The Development of the FLoating Head for the Magnetic Drum

概要

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To develop a floating head mechanism for use with a magnetic drum, investigation of the plane slider and the multi-leaf parallel-spring has been carried out. A new nondimensionalization has been used in the Reynolds equation to obtain floating characteristics of convergent-divergent film shape plane sliders. Design charts have been made from the numerical solutions. A multi-leaf parallel-spring has been developed to suspend the slider. This spring applies the load and is simultaneously used as lead wires to the magnetic heads. The floating head which has been developed has a 2 micron floating space and a 56 bits/mm bit density applied to the MDA-03 magnetic drum (250 mm dia, 3 000 rpm). The floating head is composed of the multi-leaf parallel-spring, which has small torsional rigidity, and the multi-pad plane slider which has a large torsional moment around the slider length axis. Therefore, no adjustment to the width direction angle is needed to set the floating head.
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