| 摘要 |
PURPOSE:To uniform the setting of stop values over the whole setting range by compensating a stop opening signal to a straight stop opening signal which is straightly changed in accordance with the stop values. CONSTITUTION:A stop opening signal to be changed non-straightly in accordance with the opening of a stopping brade is compensated to a straight stop opening signal S1' to be changed straightly in accordance with the opening through a stop opening signal compensating part 3, the compensated signal is compared with a stop value reference signal S2 and the stopping brade is driven through a stopping brade driving part so that the difference of both the signals is offset. In case of controlling the stopping brade to the opening corresponding to each of a stop value string, the stop value setting scales of a straight variable resistor 4e can be assigned at an equal interval by setting up the stop value reference signal S2 to be equally changed between respective values in the stop value string. Thus the stop value setting can be uniformed over the whole setting range. |
