| 摘要 |
<p>PURPOSE:To prevent a magnetic tape from unwinding and a rise time of a motor for magnetic tape feeding from becoming irregular, by a method wherein the motor for tape feeding is driven by a large current for a prescribed short time and then driven by a current of a small average value so as to make it rise. CONSTITUTION:A current limiter being operated in two stages separately, a motor 21 for magnetic tape feeding is driven by a large current (3A) for a prescribed short time and then driven by a small current (1.5A) through a driver 22 under the control of CPU 24. Thereafter a switchover to a constant-speed control of the motor 21 is made. Accordingly, the motor 21 can be made to rise stably and irregularity of a rise time is prevented.</p> |
