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Currently, in the field of automation control methods are the main relay control , computer control and PLC control three. Since the PLC control system and relay control systems and computer control system, compared with the design , installation, wiring , commissioning workload of small , short development cycle , high reliability , anti- interference ability , low failure rate , low requirement of the work environment , easy maintenance and a series of advantages , therefore , has become the preferred control scheme sawing and abroad . The relay control system due to poor technical performance , single function , will gradually be eliminated . In this paper, aluminum windows and doors Saw transform this specific research topics proposed by the PLC control system to replace the existing relay control system , servo motor to achieve precise positioning saw head , prepared a cutting optimization software to achieve the optimal allocation of cutting , which enhance the original Saw cutting precision , productivity and cost reduction are of great significance . Thesis is divided into two parts : The first part of the design is the implementation of the system , in this section design includes servo system based on PLC and the overall program , software and hardware design and implementation of programs , given a specific input / output wiring diagrams, and based on PLC control system, electrical control circuit motor elaborated the design of the motor electrical control circuit , elaborated motor main circuit and the electrical control circuit design process for the design of the user program , including utilities , manual procedures, semi-automatic process , and gives the program the ladder ; followed in the PC section explains the optimized cutting methods , optimization algorithm is given to prepare the corresponding optimization cutting program and verified .
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