Tables That Feature Bearing Friction

Dear Dertonarm: Thank you about your system, very nice. No public comments from me other that : yes, for me is of some help to understand ( between other things ) part of your whole audio " thinking/mind ".

Regards and enjoy te music.
Raul.

we can not achieve perfection - we can only try. The long string is no compromise at all. Yes, the string has no stretch at all (a special kevlar derivate). The point is not control of the platter rotation. The point was to prevent the platter from loosing any speed. Control is futile.

Some months ago I tried different belts after reading the article from Conti (BASIS Audio) about it. I bought a few from different Manufacturers and made some test runs with the Micro Seiki 5000 (Belts from Raven, Basis, DaVinci, Amazon, Kuzma, Roksan, Transrotor, Seiki original....and even various ) Strings.....
The result made me curious, because there were big differences in sonic presentation (smeared Details, dull bass, different depth of soundstage etc.)
Even with string was different among themselves (slip, grip, noise etc.)
This was a very interesting experience for me. Some belts are really lousy, I was dissapointed, there are much discussions about more motors, or powerful motors...after all, I am smiling about that.
The goal should be to find the few, who do it right. I mean, really doing right.
No talking about that (most "manufacturers" today prefer doing this).
When one or he other reader want an upgrade, before selling the whole Turntable, try this first.
Could be interesting :)

Belt Test 1

Belt Test 2

String Test 1

Ah, yes!

a = (2*f*sin(x))/mass

Thanks for the trig review. ;-)

So this futzing-about with various types of belt media and such . . . I take it that this is pretty much "de rigueur" to get the best from any turntable that uses the thread-drive approach? What did i.e. Micro Seiki originally intend for the RX/RY-5000 system?

Syntax, In that third photo, is the platter on the right driving the platter on the left, as it appears? This is in keeping with some of Mark Kelly's teachings on "belt creep" and how to prevent it. Anyone interested in this topic should search on the Vinyl Asylum archives for Mark's ideas. He is a brilliant guy who applied math and physics to belt drive and who compared the different qualities of idler-, direct-, and belt-drive to each other, also on a math and physics level. Far be it from me to speak for him, but based on my understanding of his findings, a very long thread between a very narrow diameter pulley and a distant platter is not a good idea, likely to result in significant belt creep compared to other arrangements, such as using one platter to drive another, using capstan type devices to force the driving string to conform to as much of the circumference of the driven platter as possible, etc.