CSPort Turntable speed control

The TAT1M2 has a built-in strobe that when you press the “Lock” button (which actually unlocks the process) the strobe turns on and now you can use the + or – buttons. The strobe flashes along the spinning platter and you see lines that move faster or slower, just as if you have placed a strobe disc on the platter but again it’s built-into the outside of the platter. You hit the plus or neg button until the lines stop moving then you hit the Lock button whcih locks the speed in and there you have it. Simple, quick and efficient.

(Dealer disclaimer)

@sksos 

Thank you!

So I gather there is no servo or feedback mechanism that attempts to continuously correct speed. Yes?

Dear @lewm  : This is what CS Port says about the motor rotational speed:

" a highly accurate voltage is supplied to the motor without fluctuation based on a crystal oscillator with high frequency accuracy.  "

They use the word " accuracy " but not exactly by the TT speed stability that's in true inside " mediocrity " by CS Port spec: where the rotation precision is:

+,- 0.3%. This means that that TT has a swing of 0.6% on speed precision  ! go figure what you pay for that TT  $$$$$  !  ! I don't give it a " dime " for it.

I don't know what do you think about? and the owners?

Regards and enjoy the MUSIC NOT DISTORTIONS,

R.

Interesting perspectives.  I'm always thinking about what sounds like really cool technology for turntables and then also how long that part last or that sensor or re-calibrating.  I think the SME Model 60 was just released and I don't think that table is doing live monitoring of the speed and making corrections....I think you calibrate it and leave it?

The Döhmann Helix One MK3 looks really cool!  Might be out of my budget.  

That Esoteric Grandioso T1 Magnetic drive systems looks really cool as well!  But I think it's a step up from what I'm looking at.  

Dear @chauncey : SME always been a sinonimous of truly high quality designs and excecution on those designs. The 60 is the Ultimate TT for any one no mtters what and with the advantage that comes with a new SME tonearm. About its control speed SME uses DSP technology as you can read in its site.

Now, what is the main target in any TT at any price must be: spin accurately at the RPM 33.33/45 and stability on those RPM. You can read in SME site too that the speed error for the 60 is: -0.005% .

That’s is quality that any serious audiophile and MUSIC lover are looking for. All the other TT overall characteristics are in secong place/step that that speed stability.

In other side you can always mate the 60 with an after market vaccum hold dow mechanism.

If you can afford go for it. You can’t go wrong with the SME 60.

R.

I don’t know why @mijostyn on TT’s always recomend Dohmann when he likes in other areas SME.

Btw, the Dohmann is motitoring continuosly each secon its RPM speed to make the changes need it and in this specific regards I think that the SME60 is better. The Dohmann speed error is -0.01 % and in no other measurements is superior to the 60.

@rauliruegas

I've always liked SME and the reason I have an SME arm. But really how in the world do you get .005% accuracy with a rotary knobs?  You could breath hard on the knob and move it more than .005%?

@rauliruegas , The SME 60 is a fine turntable. It has all the feature I deem crucial in a turntable. It's major issue is the price and the fact that you can not get it without the arm. I'm sure the arm is excellent. The Dohmann's claim to fame is it's negative stiffness suspension in both vertical and horizontal directions. I suspect it is superior to the SME's suspension but I have no proof of this. It can mount two tonearms of any size. The SME is limited to one 9" arm. As you are aware we agree that arms longer than 9" are inferior. However, there are arms like the Reed 5A and Schoder LT that require more space even though their arms are actually shorter than 9". 

I read Michael Fremer's review of the 60 and he made one glaring error I would like to correct. Al Conti did not invent the hanging four point suspension. David Fletcher did when he designed the original SOTA Sapphire. David and Al were good friends and was by all accounts honored that Al wanted to use his design for the Debut. The only difference is that the SOTA's suspension is hidden by it's cover.  

Dear @chauncey  : Fro several years SME was the side line of an Aero Space corporation and that test/spec speed is part of that very high technology/engineering legacy.

That SME 60  sspeed test is " formidable " in any BD TT. Numbers like that were reserved for DD vintage TTs as the Technics SP-10MK3. If you really are interested in the 60 you can't go wron with it. This is the Technics speed:   R

Info about background of designer/owner of CSPORT

My name is Machino TOSHIMICHI MACHINO and I am the owner of CSPort. CSPort is a new company that has only been established for 6 years. We are specializing in the high end audio market. All CS Port products have been designed by me. I'm training young engineers to be able to design them in the next few years.

