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Computer-assisted production in teaching technology topics

Denis Rupnik (2013) Computer-assisted production in teaching technology topics. Diploma thesis.

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    Abstract

    The development of computers has a significant impact on all areas of human activity. If we compare the industrial craft between 50 years ago and today, we would quickly notice differences. The most notable difference is that, today there is less employees and much more machines controlled by a computers (robots). With the help of computer-controlled machines, we are able to work accurately and faster than it is possible with our own physical strengths and skills. This was the reason for the development of CAD/CAM (Computer Aided Design/Computer Aided Manufacturing). Accordingly, it is necessary to adjust the direction of education in computer-controlled machines. In Slovenian elementary schools, CAD/CAM is covered in the context of object design and technology in basic level, which is sufficient for the continuation of this topic in secondary schools. Here comes the big problem, because in the general sections of secondary schools (general high school ...), there is no object, either elective course, which cover some topics of CAD/CAM. So when the students finish general high school, and then enroll in technical-oriented faculty, they don’t have adequate background knowledge, thus professors losing valuable time lectures by explaining the basics. A major obstacle of teaching the CAD/CAM is need of high priced hardware and software. A simple hardware solution is to manufacture CNC lathe with two stepper motors, which controlled by the computer interface eProDas-Rob1. Software solution is the free software that is freely available online, which allows you to draw pictures, and transfer it into “a reality”. Given the fact that many users in educational institutions using Google SketchUp, it is reasonable to start with this program. To get to the moving stepper motors, it is necessary to program the user interface, which allows us the software Visual Basic. Like all NC machines, also a simple CNC lathe, must have user interface, which allows us to "contact" with the machine. The path of the image from Google SketchUp to Visual Basic is possible with exporting image to the DXF file, which allows us plug-in DXF Export SketchUp. From the DXF file, you can use the program LazyCam to generate G-code, which is generally known for NC machines. The resulting G-code must be entered in the user interface stepper motor, which has been programmed in Visual Basic. Described learning tool is good for teaching, as it covers a lot of learning objectives of secondary technical schools related to CAD/CAM, as well as general engineer - technological education.

    Item Type: Thesis (Diploma thesis)
    Keywords: design and technology education, CAD, CAM, CNC, Google SketchUp, DXF, Visual Basic 2008 Express Edition, LazyCam, eProDas-Rob1, software, user interface
    Number of Pages: 62
    Language of Content: Slovenian
    Mentor / Comentors:
    Mentor / ComentorsIDFunction
    izr. prof. dr. Slavko KocijančičMentor
    asist. David RihtaršičComentor
    Link to COBISS: http://www.cobiss.si/scripts/cobiss?command=search&base=50126&select=(ID=9729097)
    Institution: University of Ljubljana
    Department: Faculty of Education
    Item ID: 1668
    Date Deposited: 10 Sep 2013 14:26
    Last Modified: 10 Sep 2013 14:26
    URI: http://pefprints.pef.uni-lj.si/id/eprint/1668

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