Stylus-Drag..Fact or Fiction?


Most audiophiles can't seem to believe that a tiny stylus tracking the record groove on a heavy platter could possibly 'slow-down' the rotating speed of a turntable.
I must admit that proving this 'visually' or scientifically has been somewhat difficult until Sutherland brought out the Timeline.
The Timeline sits over the spindle of the rotating disc and flashes a laser signal at precisely the correct timing for either 33.33rpm or 45rpm.
By projecting these 'flashes' onto a nearby wall (with a marker attached)....one can visualise in real-time, whether the platter is 'speed-perfect' (hitting the mark at every revolution), losing speed (moving to the left of the mark) or gaining speed (moving to the right of the mark).

RAVEN BELT-DRIVE TT vs TIMELINE 
Watch here how the laser hits the mark each revolution until the stylus hits the groove and it instantly starts losing speed (moving to the left).
You can track its movement once it leaves the wall by seeing it on the Copperhead Tonearm.
Watch how it then speeds up when the tonearms are removed one by one....and then again, loses speed as the arms are dropped.

RAVEN BELT-DRIVE TT vs TIMELINE
Watch here how the laser is 'spot-on' each revolution with a single stylus in the groove and then loses speed as each additional stylus is added.
Then observe how....with NO styli in the groove.....the speed increases with each revolution (laser moves to the right) until it 'hits' the mark and then continues moving to the right until it has passed the mark.

Here is the 35 year-old Direct Drive Victor TT-81 turntable (with Bi-Directional Servo Control) undergoing the same examination:-
VICTOR TT-81 DD TT vs TIMELINE 
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noromance, you can say it was me. If you read jtimothya's link you will see idler wheel drives are dismissed out of hand. Then there is a long winded dissertation on the pitfalls of belt drive. What he says is technically true and I am sure he thinks he can hear these anomalies. His and noromance's hearing is obviously better than mine. But he conveniently leaves out the opposite. The platter also dampens the motor. In an idler wheel drive the connection is more direct. The mass of the platter dampens the power surges of the motor. Partially and even totally diminishing the cogwheel effect. In a belt drive things get more complicated. Kuzma solves the issue by using a heavy platter and a very stiff belt which again dampens the motor. But, is motor cogging really an issue. I suppose it depends on the motor. Another issue this author seems to ignore. Some motors hardly cog at all. This author's view of suspended turntables is interesting. Yes, if the suspension were continuously bouncing it might induce speed changes. I suppose I jump up and down in front of the turntable while I am listening to music just to watch it bounce. It is at absolute rest 99.9% of the time. I will gladly accept minor speed variation versus my tonearm hopping across the record when someone walks into the room. Anyway, the problem with idler wheel drive turntables is noise more so than speed variation. 
I think the Grand Prix turntable is very cool and I would love to hear one in action.
The fact that friction slows the turntable down a little should not surprise anyone. Some tables now will maintain a constant speed/pitch regardless of load within reason. A good idea given with modern motors and electronics it should be easy to do. The Monaco certainly does this at high resolution. But is the motor well shielded. Having your cartridge floating above an oscillating magnetic device is counter intuitive.  
Mike, you need to get rid of both the Wave Kinetics and Saskia. Get yourself one of those Monaco 2.0 tables and put a Gabon Ebony Durand arm on it. The Gabon Ebony has seriously better timbre than the rosewood and has much lower stylus drag. And here I am stuck with this crappy Clearaudio Statement. But don't worry. I just ordered a Basis Work of Art. I can put the Statement in my Summer home in the Catskills.
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@mijostyn If you're concerned about your tonearm skipping across the LP when walking around your music room, we have bigger problems than initially interpreted!