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Original Message
The arm does have skating force
Posted by Mark Kelly on October 21, 2012 at 15:10:22:
Long discussion on this some time ago on DIY Audio.By the analysis linked below, the arm will have a skate force component because the stylus reaction force vector does not pass through the main pivot point. Until Frank reveals the exact details of the magnetic track components the amount of skate force is difficult to calculate, but on first principles for a design like this it must exist and it must change with arm angle.
Caveat: Frank is a genius and his knowledge of magnetics far exceeds mine. It remains a possibility that he has developed something which is not covered by my analysis.
EDIT: I'm probably wrong. See JE argument below