| 摘要 |
<p>Length-control apparatus and method are disclosed for use in association with a strip processing line (L, N, F) processing strip materials at varying velocities and having strip shear means (F) movable along the axis of the moving strip and operable to close and open on the strip in order to cut the same while in motion. The apparatus has sensing means (M) for sensing the length of strip material and generating length signals, a counter (54) for counting the length signals, and generating a trigger signal, means (18) for sensing the velocity of the strip and providing a signal proportionate to such velocity, means (56) for shaping the velocity signal and delivering a servo control signal, servo means (58, 60) responsive to said servo control signal to deliver pulse signals proportional to such servo control signal, and signal combining means (52) for receiving the length signals and servo signals and combining them, for input to the counter (54), and a method of length control for such strip processing line.</p> |
