Correcting drifting with Sutherland Timeline

Not done any tests with various weight LP's yet.
Planning on cutting an 'O' ring to fit in the top groove of the TimeLine so that I can sit my VPI HRX weight securely on top of the TimeLine, for 2 reasons; The TimeLine is not a much of a weight compared to VPI's, and to see if I can get a reading so that I can calculate the speed change & remove the TimeLine and just have the VPI weight.
Also, was hoping to have my Ref 2 Phono back from GNS for the week-end but FEDEX seem to have problems making delivery.............dooohhh!

If this device is as accurate as we are being told, I suspect that in many cases we are going to discover that our motor controllers (even the signature and reference versions that we paid a lot of money for!) are simply not up to the task of setting and holding a fully accurate speed of rotation, even with records of the same weight.
So my question is: on the basis of your experience so far do you have any reason for thinking that the Timeline is simply too accurate for the job?
Best wishes

First I've seen of this cool device, great concept. Every high end TT manufacturer should use one during product development and QC testing - if they dare.

All Teres belt drive tables self-compensate for drift by monitoring a built-in platter strobe and tweaking motor voltage as necessary. This system should maintain overall speed accuracy to well beneath the resolution of the Timeline, since the platter strobe read by the motor controller has more marks per revolution. However, only a few tables have that ability to directly monitor PLATTER speed and self correct (direct drives presumably, but not many others).

With regard to different LP's, I suspect stylus drag due to differing dynamics affects speed more than the mere inertial difference between 120g and 200g records. Once the platter's at speed a heavier LP would help slightly, but 80g more weight is pretty tiny compared to the weight of most platters, especially the 30-80 lb. monsters some of us use.

A ring clamp provides much more inertial benefit than a heavier LP: it weighs alot more and that weight is all out at the periphery. No surprise yours made a visible/audible improvement.

Of course a once-per-revolution strobe cannot measure short duration speed changes that occur and correct in less than a revolution. Short transient rise times occur in far less time than this. Still, steady-state speed at the right speed is certainly laudable - and audible to many if it's off or (especially) changing.

Good report, sounds like it could help many of us make audible improvements ... or change TT's!

Sounds like a great tool. However, I can tell you as a musician and someone with absolute pitch that almost 100% of LPs are not in tune. Somewhere along the recording chain, a slight pitch error occurs. Some are really bad. Like the original Miles Davis Kind of Blue.

So setting a turntable to perfect 33.33 will never make music pitch correct. You need to have ears and adjust for EVERY lp.

So far I've found that it takes about 5-8 revolutions of the HRX platter to recognise a .05 Hz frequency change that I make on the SDS, and stabilse.
I don't have perfect pitch but this helps me get closer to perfection than I've ever managed with a strobe disc, with the big advantage that you adjust while the lp is playing live.
IMO: Worth having if you have a t/t in which you can finely adjust motor control.