| 摘要 |
Each box is folded in a gluer. As each box, in succession, transfers to the stacker mechanism a counter produces a variable width pulse. These pulses are converted into fixed width pulses with frequency proportional to the rate at which the folded paper boxes transfer to the stacker mechanism. The control circuit converts these fixed width pulses to constant energy pulses and integrates the constant energy pulses to provide a DC set point signal for a DC motor drive speed control circuit. During operation, the control assures that the stacker mechanism advances a fixed, incremental distance each time a folded paper box is received from the gluer. This ensures even spatial distribution of the boxes along the stacker mechanism. |
