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
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I suppose using a strobe disk and the Timeline laser then comparing the results. I don't lose much sleep over it...I use a strobe disk and that is good enough.
I like and use a digital tachometer for checking speed accuracy. I've tried strobe discs but like the tach more.
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I have the Kab strobe disc and laser pointer which I have used reliably for the last two years and I have now just obtained the Sutherland Timeline laser weight.
The Timeline demonstrates that the Kab strode is merely an 'approximation' of correct speed.....or at least is not capable of detecting instantaneous 'stylus drag' which is clearly visible with the Timeline.
I can assure anyone......that once you have heard a record played without stylus drag.......speed constancy will become an important factor in your vinyl experience :^)