I always use weights
times distance. I use washers or nuts so I can easily add or mix them.  I then drop the
ounces or pounds and call them units of work ie. 1 oz. x 1/8 in I call 1 unit of work etc.

My first OU
showed equal weights moving a greater distance giving 180% but this was not the
Floor setup. There is a little loss in inertia staring but if you use 2 weights. 1 to get
started and then caught by a floor and the other to carry through you can get an
accurate measurement.
Best of Luck. I expect my next device to be made and tested within a week.
We had International guests all this week.

Norman

[Floor]

Hi Carroll,
can you make some basic measurement of the forces x distance?
I like how you make them moving synchronously with the roller.

Hi Telecom

This video  https://www.dailymotion.com/video/x6gzr2q   doesn't give measurements,
but it does demonstrate the threshold sensitivity of the test bed shown (mine). 

From this video   https://www.dailymotion.com/video/x6va1an   ......
one can see that the force to install the sheild magnet is about as small as is
the lower limit of the test bed's sensitivity  (in the range of about 4 grams).

The output magnets can produce a force which is in this range (see the graph) below.

regards
floor

[Floor]

Also

The graph above is of the magnets, when facing each other on edge in repulsion.
Forces are MUCH  higher in direct pole to pole magnet orientations (Like CITFTA demo).

and for some reason the graph I just posted shows the force to distance
curve inversely ......  I just grabbed (semi randomly) a graph off my hard drive
(from the Twist drive topic).

So I hope you can see why it is that for all of the effort of doing measurements,
it seems a mute proposition to do so, once one has in hand experienced, the very large
difference between force needed to intsall or remove a shield and ...
the difference in the force between  the output magnets when a shield has been
removed or installed.   

    regards
           floor

[Floor]

           ALSO   ALSO

Thanks for the updates / videos Tinman

     @

https://www.youtube.com/watch?v=rRmbekUqJcs

and

https://www.youtube.com/watch?v=KhyfD1GiCXU

I think I see your design / intent,  good luck with it.

Note:  Undesired up and down forces (luc's force) will be high, especially with the leverage
factor present as the radius of the gears.

  floor