I built a magnetic levitation stand twenty five years ago. It’s the same idea used in the Verdier turntable to “float” the heavy platter. And similar to the air bearing platters and air bearing tonearms. The general issue with mag lev is that the sideways forces of the opposing magnets are very strong, such that the top plate always ends up pushed against the part of the structure, e.g., the column, that stops the top plate from flying off the stand.
This also prevents the top plate from moving freely in the horizontal plane, I.e., no isolation in the horizontal plane. Also, not good for isolation in the twist rotational direction.
So the top plate is not totally able to float and a transmission path is formed between the bottom part of the stand and the top plate allowing vibration to travel up to the top plate. The magnets themselves do not make contact if you do it right. A better solution to the problem overall is a combination of springs and roller bearing assemblies, as has been discussed many times, which can provide isolation in most or all of the six directions of interest, if you do it right.
This also prevents the top plate from moving freely in the horizontal plane, I.e., no isolation in the horizontal plane. Also, not good for isolation in the twist rotational direction.
So the top plate is not totally able to float and a transmission path is formed between the bottom part of the stand and the top plate allowing vibration to travel up to the top plate. The magnets themselves do not make contact if you do it right. A better solution to the problem overall is a combination of springs and roller bearing assemblies, as has been discussed many times, which can provide isolation in most or all of the six directions of interest, if you do it right.