... cutting machine at first , reach " ". Sent out the signal for PLC by the photoelectric switch, cut the cut that the air ... , " photoelectric switch 2 " sends out the signal for PLC, PLC controls D1 and stops operating PLC at the same time is it is it ... ", finishes an electric movement cyclical process, control and controls whole electrically by PLC procedure and finishes. In addition, push the board on ...