| 摘要 |
A positioning device for controlling a servomotor (2), comprising a two-way valve with a fluid inlet, an outlet and two opposite outputs for powering the movement of the servomotor (2), the slide being coupled via a control mechanism to the thrust rod (1) of the servomotor (2). The device comprises an electric actuator with two portions that are mutually movable in response to an electrical signal. One of the portions operates the valve slide and the other portion is operated by the thrust rod so that the relative movement of said two portions is cancelled when the thrust rod is in its set position. |
