Automation of a high temperature dyeing machine for woven fabrics

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Supervisor:
Dr. Stumpf Péter Pál
Department of Automation and Applied Informatics

The goal of my diploma thesis is to create the automated control system of an industrial fabric dyeing machine. It is an MCS Comby Jigger type dyeing machine, which was renewed in the early 2000s. It was supplied with a relay-based controlling mechanism and a primitive PLC which did the controlling of the rollers in the machine. In the meantime the PLC broke down and was unable to control the rollers properly, so the renewing of the machine became essential. In this process a new controlling system with much higher functionality then the old one was made.

The process is made of three bigger phases, the planning, the making and the testing of the system. The system itself is a complex multiple input, multiple output mechanism. With its help even a many hours long dyeing process can be lead with minimal human intervention.

The thesis heads through the planning process step by step, beginning with the description of the dyeing procedure, going through the presentation of the specific machine and the choice of the logic controller to the realization of the system.

The complete system at the end of the thesis consist of a Siemens S7-1200 PLC with an HMI TP 700 Comfort visualisation tool and the other extension modules needed for the duty. After the planning and completion of the adequate controlling structure, the screens of the HMI were created to help in the precise work procedure. At the end the obtained system was tested in the Tia Portal programing software with the help of a sample program. During the tests the outputs of the PLC were monitored and examined if they are working according to the expected, which they did.

Based on these it can be said, that goals of this thesis were accomplished. The system is ready to be built in, after which it will bring profit to the owner of the machine in terms of quality and expenses.  

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