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Direct drive/rim drive/idler drive vs. belt drive?

O.K. here is one for all the physics majors and engineers.

Does a high mass platter being belt driven offer the same steady inertia/speed as a direct drive or idler drive?
Is the lack of torque in the belt drive motor compensated for by the high mass platter. Object in motion stays in motion etc. Or are there other factors to take into consideration?
I am considering building up a Garrard 301 or Technics SP10, but is it all nonsense about the advantage of torque.
I am aware that the plinths on these tables can make a huge difference, I've got that covered.
My other options would be SME20 or Basis 2500 of Kuzma Stogi Reference etc.
If I have misstated some technical word, please avert your eyes. I don't want a lecture on semantics, I think everyone knows what I mean.
Thanks in advance.
mrmatt

Showing 3 responses by t_bone

t_bone
1,182 posts
 
Mark,

I have not mistaken you for someone else. I am aware of your issues with belt creep. In fact, because I was trying to dance the long way around a subject which I think may be of commercial importance to you, I ended up mis-communicating. Please ignore my comment.

Play on ladies and gents...
t_bone
1,182 posts
 
Mark,
This aspect of inertia of the motor is something I did not really understand the last time it came up (because I assume you are not referring to motor inertia the way the Micro SZ-1 motor does it). If you were talking about that, then I can start to see where you see the similarities between an idler with a high inertia motor and a belt drive with high inertial motor where the belt slippage issue is addressed by bringing the slippage away from the belt-platter interface and to a kind of clutch mechanism which allowed the motor to more or less "apply" the belt to the platter with even force on both drive side and lee-side of the turn.
t_bone
1,182 posts
 
Lewm,
How entertaining... a turntable with a deadman switch...
:^)
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