Thesis this book. A control system design and installation of cut and the cut steel.(Crop Shear) using PLC to control the operation of the automatic machine Programming control ladder diagram language. The photoelectric sensor to detect the steel into the cutter head and tail steel. When the sensor saw steel. The system can control the cutting and tail steel automatic is conditional The machine can cut off his head and tail of steel wire with a diameter 36 mm and 40 mm according to size, from the results of the experiment. A control system cutter head and tail steel cut 60 line / hour. The cut over machine was used to control 20 lines per hour yield more. And the machine can cut and iron tail with similar length, thereby reducing the loss of the length of steel to 366.1 inches per hour. Therefore, automatic control system is more effective than the control system work.
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