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
We interrupt this program for one comment on tt speed accuracy: For those of you who have been holding your breath for a report on the speed accuracy of my SP10 Mk3, results are in: Perfect! I am so relieved I am going to sit down now with a stiff cognac, keeping in mind that this is a Sunday morning. I had had such faith in the Mk3 that I had never checked it before, even with my KAB strobe, but you guys have made me question my convictions.

The AC voltage at my wall socket is 121V this morning. I actually feared that this over-voltage (Technics PS says to feed it 110V) would confound the Technics. But the PS has an AC regenerator built into it, so apparently no issues.
Dear Geoch, I agree totally with your 'whealty assumption'
reg. the ''exclusive TT's''. The prices are 'astronomical' but obviously not economical. Ie those are not easy to sell. So your pressuposed 'whealthy victims' are probable very scarce kind of the human kind. I do believe that we in this forum are crazy but within the reasonable bondaries. Not a merrit of our psychology but of our means. I see that you are very well informed about those 'exclusive babys'. I never heard about George Bernard btw.

Dear Lew, I had no idea that you can be also charming. I was 'programmed' to expect mainly critical remarks from you. Thanks for your comment about my Kuzma. But before my Kuzma I owned the Audiomeca J 1 . They are very similar qua design philosophy so it may be the case that Kuzma 'borrowed' some ideas from Lurne.

Regards,
01-22-12: Lewm
We interrupt this program for one comment on tt speed accuracy: For those of you who have been holding your breath for a report on the speed accuracy of my SP10 Mk3, results are in: Perfect!

Same for me, in fact the MK3 is the only turntable we have tested so far that has zero movement.

01-22-12: Ketchup
Lewm,

Congratulations. Is that with the stylus in the groove?

In my case no movement either way.

In fact, I can play an LP all the way through, 33 or 45 speed and the Timeline laser is still beaming at the same spot on the wall when I cue up the arm at the end.
Hi Albert,

when you say the MK3 is the only one tested with zero movement is that also making reference to the NVS you also own currently?

You did own the one NVS prior which you were listening to for a while and statrted hearing noises 'bearing" and sent it back to be fixed, you know what I mean.

I'm not trying to bring up past issues but just curious.