| 摘要 |
<p>PURPOSE:To obtain an optimum speed reduction characteristic by varying an impression voltage when a capstan motor slows down in accordance with the time necessary for accelerating the capstan motor. CONSTITUTION:A capstan motor drive signal 13 is transmitted to a driver circuit 7 through an output port 6 to start the capstan motor 8, and a start signal is transmitted to a time measurement circuit 4 to start the measurement of the time. A microprocessor 1 reads the measurement value of said circuit 4, that is, the time necessary for accelerating the motor 8, and writes it in a RAM 2. When a travel instruction signal 11 is stopped, the stoppage is detected to switch the signal 13, and the motor 8 is driven in the reverse direction and slows down. The time required for starting is read, and a voltage impressed to the motor 8 is decided by referring to a table stored in a ROM 3. Then the contents of the signal 13 is changed and transmitted to the drive circuit 7.</p> |
