| 摘要 |
A movable carriage carrying magnetic transducer head is positioned at predetermined points adjacent a floppy disc surface for appropriate reading/writing of data thereon. The transducers are positioned by a permanent magnet stepping motor which rotates a cam shaft. The cam surfaces on the shaft drive a plurality of balls into engagement with opposed racks defining "V"-shaped notches of different pitches formed on a surface of the carriage and on a fixed surface adjacent thereto. As the balls sequentially enter the "V"-shaped notches, they force individual pairs thereof into alignment, the carriage and thus the transducer means are sequentially and discretely positioned at predetermined data track positions on the floppy disc.
|
