| 摘要 |
PURPOSE:To perform a battery check by using the continuous actual loading of an electromagnetic driving device by powering on the electromagnetic driving device forward and backward and setting its frequency to a frequency at which the electromagnetic driving device neither responds nor operates. CONSTITUTION:When a film is advanced by a motor 105, an H-level signal is outputted from an output terminal B of a driving signal generating circuit 119 to turn on a transistor TR104 through an OR gate 114. At the same time, a TR101 is turned on. Further, the TR101 is turned on at the same time and the motor 105 is powered on forward. When the film is rewound, an H-level signal is outputted from an output terminal A of the circuit 119 and the motor 105 is powered on backward. When a battery check is perfarmed, an H-level signal is applied from a battery check signal generating circuit 122 to AND gates 115, 116, and 118 and a pulse of the frequency at which the motor 105 neighter responds nor operate is applied from a frequency dividing circuit 120 to an AND gate 115 and an inverter 117. Thus, the voltage of the battery E when the actual load current is flowed to the motor 105 is checked.
|
