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In the Forum: Analog Playback
In the Thread: Ultimate Turntable
Post Subject: Belt torquePosted by hagtech on: 6/21/2008
Wow, I never thought of that before. But you could be right. Perhaps the only section of belt contact that matters is that last inch or two before it leaves platter. Clearly the belt does not push, it can only pull. And if belt has some elasticity, then you are right, and only the last few inches. Then again, too little contact and the belt may slip.
The concern about pulling the platter off bearing axis has always been an issue for me. That is why the two motor system that has pulleys on both sides of platter can help. It does not add an extra lateral force on bearing.
I've seen and heard the Raven tables, met the designer. He puts everything he can into them. I believe the copper was chosen for sonics, not because it looked different or had good thermal or conductivity parameters. The tables are extremely well built, and appear to be machined to extraordinary tolerances. If I had the cash, I would not hesitate to buy one of them. They deliver a lot of dynamic range.
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