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How so?

Joe, I am not following you. You are correct that in order for my example to work the motor must have additional reserves of torque. The Certus motor is capable of delivering enormous amounts of torque so this is a non-issue. At a microscopic level stylus drag variation will always affect speed. But the goal is to diminish the affect since it cannot be eliminated.

Using your example we are not trying to beat beam flexure, but rather trying to keep the flexure constant. The beam analogy does not quite fit here. But it could be thought of as a stretched string. The motor and the brake are on opposite ends of the string pulling it taut. And stylus drag is like a bird landing on the string. The bird will always deflect the string, but higher tension on the string will reduce the deflection. Does this make more sense?

Regardless of the theories (that often end up being wrong even when they seem solid) the addition of a substantial eddy current brake simply sounds better. I may be in the weeds with the theory, but our ears tend to tell the truth.


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