A thesis of this book is to design and install the cutter head and cutter, iron tail. (Crop Shear) by the use of PLC in the automatic control of the machine and control programming language ladder diagram by khasensoe photoelectric detector before entering the steel cutter heads and tails, steel. When the sensor detects the system will control the steel cutting head and tail conditional automatic steel is a head-and-tail can be cut of steel with diameter 36 mm, and 40 mm according to the desired size from the experimental results. Cruise control head and tail cutter-steel cut 60 lines per hour, which cut more than a machine-based control to 20 lines/work hours, have greater productivity and the machine can cut the head and tail of the steel that is similar in length, thus reducing the loss of length of steel up to 366.1 inches/hour automatic control system, so more efficient than systems that use the control to work.
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