Turntable speed accuracy


There is another thread (about the NVS table) which has a subordinate discussion about turntable speed accuracy and different methods of checking. Some suggest using the Timeline laser, others use a strobe disk.

I assume everyone agrees that speed accuracy is of utmost importance. What is the best way to verify results? What is the most speed-accurate drive method? And is speed accuracy really the most important consideration for proper turntable design or are there some compromises with certain drive types that make others still viable?
peterayer
It is actually 1.8 sec/rev. 33 and 1/3 rev/min divided by 60 sec/min yields 0.5556 rev/sec (0.555555555 repeating). Your tt makes 100 revolutions every 3 minutes or 100 revolutions every 180 seconds. So if you divide 180 seconds by 100 revolutions, you get 1.8 sec/rev.
Dear Halcro: As Dover I'm using thread drive for all the years I can remember either the MS I owned till today and my Acoustic Signature ones.

What is weird is that only " today " many people is discovering when the option always been there.

I don't know you but even with a thread the DD ones performs overall better.

Btw, what Lewm posted and that M.Lavigne refered on other related thread and my own post ( not so specific as Lewm one. ) about that the Timeline is not accurate/perfect as we all are thinking finally there is a " light " that tell us on that non accurate device that already brought some TT owners to a " suicide ".

This could tell us that we have to analize this type of TT subject more carefully that what we are doing till today.

Maybe Mr. Sutherland can comes here to explain the overall Timeline design and to confirm or not that 0.00018 discrepancy.

Regards and enjoy the music,
R.
Dear Raul, I did not mean to imply that I KNOW that the Timeline is miscalibrated. I was just musing after Timeltel's correction of Catastrofe's calculation that in truth the time for one revolution, if the speed is 33.333.... would be slightly more than 1.8 sec. It might be 1.800180018.... I would assume that Mr. Sutherland knows that, too. All he had to do was to build a circuit that can divide 60 by 33.33333... and then trigger a laser according to the result, in seconds. And apparently he warned end users that they might not want to know what the Timeline can tell them. It's like going to the doctor for that pain in your .....wherever.

Dear Henry, I would agree that if the Timeline and the Victor TT101 are in perfect sync, it is likely that the Timeline is bang "on". But in general it is not valid to calibrate an instrument against the thing you are trying to measure with it.
Hi Ikitch,

what the heck I was going to re-package that and sell it for say $$$$ ha! ha! and it actually works.

Hi Syntax,

nothing like going for the jugular, the TW product isn't as bad as you make it out to be. You might not like it personally and find faults which is okay but show me one table that is perfect? You won't be able to.

Even your own MS table has issues in it's original state, you have had to mod it to enjoy. Some MS owners have even changed from the original motor because they felt there was better performance to be had.

There will always be differences and that's life, to me I'm open minded to learning but in the end it's all about listening to music.

It gets real boring and it's just frankly so old now seeing the same replies, I think we all know you don't care for TW product but others do.


Regardless of the accuracy of the Timeline as long as it is consistent then it still demonstrates there's inconsistency when the laser mark moves off target so there is a CHANGE due to stylus drag. It proves there is a change in rotation and it may or may not change the sound but the fact is that there is a change. What is so hard to get? If the Timeline cost only $50. Everyone would just get one and start questioning and addressing the speed issue of the turntable.

I love the KAB strobe and it's a useful device but it cannot show me stylus drag visually the way the Timeline does.

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