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Forum Index : Electronics : Old F&P rotor types -differences?
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| domwild Guru  Joined: 16/12/2005 Location: AustraliaPosts: 873 |
Hi, Just cleaning out the garage and looking at my collection of old rotors. Am finding two types: The ones with larger magnets and fewer of them (obvious!) and the other type with smaller magnets. Questions: Is one type better than the other one? Smoother waveform with more magnets? Thanks. Taxation as a means of achieving prosperity is like a man standing inside a bucket trying to lift himself up. Winston Churchill |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5078 |
I have a suspicion the old rotors with the individual magnets are slightly stronger than the newer rotors with the four magnets combined into one block. I do remember hearing something about F&P going for the combined magnet because it made less of the whine noise on the spin cycle, but I could be totally wrong. I do have some of the old and newer hubs in boxes in storage, I should use my gauss meter ( shameless plug intended ) and measure the magnet strength of the different types. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| domwild Guru Joined: 16/12/2005 Location: AustraliaPosts: 873 |
Thanks, Glenn. Taxation as a means of achieving prosperity is like a man standing inside a bucket trying to lift himself up. Winston Churchill |
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Bryan1 Guru Joined: 22/02/2006 Location: AustraliaPosts: 1344 |
G'day Glenn, Good idea to use the ugn3503 as a gauss meter, I made a simple circuit using one of them years ago for testing N-S poles. All I used was a nimh battery I got from oatleys a green led and resistor and the hall effect sensor. With putting the poles in on my 4kw motor conversion I didn't need that circuit as the strength of the magnets told me if I got the poles right. Once I got all 21 magnets in one pole I couldn't get the opposing pole within 2" of it. I did find out the hard way when one get the pole wrong a split magnet and luckily none in my finger. Cheers Bryan |
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