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The OC Magnetic Perpetual Motion Machine Replication (WhipMag)
Now for the Replication!
With the Base I decided to go
with adjustable Slots for the Stator Magnets and
adjustable slots for the Dampners.
To cut my losses I have gone for top and bottom RC bearings.
The finished base is below.
Right first thing now the base was finished was to get the RC 3mm Internal
Diameter
Bearings fitted and the lathe down a Brass shaft.
As you can see the height is 30mm and the Brass shaft fits perfect.
Here is the finished Rotor by the way!
Next is to Press Fit the Brass Shaft into the Rotor, I used a Drill Press stand to achieve this.
Finally Pop the Rotor into the bearings and screw it up.
Really please with this Rig as really loose using the 3mm RC bearings.
Now I have just got to wait for the magnets to arrive. I have some 1/4 *1/4 *1/4
Cubes knocking around but not enough, so have ordered some of these as well.
09/01/2008
The 1/4 *1/4 *1/4 Cubes turned up, so have mounted in the Rotor.
Now waiting for the Stator Magnets to arrive.
Played with a few ideas for the stator magnet mounts because
I want them to be movable.
This seems to be the best design I can think of:
I went for a 6mm Rod lathed down to 3mm with a lip to space it slightly off the
top of the bearing.
Press Fitted the 6mm end into a bit of 16mm Polycarbonate Rod. Will use a little
bit of glue too seal it.
Tapped a 3mm thread on the end.
Mounted the 6mm OD and 3mm ID Flange bearings either side of
the holder.
Press fitted the Brass rod inside the bearings by doing the nut up tight and
then removing it.
The block is held in place and can be slid back and forth.
I should now be able to lathe out the 16mm Rod to press fit the 12.7mm Stator Magnets.
Meanwhile quick video to show how loose the Stator bearings
are using one of the small Stator Magnets.
If you are not using IE you will not be able to see the video box above, so
please
click on link below to download.
10/01/2008
Two pictures below showing the Dampners that I lathed down to
12.7mm * 6.4 depth.
I will adjust the height of the Dampners and the Rotor to suit the Stator
magnets when ready to go!
The second pictures show the positions of all 3 of the Stator Magnets now. Will need to replace the Polycarbonate dummy's for the real; stator magnets when they arrive.
11/01/2008
While waiting I thought I would get my second Rotor done.
Struggled to source 1/4 * 3/4 Rod magnets
but managed to get some 5mm * 20mm.
So second Rotor below with rod magnets.
13/01/2008
The Original Rotor was 20mm so I will also be testing a 20mm Rotor out of Polycarbonate and HDPE.
Rotor1 is 8mm thick so by adding 6mm dummies top and bottom I get 20mm as pictures below:
Weight of Rotor with Brass Axle with magnets= 430 grams
15/01/2008
The HDPE 20mm Sheet and Rod arrived today, so have knocked up
a Rotor and some new Stator holders:
First I cut the Rod into 16mm lengths.
Then I drilled them out with 6mm all the way through and
12.5mm 6mm deep.
Magnets fitted nice and snug.
Bearings again fitted great.
Next I lathed some 8mm Brass Rods for the shafts.
I threaded the bottoms of the shafts so they can mount on my
base using 3mm brass screws.
Next I cut out the 20mm Rotor and weighed it up.
Rotor fitted and Stators all in place.
I am waiting now for some 6mm * 13mm Rod magnets to arrive,
but may try the Cubes again, but this time only using 2 on each edge rather than
3.
17/01/2008
Now the Rod Magnets have arrived.
A couple of different bearing designs were used. The Blu-Tac was to just add weight.
For testing a Tacho is attached to the base:
Also for wind down tests I have built one to AL's original measurements:
More to come.............
PLEASE NOTE.
Sorry I am not posting the results of my experiments as
this would take too much time.
But when I have something I can shout about and that works 100%, then be assured
I will post an update.
For now this is just a Blog as such of what I am working on.