| 摘要 |
<p>PURPOSE:To display the condition of a motor with the aid of a signaling means and to judge that the rotational frequency of the motor is normal or not at a glance by providing the informing means which displays the condition of the motor connected to a CPU. CONSTITUTION:Initialization is performed which make the CPU8 memorize the film speed of a microfilm 5 at some fixed rotational frequency which should be the standard or the motor. To detect the film speed during the actual rotation of the motor 4, the total value Q of the pulse number of a counter until the pulse rises at the position A0 of a bridge 6 is found and it is examined that this pulse number Q associates with a standard pulse number P or not. Thus, when they do not associated with each other, an LCD9 displays NG and the CPU8 also controls the speed of the motor 4 until the pulse number Q associates with the standard pulse number P. When the pulse number Q coincides with the pulse number P, the LCD9 displays OK and the speed control of the motor 4 ends.</p> |
