Introduction to Computer Aided Drafting and Solid Modeling (ENS 209)

2023 Spring
Faculty of Engineering and Natural Sciences
Engineering Sciences(ENS)
Utku Seven,
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Formal lecture,Interactive lecture,Recitation,Studio work/practice,Group tutorial,Laboratory
Interactive,Learner centered,Communicative,Discussion based learning,Project based learning,Case Study
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ENS 209 is concerned with the basic and important principles in computer-aided drafting and design (CADD), and 3D solid modeling. Based on an understanding of engineering drawing, the course will further introduce the use of computers for 2D drafting and 3D solid modeling. Topics include: engineering drawing, tolerances, computer-aided technical drafting and design, geometric models and data structures, representation and manipulation of curves and surfaces and 3D solid modeling, and assembly modeling and analysis.


To teach the basic and important principles in computer-aided drafting and design (CADD), and 3D solid modeling. Based on an understanding of engineering drawing, the course will further introduce the use of computers for 2D drafting and 3D solid modeling.


  • Describe the design process and product life cycle,
  • Describe the advantages of using computers in design process,
  • Identify different technical drawings based on the projection system used,
  • Sketch the different views of a given 3D component,
  • Interpret drawings that include section views,
  • Assign dimensions and tolerances on the views correctly (properly),
  • Represent and manipulate free-form curves and surfaces,
  • Understand and draw sections and cutting planes,
  • Use conventional and geometric dimensions and tolerance to describe size, shape and geometric tolerances accurately on an engineering drawing,
  • Model 3D objects using solid modeling techniques,
  • Identify and apply dimensioning guidelines,
  • Interpret a technical drawing,
  • Develop assembly drawings using constraints,
  • Design for Assembly and Manufacturing (Design for X),
  • Work with a CAD software (Solidworks) to design an assembly and generate technical drawings of its components and assembly drawings,
  • Work effectively in a team to analyze a product (assembly) to dissect and design it using CAD software.


1. Understand the world, their country, their society, as well as themselves and have awareness of ethical problems, social rights, values and responsibility to the self and to others. 3

2. Understand different disciplines from natural and social sciences to mathematics and art, and develop interdisciplinary approaches in thinking and practice. 3

3. Think critically, follow innovations and developments in science and technology, demonstrate personal and organizational entrepreneurship and engage in life-long learning in various subjects; have the ability to continue to educate him/herself. 4

4. Communicate effectively in Turkish and English by oral, written, graphical and technological means. 2

5. Take individual and team responsibility, function effectively and respectively as an individual and a member or a leader of a team; and have the skills to work effectively in multi-disciplinary teams. 4

1. Possess sufficient knowledge of mathematics, science and program-specific engineering topics; use theoretical and applied knowledge of these areas in complex engineering problems. 4

2. Identify, define, formulate and solve complex engineering problems; choose and apply suitable analysis and modeling methods for this purpose. 3

3. Develop, choose and use modern techniques and tools that are needed for analysis and solution of complex problems faced in engineering applications; possess knowledge of standards used in engineering applications; use information technologies effectively. 4

4. Have the ability to design a complex system, process, instrument or a product under realistic constraints and conditions, with the goal of fulfilling specified needs; apply modern design techniques for this purpose. 4

5. Design and conduct experiments, collect data, analyze and interpret the results to investigate complex engineering problems or program-specific research areas. 3

6. Possess knowledge of business practices such as project management, risk management and change management; awareness on innovation; knowledge of sustainable development. 2

7. Possess knowledge of impact of engineering solutions in a global, economic, environmental, health and societal context; knowledge of contemporary issues; awareness on legal outcomes of engineering solutions; knowledge of behavior according to ethical principles, understanding of professional and ethical responsibility. 2

8. Have the ability to write effective reports and comprehend written reports, prepare design and production reports, make effective presentations, and give and receive clear and intelligible instructions. 4

1. Use mathematics (including derivative and integral calculations, probability and statistics, differential equations, linear algebra, complex variables and discrete mathematics), basic sciences, computer and programming, and electronics engineering knowledge to (a) Design and analyze complex electronic circuits, instruments, software and electronics systems with hardware/software or (b) Design and analyze communication networks and systems, signal processing algorithms or software 2

1. Applying fundamental and advanced knowledge of natural sciences as well as engineering principles to develop and design new materials and establish the relation between internal structure and physical properties using experimental, computational and theoretical tools. 1

2. Merging the existing knowledge on physical properties, design limits and fabrication methods in materials selection for a particular application or to resolve material performance related problems. 2

3. Predicting and understanding the behavior of a material under use in a specific environment knowing the internal structure or vice versa. 1

1. Familiarity with concepts in statistics and optimization, knowledge in basic differential and integral calculus, linear algebra, differential equations, complex variables, multi-variable calculus, as well as physics and computer science, and ability to use this knowledge in modeling, design and analysis of complex dynamical systems containing hardware and software components. 3

2. Ability to work in design, implementation and integration of engineering applications, such as electronic, mechanical, electromechanical, control and computer systems that contain software and hardware components, including sensors, actuators and controllers. 3

1. Formulate and analyze problems in complex manufacturing and service systems by comprehending and applying the basic tools of industrial engineering such as modeling and optimization, stochastics, statistics. 3

2. Design and develop appropriate analytical solution strategies for problems in integrated production and service systems involving human capital, materials, information, equipment, and energy. 2

3. Implement solution strategies on a computer platform for decision-support purposes by employing effective computational and experimental tools. 4


  Percentage (%)
Final 35
Midterm 40
Assignment 2
Participation 5
Group Project 15
Homework 3



Technical Drawing with Engineering Graphics, 14/E by Giesecke, Hill, Spencer, Mitchell, Dygdon, Novak, Lockhart & Goodman, Prentice Hall, ISBN-10: 0132729717

Engineering Design Graphics with Solidworks 2011, 1/e by Bethune, Prentice Hall, ISBN-10: 0132740508

Principles of CAD/CAM/CAE, 1/e by Lee, Prentice Hall, ISBN-10: 0201380366