Method and apparatus for measuring half frequency whirl in a spindle motor

   
   

An apparatus and method of indirectly measuring half frequency whirl in a spindle motor having a rotor adapted to rotate a disc having a track which is followed by a transducer head that is actuated by a control system is provided. Vibration signals produced at the transducer head while the transducer head follows the track are detected. The half frequency whirl is determined as a function of the detected vibration signals.

Un aparato y un método indirectamente de medir medio giro de la frecuencia en un motor del huso que hace un rotor adaptar para rotar un disco que tiene una pista que sea seguida por una cabeza del transductor que sea actuada por un sistema de control se proporciona. Las señales de la vibración produjeron el al frente del transductor mientras que se detecta la cabeza del transductor sigue la pista. El medio giro de la frecuencia se determina en función de las señales detectadas de la vibración.

 
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