| 摘要 |
PURPOSE:To enable to control a stepping motor in multiple stages in a wide range by movably controlling the motor temporarily in a range not exceedinf the middle point in a control range exceeding a middle point and then movably controlling the motor to the object step at the point as the second reference point. CONSTITUTION:Since the step VIII' of the same exciting state as the step VIII interposed between the steps IV exists at the position of the equivalent step distance when the point A on the rotor 31 of the step motor 30 is controlled so as to be opposed to the middle point P8 on the step 35 from the state opposed to the stable point P4, it does not always reach the step VIII even if the step motor is set to the excited state of the step VIII. Accordingly, when it is allowed to reach the point P8 after the operation of the step VI is once performed to be controlled to the point P6 disposed between the P4 and the point P8 of the middle point, it is not controlled to the step VIII', but effectively controlled to the step VIII. |
