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
For $400, the timeline needs to be built with an internal clamp so that it will fit any spindle.
Lew and others with "the big spindle" issue. Could you stack enough metal washers on the spindle to leave only the top exposed, then use that to center the Timeline? If the top of your respective spindle is slightly rounded this might work. If your spindle is machined flat across the top then I suppose you could only "approximate" centering.
Hi Albert,

Yes, having the Rockport Sirius lll here last year was really some enlightening audio fun. It is now with Mik in the UK...he is a mad about Rockports; three lll's, and two ll's. He is also a big fan of stonebody Koetsu cartridges and the Goldfinger cartridge.

Like yourself, I do like to hear and make decisions based on what is going on in our systems.

I believe that in my case with the Rockport along with your case with the NVS, we both decided that we were not able to replicate what was presented. So, mine has found a new happy home; similarly, you are trying to find a new home for your NVS and Talea.

Albert, I have fondly followed your posts and do appreciate your desire to find the differences that work.

Cheers!
Alan
Alberporter: Intuitively, I would think that what a dd turntable sits on would have a big effect on its sound. Maybe you've addressed this with plinths, but I would still think what that sits on should be discussed much more than it is, and wonder why it is not. Is that because the plinth lessens the need for proper sitting(A little bit off the subject, but what the heck.)?
Guys, Yes, I thought of offsetting the Timeline so it rests essentially above the spindle or so that the spindle can enter it just enough to center it. However, my fear then is that if the Timeline is even very slightly off center, it will make the TT appear to be off speed. This is because the Timeline seems SOOO sensitive to slight speed variations. It seems to me that it would not be difficult to provide 3 different adapters with the Timeline so as to fit each of the 3 possible standard spindle diameters snugly. Errors due to off-center positioning of the Timeline could be quite misleading. (Or maybe not; I have to think about that.)

Hiho, I think the L07D servo was designed to be "underdamped" as well. Whoever the guy was who modified his own Technics, he either has developed a good understanding of how its servo works or... not. The very idea of playing around with the servo is a whole new can of worms.