| 摘要 |
<p>PURPOSE:To restrain the change of tape tension and to make a time required for switching a speed short by executing correction according to the detecting output of torque which is changed in proportion to the winding diameters of a supply and a take-up reel and generated by the driving torque control system of a reel motor CONSTITUTION:The output (a) of a rotational speed detector 4 is inputted to a speed detection circuit 17 and the speed change (acceleration) of a term that a capstan motor 3 is accelerated and decelerated is detected. Besides, the output (b) thereof is inputted to an S reel driving torque correction circuit 18 and a T reel driving torque correction circuit 19. According to the speed change, the set data (c) of S motor driving torque impressed on an S motor driving circuit 9 and the set value of T motor driving torque impressed on a T motor driving circuit 14 are corrected as much as a prescribed value.</p> |
