Engineering - Exam Papers - HL - Project - 2007

150 Marks

Design Brief

  1. Introduction

    There are many examples of machines which aid training in various sporting activities.

    Design a simple table tennis serving machine, to the general specifications outlined below, which will eject a ball periodically to a practicing player.

    The machine should:
    1. Be table mounted;
    2. Have a ball container with the capacity for at least 10 practice balls;
    3. Incorporate a mechanism to eject a ball periodically;
    4. Include an electronic indicator to signal when the feed container is empty.

    Presentation of the completed machine should ensure that:

    1. All main operating features are clearly visible without dismantling.
    2. The longest dimension of the model does not exceed 300mm (NOT INCLUDING THE BALL CONTAINER).
    3. Electric power does not exceed 9 volts.

       
  2. Design Process (40 marks)
    A design folio must be compiled which will detail your:
    1. Analysis of the given brief and investigation of possible solutions;
    2. Criteria for selection of your own individual solution and production drawings/plans;
    3. Testing and evaluation of your design solution;
    4. Special instructions, if required, regarding the testing of solution by examiner.

    Note: Computer-aided design (CAD) should be used where possible.

     
  3. Design Realisation (110 marks)

    Using appropriate materials, make the machine according to your own individual design plans. Computer numerical control (CNC) technology should be used, where possible, to support manufacture. You are required to manufacture and assemble all the parts, subject to the following guidelines:

    1. Standard components may be used to support the. assembly and interconnection of various pans;
    2. Re-cycling will be acceptable only in cases where a complex part cannot readily be made in the school. Unnecessary recycling will result in lost marks;
    3. Bought-in electronic solutions will result in lost marks;
    4. Adhesives, if used, should be applied sparingly.

    Marks are awarded as shown in marking scheme below.

     
  4. Project presentation
    Your completed project consisting of a machine and design folio, both clearly identified with your examination number, must be available to the visiting examiner.

    Marks are awarded for quality of presentation and finished appearance of both machine and folio.