MPS – modular production system Learning system for automation - The Gifhorn arrangement 1. Description of the function Distributing station Touch Panel for order management Sorting station Distribution center Distributing station Robot station Sorting station Positioning axis with gripper Distributing station Sorting station Picture 2: MPS arrangement of the BBS II Gifhorn Picture 1: The MPS concept of Gifhorn The MPS arrangement represents an industrial plant, from the order, over the production, up to the distribution. The system produces small plungers of three different versions, the red, the black, and the metallic plungers. At the distributing station first, the different cylinders are carried by a swiveldrive from a magazin to the subsequent station. At this station, the separating station, cylinders are Picture 2: The product. Three versions of plunger sorted according to the colour and put down on three different slides. At the order management you can enter the customer’s order. A gripper takes the right cylinders and carried them to the robot- station by a positioning axis. The robot assembles the cylinder, the piston, the clip and the cylinder cover. After assembling, the gripper takes the workpiece and carried it to the distripution center. The gripper put it on a special numbered place in the store, the slides 1 – 6. Picture 3: Order management The Distributing Station for teaching the basics “The Distributing station separates workpieces. Up to eight workpieces are stored in the magazine tube of the stacking magazine. A double-acting cylinder pushes the workpieces out one at a time. The Changer module grips the separated workpiece via a suction gripper. The swivel arm of the changer, which is driven by a rotary actuator, moves the workpiece to the transfer point of the downstream station. Special technology: Semi-rotary actuator The Distributing station utilises various actuators, all of which Picture 4: Distributing station are industrial components. The rotary actuator of the swivel . arm can be set to various angles between 90° and 270° The end positions are sensed by means of micro switches. A double-acting linear cylinder pushes workpieces out of the stacking magazine. The end positions are sensed using proximity sensors. Special grippers: Suction gripper The suction gripper of the Changer module grips the workpiece. The vacuum is generated in the vacuum slice of the CP valve terminal by means of the venturi principle and is monitored by a pressure switch. The switching point of the pressure switch is adjustable.” (www.festo-didactic.com) 2. Didactic thoughts The MPS arrangement of the BBS II Gifhorn comprehends some special didactic thoughts. Diffrent technologies We are able to teach different technologies with our MPS. The different station are programmed with programmable controller. We used the Siemens program Step 7 with continious function chart. It is also possible to network with AS Interface on the sensor- actor level or to network with PROFIBUS between the controllers of the different stations. Modular composition The modular character of the MPS offers us to teach automation from the basics to higher qualification. At first we begin only with the distributing station. After that we are able to make it more complex when we connect the distributing station with the sorting station. At special themes we can teach robotics and the positioning axis. At last we can have a look at the whole MPS under the aspect of the network. Because of this modular arrangement we are able to use the MPS for diffrent grades of apprentice and also for diffrent professions like mechanics or electricians. Learning by doing The distributing station is ordered pluggable, so the studendts are able to build the System by their own. They have to create the technical documentation, they have to place sensors and actors and they have to program by their own. From the beginning they have to learn by their own fault. Work- same assignement Picture 3: Student are building the distributing station Work-same assignement In order to organize the learning process effectively we arranged the system with many stations, which are identical in construction. We ordered the distributing station six times, because we need it for the basics. The sorting station we ordered three times for the connecting with the distributing station for the constitutive learning process.
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