| 摘要 |
PURPOSE:To make improvements in operatability and operation efficiency well promotable, by controlling a working rate of a lower shaft rocking cylinder with a signal out of a control part which searches for a rocking rate making a rocking period constant by an input signal. CONSTITUTION:In the case where a lens diameter varies, if the indicating signal is inputted into an input unit 32, a control unit 31 searches a rocking rate making the rocking synchronization of the optical part set anew constant, and outputs it to a solenoid valve 28 via a digital-to-analog converter 30 and a power amplifier 29. And, the solenoid valve 28 (electro-pneumatic proportional valve) feeds a cylinder unit 10 with the controlled gas via a solenoid 24, and makes a lower shaft part rock at a rocking period via lead switches 19 adn 20 and a control part 26. Thus, the lower shaft part, where rocking width varies according to size of a lens diameter, is controllable for adjustment so speedily to a constant rocking period and, what is more, operation efficiency is sharply improvable. |
