Lewm, I think that is driven by skating forces that arise as soon as the arm is out of tangent. If you'll notice the cartridge is mounted square in the headshell- no offset angle- which would increase said forces.
Dear friends: Only to share a different new tonearm on the market. Musical Arts's description is really even with no promises of any kind and this is a good thing. Looks interesting:
I still don't understand how the rear of the arm knows how far to move to keep things aligned. I mean the only think attached to the record, and guiding the whole mechanism, is a small fragile stylus that is actually moving in all directions within the groove.
There's a little guy in there that moves it for you :)
It is the tracking force in tandem with the skating forces that arise if the arm gets out of tangent that realigns it. If you are thinking this relies on really good bearings you are correct!
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