Bedini's Wooden Toys

[scotty1]

So I was right... now i need to know where to find certain wire lengths...usually i would look to the drawing for that...
No offence..but I work in the real world where every line and dimension has a proper function, and if it is not on my drawings then i will have to have the draftsman fix it.
I wouldn't sign my name to a model if the drawing i used was incomplete in every part.
That is my argument.
If you guy's think you can present all the correct information, why hasn't it been done?..It's not my fault...I will build you a motor with a lovely bronze cast base and flowers coming out...and forge its frame in the fire, but not with SOME of the information.
I believe it can be done..but it should be put together and presented  as a whole...free and fully functioning.
Scotty.

[Ren]

No offence....

None taken Scotty, and you have a very valid point. The thing is, it is one thing to build said machine and another to fully understand it. And if you are given plans for exact duplication, then that is all you get, and not an understanding of WHY it works. It may make no difference to some, the person who just wants to plug his device in and benefit from it without understanding why it works. I myself started out this way but I soon discovered that if I was to remain ignorant of the principles that I wouldnt get too far.

I wish there was a simple plan to follow in exactness, there are some pretty close ones however which leave only a little experimenting and tinkering to do (in regards to the window motor). The biggest issue is the tolerances and variables. Like your yoke you made above, if but one part is different then it affects the whole and other parts may need to be altered as well.

The simple SG monopole while seeming very basic has a number of variables which are often taken for granted. Take for instance coil shape, size, core material, number of winds (all of which effect the inductional properties and thus the functioning) etc. Most people dont take into consideration that the magnet may be one of the most important considerations, and that it is fairly difficult to measure many of the properties of the magnet itself, and whether it is a match in more than just size to its brethren on the rotor.

Perhaps more complete construction plans will be available at sometime, but they are only going to come out if the people who do their homework decide to share it with the world. If you have a genuine need to study and replicate the window motor then I can only offer you what I have found in regards to its finer points of construction, like window dimensions. Perhaps I can offer even more once I have studied it further.

Shan

[Pirate88179]

@ Ren:

Once again, I have a question for you.  I hope I have not asked too many.  As I mentioned, I am using a vcr hub for the Bedini motor replication. (Very good idea to encase the magnets like you did, high rpm makes for bad things if magnets fly off unexpectedly) Can this small motor work off of 9 volt rechargeable batteries?  Some say 6 volts ok, and others say it has to be at least 12.  My only thought for using the smaller batteries, beside the cost savings, is that it would shorten the time required to see what is actually going on with the system.  Instead of waiting hours to drain a car sized battery, I should be able to see results faster with the smaller bats IF you think they have enough juice to run the motor.

I thank you for sharing your knowledge.

Bill

[Ren]

Ask away mate There is no reason why it wont mate, given the correct resistance on the trigger winding. But you have to understand something about batteries.  For optimum life span the lead acid battery is recommended to be discharged at its C20. This means if it is a 20 amp hour battery it should be discharged at 1 amp over 20 hours. This wont change if you move to 9 volts or even to 24 volts. Nicads are a different story, but you should have extensive knowledge and strict safety precautions if these are used. You may find that at 24 volts your energizer draws 2 amps at its sweet spot thus a 40 amp hour battery would be needed to maintain C20.

My perspex rotor will run for a considerably long time off a disposable 9 volt if amp draw is set to 25ma. Then again, the amps can be set up to 250ma, and at this discharge pace it will most likely be dead flat after an hour. You may find that a smaller rotor is harder to start, and contains less weight and thus less inertia or flywheel effect. It should still run off 9 volts though. One of my small window motors ran off 2 volts. The air gap may need adjustments for low voltage as well.

I highly suggest joining the bedini monopole3 group to understand better the basic principles of the vanilla SG. Alot of people see it as an overunity device and are quickly discouraged when they realise it will not charge multiple batteries off one battery in its simplest form. In its simplest flavour it is only ever a unity or close to unity device depending upon its construction. The circuit has losses, the coil has resistance etc... The whole project is designed to show the principles and allow others to study the nature of both energy types and how they can be utilized. When someone has a much better understanding of these principles they can try different designs or experiment with their own.

Please dont be discouraged by that fact. It is not an overunity device, it is a teaching device, and you need to learn to walk before you fly