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Mag Lev Turntable

 
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AnalogRocks
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Joined: 08 Mar 2006
Posts: 25398
Location: Toronto, Ontario, Canada

TV/Projector: Sony 1252Q, AMPRO 4000G


PostLink    Posted: Wed Jan 16, 2019 12:45 am    Post subject: Mag Lev Turntable Reply with quote


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https://www.youtube.com/watch?v=JUlPN2A_r-g

https://www.maglevaudio.com/

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gjaky



Joined: 05 Jun 2010
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Location: Budapest, Hungary


PostLink    Posted: Wed Jan 16, 2019 8:05 am    Post subject: Reply with quote

Interesting, although the plate was waggling all the time, that is not so good...
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projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
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AnalogRocks
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PostLink    Posted: Wed Jan 16, 2019 8:39 am    Post subject: Reply with quote

gjaky wrote:
Interesting, although the plate was waggling all the time, that is not so good...


Yep I wonder if this is more proof of concept?

I'd like to see the laser reader at the smithsonian.

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gjaky



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PostLink    Posted: Wed Jan 16, 2019 10:12 am    Post subject: Reply with quote

It is interesting as a concept, but for sound this does not do much I think. Being mag lev makes the plate friction nonexistent, so eliminating the rumble of the plate bearing -which is good. But this is a direct drive plate after all, which on the other hand has some sort of unevenness in the angular velocity since the drive electronics have finite pole number -which is bad.
All the high-end turntables use heavy plates with belt drive to overcome the later problem. Manufacturer Clearaudio (and others probably too) has a good compromise, as they also using magnetically levitating plate, but they are still using a ceramic axle as a guide for the plate, so they can use belt drive. One can argue that the belt drive still cause friction even with the ceramic axle drive but then you can use multiple motors (symmetrically positioned) to even out the beltís side deflection force, or even better use magnetical coupling for the main plate underneath...

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projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
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