| 摘要 |
<p>PURPOSE:To improve the speed of tape fast feed / fast rewinding by applying a motor driving voltage set to a prescribed value by a voltage change means to a motor driving circuit to drive a motor and using the voltage change means to decrease the driving voltage of the motor when it is detected that the load of the motor reaches a prescribed value or over. CONSTITUTION:A voltage change means 24 changes a motor driving voltage applies to a motor 21 via a motor driving circuit 23. A driving means applies a motor driving voltage set to a prescribed value to the motor driving circuit 23 at first to drive the motor 21. Then a load detection means 26 detects directly or indirectly it that the load of the motor reaches a prescribed value or over and the control means uses the voltage change means 24 to decrease the drive voltage to the motor 21 when the load detection means 26 detects it that the load of the motor 21 reaches a prescribed value or over. Thus, the motor is controlled to a high number of revolutions up to the limit of the capability at the usual load to improve the tape fast feed / fast rewinding speed.</p> |
