| 摘要 |
A magnetic recording head motion translation apparatus for use in head/media evaluation systems is disclosed which includes a translator base for holding a magnetic recording head over a media surface, a linear drive unit, and a cam shaped in a pattern that is proportional to the path that the magnetic recording head will follow over the surface of the media. The translator base is equipped with head loading/lifting capabilities and a cam follower bearing, which maintains contact with the cam. The linear drive unit is a stepper motor in combination with a lead screw. Cross-roller bearings are used to connect the linear drive unit to the translator base, thereby providing a stable force in the direction of the Y-axis, while allowing the translator base to move in the direction of the X-axis. The cross-roller bearings are spring loaded in the direction of the cam to force the cam follower bearing to follow the cam's pattern. In operation, the cross-roller bearings directly transmit the linear force of the linear drive unit to the translator base, thereby assuring the accurate positioning of the head over the desired track of the media. At the same time, the cross-roller bearings allow the translator base to slide in the X-axis direction, thereby allowing the head to move across the surface of the media along the path determined by the pattern of the cam. Changing the cam will allow the path followed by the head across the media to be modified.
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