|Fritz EGGER GmbH & Co. OG|
Im Rahmen des Antrages der FRITZ EGGER GmbH & Co. OG
sollte ein Versuchsstand für Lehrlinge, der bereits von der Firma Egger gefertigt und elektrisch installiert wurde, programmiert werden. Diese Anlage soll den Ablauf einer Spanplattenkühlung in Kleinformat (ca. 3m Länge) demonstrieren um den Auszubildenden die Möglichkeit zu geben, die Abläufe besser verstehen zu lernen ohne in die laufende Produktion eingreifen zu müssen. In einem weiteren Schritt wurde die Anlage komplett visualisiert.
The partner and supporter of our diploma project is the Fritz EGGER GmbH & Co. OG in St. Johann in Tyrol.
The main process of our automated machine is to dry wood-plates, but in a lower size than in the company EGGER produces. The reason to build such a machine is to show the EGGER’s trainees the different parts and the process of such machines. The machine we mentioned was built 100% by engineers of the EGGER GmbH. Furthermore the wires and cables were installed by them. Our job was to program the automated process of the machine via PLC (programmable logic controller), to parameter the necessary components like the electronic-frequency-converters for the engines and to visualize the whole process on a touch panel. Another main part of our project was the implementation of safety-modules. The use of a small pneumatic system was also necessary to guarantee a smooth flow of the automated process.
The following paragraph will present some more information:
The PLC-unit from Siemens contains a CPU (central processing unit) and four external peripheries with I/O-modules that are connected via ProfiBus and ProfiNet. The electronic-frequency-converters for our engines, which are split in two specific series, were produced by two different companies (SEW and Lenze). These parts are also connected to the CPU by ProfiBus and ProfiNet. The safety equipment contains three emergency-stop-buttons, a safety-bumper, a safety door and two safety-light-curtains that are all connected to the safety-I/O-cards of the PLC. To visualize the process and allow the user to steer the different engines of the machine, the EGGER Company had installed a 12’’ touch-panel produced by Siemens.
The automated process of the machine can be described as following:
The user starts the machine and releases the automated-control via touch-panel. Then the plate can be put on the first conveyer-belt that moves it to the first rotator. There the plate is turned 180° until it reaches the second conveyer-belt. There the process is repeated and the plate moves to the third belt. In this step the plate moves into the storage-partition of the machine. Before storing the plate in the down-moving storage partition, the plate gets centred by the pneumatic system. To empty the storage (in case of switching off the machine or a full storage) the user has to open the safety-door and empty it manual. After closing the door, the machine references to its start-position by itself. A local-mode for turning motors by tipping the start button is integrated in the program.