| 摘要 |
<p>PURPOSE:To almost fix the traveling speed of a tape independently of the winding diameter of the tape by detecting the rotational speed difference of reels and applying respectively reversed driving force to respective reel driving motors. CONSTITUTION:The rotational frequency of a tape feeding side reel 2 and that of a tape winding side reel 1 are independently detected and F/V converted into voltages proportional to respective rotational speeds by F/V converters 3, 4. The rotational speed differences of the reels 1, 2 are found out respectively from the rotational speeds of the reels 2, 1 and a motor driving circuit 9 for driving a reel driving motor 5 for the reel 1 is controlled by an output from a differential amplifier 7 obtained by subtracting the rotational speed of the reel 1 from that of the reel 2 to apply reel winding driving operation. On the other hand, a motor driving circuit 10 for driving a reel driving motor 6 for the reel 2 is controlled by an output from a differential amplifier 8. Consequently, a fixed tape traveling speed can be obtained.</p> |
