| 摘要 |
<p>An apparatus for detecting mutual positions and controlling travelling of a plurality of working components (2, 3, 4) sequentially mobile along parallel straight-line paths (6), the apparatus comprising an electronic control unit (20), differential drive means (19; 26, 27, 28) for the said working components (2, 3, 4) and a transducer (21) arranged to detect the position of each working component (2, 3, 4) and to generate output signals indicating the position of each working component for the control unit (20), whereby the control unit will generate control output signals for the drive means (19; 26, 27, 28) for the relative differential movement of the working components (2, 3, 4). <IMAGE></p> |
