The Study And Application Of The Key Producing Techonology About Colour Precoated Steel

The technology of color coating line is based on the metal-lurgical industry, chemical industry and manufacturing. It is the synergetic application of the technology in these three industries . The driving motion control technology is the basic and important technology of the system.By researching the features of motor torque control and motor speed control in the system, the paper present the methods of tension control and tension compensation of winder and accumulators, the loads balance of speed rollers, and the adjustment to accumulator in order to synchronize the speed of different segment.In order to control the overhang line of steel belt in the heater by PID controller , the method of OFF-LINE PID PARAMETERS CALCULATION is applied. DDE is used to transfer the sampling data and the computed parameters as a result between PID parameters calculating program and RSLinx which is the monitor of running PLC in realtime. The PID parameters calculating process is programed with MATALAB Languge and is called in WIN32 API programs by using the interface to C Language. This method decrease the time of adjusting PID parameter and makes it possible to reduce the vibrating of steel belt.