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In Reply to: RE: Floating turntable - coming soon! posted by bquisp on February 17, 2021 at 16:13:54
found on the Clearaudio Statement works well enough - and doesn't wobble! The lower platter is belt driven but does not touch the upper one.
I'm been mightily impressed the times I heard it.
If you think about it, all DD turntables are "magnetic drive". Another case of hype.
All of a DD motor's vibration is communicated directly to the platter to which it is rigidly attached.
With the Clearaudio, however, the connection between the lower and upper platters is contact-free like the levitation turntables.
Only the magnetic force between a gap of air rotates the upper platter where the disc lives.
Here's the thing with that: It's a drive system with a lot of compliance. I had totally forgotten the mechanism, so thanks for correcting me. I hadn't thought about that Clearaudio design in ages.
On the other hand, we could agree to disagree about "vibration" in a conventional DD motor. Since the platter rides on a bearing, just as for any other drive system, and since nothing else contacts the platter or the spindle shaft except the bearing well, I don't see a major pathway for vibration that is unique to DD. Nor do I see much of a cause for vibration, except that the stator needs to be very stable so as to resist twisting in a direction opposite to that of the platter (rotor), when torque is applied, for minimum compliance.
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