Turnable database with TimeLine

HF Dover

You appear to have invented a whole new type of motor. One where the rotor follows the rotating field with zero phase lag.
Please explain to us all how such a motor produces any torque.
Also one which "Instantly" draws more current and supplies more torque.
Please explain to us how it senses the need for more torque.

Caution needs to be exercised when quoting manufacturers advertisements.

Regarding the eddy current brake as used in the Beat TT
Go to teresaudio.com and follow the link...micro precise speed technology.
The Certus motor.
As I said earlier, this is an elegant design.

"The Beat [like every other direct-drive turntable] has only one moving part, the bearing." The ad copy is correct; however the inference that this quality is exclusive to the Beat is exaggerated, to say the least. But I really really like the Beat. I think it may be the best buy in high end turntables, if $24K is a "buy", but I can live without the hype.

I think I mentioned this above; the Denon DP80 and other models use a genuine 3-phase AC synch motor. But they also built in quartz-referenced servo control. The servo can be defeated on the front panel. It would be interesting to compare its performance with vs without the servo engaged, but you might fairly say that the platter is not massive enough to give the momentum needed for the a non-servo dd to perform really well, even with an AC synch motor.

But isn't the argument that a massive platter and no servo is superior to a lower inertia platter WITH servo just an analog of an old argument among belt-drive aficionados, where the two sides argue over massive platter/weak motor vs lighter platter/torque-y motor? The more things change, the more they stay the same. Massive platters tend to "spread out" any speed error over time. Those who like them say that this is good. Those who don't don't.

And now we have "Mag-drive", because the buying public have been taught for 30 years that direct-drive is a dirty word.

01-05-14: Richardkrebs
Regarding the eddy current brake as used in the Beat TT

Please quote the authority to substantiate your assertion that the Beat uses an eddy brake ?

01-05-14: Richardkrebs
Regarding the eddy current brake as used in the Beat TT
Go to teresaudio.com and follow the link...micro precise speed technology.
The Certus motor.
As I said earlier, this is an elegant design.

You have incorrectly claimed that the Beat uses phase lag to pre load the motor.

01-04-14: Richardkrebs
The Beat appears to uses electromagnetic drag to "pre load" the motor. Moving the rotor back in phase relative to the rotating field.

The Certus does not preload the motor using phase lag as you incorrectly claimed in your post re the Beat TT.
The white paper you refer to confirms my comments that the motor is preloaded from additional drag provided by the eddy brake, not the phase lag as you have claimed.