CSPort products are the result of my 3 years of experience in machine tool design, 40 years of designing switching-power supplies and 50 years of hobby audio. My main techniques are in the area of switching power supplies and audio amplifiers, especially noise suppression techniques. The details of the amplifier include not increasing the number of amplification elements, not applying negative feedback, not using chemical capacitors in the amplifier's signal circuitry and power supply, and applying noise suppression.

The TAT2 is characterized by use of a granite base, a stone that has been stabilized for over 5 million years and a 17 kg stainless steel platter to reduce unwanted vibrations by means of weight. The surface of the platter is also mortised and the records are held together by heavy stabilizer.

One of the issues of classic designs is the fact, that the frequency of the motor drive servo enters the audio band. Than this servo noise is picked up by the cartridge. The same is true for synchronous motors because they feature a mechanical servo. It takes some time for the TAT2’s platter to get to a constant rotation, but it is achieved without a servo hence there is less audible noise. TM

Very impressive IMO

Dear @mijostyn : SME 60 and its new tonearm is unique, this is not more of the same and a gift by SME for who can afford.

I’m not saying that Dohmann is not good enough. Dohmann took an after market platfform and made some modifications on it for its TT. That makes me to believe is not in anyway superior to the 60 but for some time you are in love with Dohmann: good.

I was not aware of that anecdot between Fletcher and SME.

I owned Fletcher " The Arm " that was a copy of the Switzerland Breuer design and if I remember manufactured by Jelco. Other " curiosity " on Fletcher was the original Sota Mat where the blend materials were not invented by Fletcher but came from a third part that never shares with David the formula of that mat. The today Sota Mat looks like the original ( I owned 2 of them and were just fabolous. ) but it does not performs because the blend materials are different. No, I’m not trying to diminish the Flecher high reputation.

If some one wants to read the Fremer review you posted here it’s:

https://www.theabsolutesound.com/articles/sme-model-60-turntable-and-va-series-tonearm/

R

Btw, that " sligth blowing " with phono with ears really close is something weird in your system . My phonolinepream Essential 3180 does not shows that " blowing " not only with my 95db speaker sensitivity but does not do it in Guillermo ( close frend. ) room system that by coincidence owns the top model of your electrostatics and the JC-1 but till today my 3180 only is at my place. Lewm owns the 3160 as other gentlemans and other the 3150 that was the design with what we started.

The 3180 is a true up-grade over the 3160 and in other thread I posted that we will manufacture a few 3180 that I think is a must to listen due that you are a way demanding MUSIC lover/expert audiophile.

Dear @sksos  : What did CS port did it it does not matters because the fact is that " terrible " spedd deviation.

About TT servos you already read it what I posted in the other chauncey thread and I know due that you posted there too. Well down there I posted:

""  and we have to remember that all the cutting machines in the recording proccess comes with DD motors and all those motors control its speed by servo. That means that if we can't be aware of the recording used servo then it's no trouble at all."

Lewm owns the SP10MK3 with servo control for speed and this MK3 in several ocasions was used ( the motor ) by cutthing lathe machines. You can ask lewm if he can detect something about servo and he owns a high resolution room/system.

No one can do it. TT colorations always exist, certainly not by the servo but again at the end what counts are the facts and CS Port ( with out dimishing the designer. ) been short in that overall speed issue.

R.

@rauliruegas , Mark Dohmann enlisted MinusK to help design the suspension under his turntable because he realized that it offered benefits that no other type of suspension could. You have to look into what a negative stiffness suspension does. The majority of them are not used under turntables, they are used under scanning electron microscopes and other sensitive lab equipment. The suspension in all SMEs, Avids, Sotas and Basis turntables do not offer any significant benefit over David Fletchers original design. They all hang the platform from springs and add various forms of damping. The MinusK does not work this way and I am not good at explaining it so I encourage you to go to the MinusK web site and read up on it. One major claim to fame SEM has is a construction quality second to none. The one thing they have to do is stop making everyone's decisions for them. I would like to be able to mount my own arm thank you.