[George's Pro Sound Company]

"Scott Dorsey" wrote in message
...
George's Pro Sound Company wrote:

but if the magnets vibrate would not the change in flux vector cause a
vibration in the suspended object

Yup! Magnetic suspension is hard to make work properly.... you need to
have
a constant flux over a wide area so that if the base vibrates, the field
at the plinth magnets doesn't change much if at all. You can make it
work
but it's hard to make it as effective as cheaper alternatives.

On the other hand, those cheaper alternatives ALSO require some careful
engineering and they don't always get it. I can think of a mastering
house
in NYC that was having trouble with building vibration from the subway and
installed a fancy isolated platform whose suspension had a resonance
around
0.5 Hz which would get excited into wild motion by the subway....
--scott
--
at one time I sold Camera that were mounted to electron scanning
microscopes
one I personal was involved with was the on in the botony building at
cornell university
the professors there told me that a bus driving 1/4 mile away cause so much
vibration to render the microscope useless
so the scope was mounted to a 12 foot by 12 foot 25 foot deep slab of
reinforced concrete
I sure there were more details about suspension and stuff but this is what
it takes to eliminate common vibrations from devices