lewm
Consider a properly aligned true, tangential, straight-line tracking pickup arm. Its stylus has friction in the groove, just as a pivoted arm. But the straight-line tracker is not subject to skating force. The reason for that is that the real cause of skating force is the offset of a conventional overhung pivoted arm. A consequence of that offset is indeed friction created by the stylus in the groove. But again, that’s an effect - and not the cause - of skating force.
Consider also that the same exact cartridge will have different skating forces if installed in two substantially different pickup arms. That’s because the greatest factor in generating skating force is the arm, not the stylus - although different stylus shapes will result in different skating forces.
... in real life the cause of the skating force is friction in the groove ...We have been down this road before and you are mistaken. Clearly, you are confusing cause and effect.
Consider a properly aligned true, tangential, straight-line tracking pickup arm. Its stylus has friction in the groove, just as a pivoted arm. But the straight-line tracker is not subject to skating force. The reason for that is that the real cause of skating force is the offset of a conventional overhung pivoted arm. A consequence of that offset is indeed friction created by the stylus in the groove. But again, that’s an effect - and not the cause - of skating force.
Consider also that the same exact cartridge will have different skating forces if installed in two substantially different pickup arms. That’s because the greatest factor in generating skating force is the arm, not the stylus - although different stylus shapes will result in different skating forces.