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In Reply to: RE: Anti skating is pissing me off posted by Biff on April 21, 2015 at 09:37:32
I know this idea, like everything else in analog, is controversial, but many think that setting AS using a blank LP is "wrong", because the skating force is due to the friction force created when the stylus tip engages the grooves in an LP. But beyond that, my advice would be to use less AS, obviously. Whether you want to use no AS at all is up to you, but for sure there IS a skating force that will be unopposed if you use no AS. There is no perfect setting for AS, because skating force is changing all the time during play, and in a rather unpredictable way (because of groove modulations). As for me, I set AS to the lowest possible amount, and then I forget about it. In my system, total absence of AS results in bad R channel distortion (with one of my tonearms and one of my cartridges, to be exact).EDIT. Everyone else who pointed it out is correct. What you've got there could be the result of too little AS, not too much. All I can say is I considered that possibility then made an error in my analysis.
Edits: 04/21/15Follow Ups:
Lew ...regarding the poor performance of that cartridge without a/s. Do you use a MINT protracter so that you can accurately set up the cartridge? Sounds like it's askew
Even the most perfectly aligned pivoted tonearm will generate a skating force, according to all information and even to my own way of thinking. It's the law.
Right Lew....the stylus wants to travel to the label....and that's exactly what it does.
Edits: 04/21/15
The stylus is guided toward the label by the spiral grooves toward the label, but there is an additional force generated in pivoting tonearms that tends to push the stylus preferentially against the inner wall of the groove. Primarily, this skating force represents a fraction of an equal and opposite product of the force of friction between stylus and groove. Its vector is directed toward the spindle, and therefore the inner wall of the groove, because the tonearm, absent headshell offset, can never be tangent to the groove. At least not in the case of almost all the pivoted tonearms we use that employ stylus overhang. (See the Pythagorean Theorem.) The addition of headshell offset (and proper alignment) gets us two points across the playing surface of the LP where the stylus/cantilever can be momentarily tangent to the groove. I could go on, but I have a feeling you know all this and would rather believe in pixie dust. Which is OK with me. No offense intended re pixie dust, was just trying to inject some humor into this dull subject.
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