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quote:Originally posted by daveshortsUnfortunately someone a while ago (I think he was called Ehrenfest but I may be wrong) worked out that there is no configuration of permenant magnets that is stable basically the problem with your experiment is that if the small magnet moves slightly closer to magnet A, the pull from magnet A gets bigger, and the opposite pull from magnet B gets weaker so it keeps moving towards magnet A - it is a bit like trying to balance 2 balls on top of each other.It is possible to make it work if on eof the magnts is spining as the gyroscopic effect stops the magnet rotating which is a failiure mode.The thing you have seen on the web is using a piece of graphite which isn't a magnet it is a diamagnet - these repell magnets so you can actually make a stable system.
quote:Originally posted by DoctorBeaver If the object you're suspending moves in a given direction the computer senses it and adjusts the current to the magnets accordingly. I'm sure that if you paid me untold sums of money I could develop the system for you! heh