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My cart is 1.7 g on the vinyl, barely touching , how can it wear at all?"
That 1.7 grams is pressing on two tiny contact points in your record groove. ~50 square micrometers comes to mind. Then the grooves starts pushing the stylus about. Plus heat of surface friction.
Think your 100 pound girlfriend walking on 1/4" stiletto heels. For an instant she puts an equivalent 400 pounds per square inch on the floor. Now have her balance on one heel and hop around.
It's a wonder to me that a record survives ONE playing. As my wood flooring has not. But I still love her.
That 1.7 grams is pressing on two tiny contact points in your record groove. ~50 square micrometers comes to mind. Then the grooves starts pushing the stylus about. Plus heat of surface friction.
Think your 100 pound girlfriend walking on 1/4" stiletto heels. For an instant she puts an equivalent 400 pounds per square inch on the floor. Now have her balance on one heel and hop around.
It's a wonder to me that a record survives ONE playing. As my wood flooring has not. But I still love her.