| 摘要 |
A bidirectional stepper motor having a lead screw coupled thereto is mounted to a sliding base which has two right-angular contact surfaces for sliding contact with two right-angular reference surfaces formed on a fixed platform of the machine. Fixedly mounted to the platform and extending parallel to both reference surfaces, a guide rod has a transducer carriage slidably mounted thereto for guiding the same in a radial direction of a flexible magnetic disk or like record media. The transducer carriage is mated with the lead screw for linearly transporting the transducer from track to track on the disk upon incremental rotation of the stepper motor. The sliding base is sprung against one of the two reference surfaces and is fastened to the other reference surface by screws inserted in and through clearance holes in the sliding base. Before fully tightening the screw, the sliding base may be moved by a suitable tool back and forth along the two reference surfaces, within the limits determined by the clearance with which the screws pass through the clearance holes in the sliding base, for fine adjustment of the longitudinal position of the lead screw with respect to the radial position of the transducer on the magnetic disk.
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