Abstract
This paper reports the results of a study on the relationship between slider’s dynamic flying height stability and spindle motor vibration. The investigations were carried out with in situ flying height testing technology introduced by the authors. The unbalanced modes, which are the rocking motion of the spindle, were studied in the experiment. Results obtained show that the dynamic stability of slider is a function of the spindle vibration. It is interesting to notice that higher frequency vibration of spindle motor has a greater effect on slider dynamics. Investigations are also extended to characterize the dynamic behavior of the sliders with two types of air-bearing surface (ABS) designs. Results indicate that sliders with higher roll stiffness are of better dynamic performance and flying height stability under the unbalanced modes vibration of spindle motor.
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