2020 update : JC Verdier La Platine

@lbelchev Regarding the 'braking' action,  Let me rephrase so that I understand correctly. The 'brake' is provided by the viscosity of the oil acting between the axle and the bearing. As there is no vertical force acting on the plinth from the heavy platter due to the replusing magnets, the viscosity of the oil acts as a correcting lateral force to stylus drag. If this is the correct understanding of the 'braking' action then it may explain the drift in playback that I had heard. You see, I had thought the oil as merely a lubricant, so before reading the documents on braking, I had not bothered to replenish the oil reserve. Big mistake!

You mentioned the CS Port LFT1 where the platter floats on air rather than magnets. And it also uses a low inertia motor like the La Platine. The specification given for motor speed accuracy is +- 0.3%. That's between 33.3999 and 33.200, certainly not 33.333333. And that would be the point raised by you and Chris, no need to sweat over 'absolute' speed accuracy. Well taken.

I do have a few questions:

1. The CS Port LFT1 looks like a non-suspension plinth design, with a very heavy slate plinth. The actual resonance control is taken up by the air bearing, whereas the La Platine uses pneumatic footers. If as suggested by @lewm we defeat the pneumatic footers with solid blocks, then there would be no resonance controlling mechanism in the La Platine, as the magnets will not be serving that function. would that be correct?

2. Do you think the use of a low inertia motor only works with a design that decouples the platter from the plinth, either through air or magnets?

3. The CS Port LFT1 is a low flow low pressure design in both its LT arm and platter. Well, the Terminator LT arm on my La Platine is also low flow low pressure. Does that mean I have a poor man's LFT1? He He!

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1. The CS Port LFT1 looks like a non-suspension plinth design, with a very heavy slate plinth. The actual resonance control is taken up by the air bearing, whereas the La Platine uses pneumatic footers. If as suggested by @lewm we defeat the pneumatic footers with solid blocks, then there would be no resonance controlling mechanism in the La Platine, as the magnets will not be serving that function. would that be correct?

Albert
Your statement is half right as it pertains to the Granito La Platine model. On the Granito model the resonance control is performed by a combination of the plinth and the pneumatic footers.

"Granito is a material composed by little pieces of marble becoming from different origin agglomerated inside a mold with cement.
And of course machined and polished to obtain a good looking result. The resonance of the plinth with its suspension is about 5Hz and it is well absorbed by the air cavities." JC Verdier

"Anyone", that suggests removing the footers and or changing out the Granito plinth - has not come to understand the design, concept, and execution of what is at play.

Furthermore.

The Granito version was very expensive to make. The story is on the Verdier website, and eventually led to the current modern day black glossy plinth. I have an email somewhere from JC Verdier on how a secondary Granito limited run was done at one time for the Japanese market, due to demand.

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Re: Platter System Braking Behavior

Unlike any platter systems that I used to be familiar with, in that they were ....free spinning. This platter system has what I would call, a form of active management.

"The same pole magnets play a part in providing braking action to deal with the records behavior." - JC Verdier.

Albert
With your turntable at speed and no record playing. Turn off the motor. Count the seconds for the platter to come to a complete stop.
Now repeat, and this time just cut the thread. The braking behavior will reveal itself to you.
One comes to realize with this experiment the marriage of the Verdier Motor and Platter System, and how foolish it is to split them up.

Albert, my two cents about La Platine speed stability:

1. Check the axle adjustment. If you use a steel ball check the resistance point between the ball and the spindle. The steel ball should be in contact with the spindle, almost but without pressure. If you do not use a steel ball, the axle should not be in contact with the spindle.  In this case just catch the resistance point and than slightly return back the axle via the adjustment screw. Therefore some play will be necessary (60 to 80th of an inch is sufficient) .The still ball is not absolutely necessary. You can chose to remove it if you want and it is not necessary in such case to modify the adjustment of the axle. If you want to change the mat and/or record clamp it is necessary to adjust the axle.

2. "One of the Verdier’s little foibles: the bottom of the main bearing is designed to leak oil! With an inverted bearing, gravity causes lubricating oil to flow to the bottom of the shaft, leaving the top part dry. Over tune, this oil will eventually make its way to the bottom of the axle where it collects in the axle base cup... If all this conjures up visions of getting out dip-sticks to check oil levels before going for a spin, don’t worry. The oil reservoir is generous, and the rate of seepage low. Also, as the oil is thick, it tends to cling to the sides of the bearing. All the same, this turntable needs rather more maintenance than your average deck..." James M Hughes, "HI-FI NEWS - February 1999"
So, every few weeks 0.5-1.0 cc of oil should be added to the reservoir next to the spindle to keep the axle lubricated. Use the supplied oil or Mobil 15W-30.

Enjoy

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This so called "Ball"

When I first heard of this "ball" years ago, I immediately thought, it is no different than the stories I hear of some people actually using a belt with this thread design. I mean ...why even bother...seriously.

Go look for a belt drive design turntable.

So I asked JC Verdier about this so called "ball".

JC Verdier
So I will tell you another time what is told.
The possible installation of the ball was proposed to answer some customers who want to try to use the ball.
At the beginning it was only optional .
But later , to normalized the manufacturing , I included systematically the kit steel ball + ceramic past.
For my part I am not in favour of using the ball in accordance with the original design .
Probably you have this original design so you don’t have the steel ball.
Don’t worry about the stories of pirates , for sure some of them tried to attract customers by copies , because they are not able to conceive a product by themselves .
I don’t have any of them in hands and I have no comment on their working.
For sure that should be easy if only a steel ball could let a turntable work properly!
JC Verdier

So the lesson here is Business is Business even with Verdier.

The unfortunate thing is people acquiring a newer version of this turntable with a "ball" think it is normal.....do not understand the reason it is there.

fwiw -
I have never had to add oil to the reservoir on my La Platine Granito. It does not leak.

@ct0517  Yes, I agree about the ball.

Platine Verdier users have debated a lot about the advantages and disadvantages of using a steel ball. Removing it is from our point of view the best solution to preserve the turntable from noise and vibrations.
Instructions manual

My bearing does not leak too. But it is open inverted bearing -  the oil flow very slowly to the bottom of the axle.  It's just physics.

Recharging the bearing with oil should be a monthly routine. The consumption of oil is dependent on temperature an how much the turntable is used.
Instructions manual