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ME104: Computer-Aided Design (CAD)

Unit 2: Introduction to CAD Two-Dimensional Modeling   *Now that you understand the basics of design, it’s time to enlist the assistance of computer software to make the drawing process more efficient.  Computer-aided design, or CAD, has become a staple of the engineering world.  CAD programs allow you to create quick, detailed, precise sketches of whatever machine or part you want to model.  Once you become proficient in a specific program, you will be a great asset for any company.  Having a strong working knowledge of CAD will open doors for you as an professional engineer; with it, you can present not only a written description of your idea but a visual representation as well.

This unit will introduce you to the basics of computer-aided design.  You will use T-FLEX CAD, which is freely available software that is comparable to other modeling software like SolidWorks, ProEngineer, and AutoDesk Inventor.  You will learn how to navigate the program and create basic 2D models.*

Unit 2 Time Advisory
This unit should take you 39 hours to complete.

☐    Subunit 2.1: 5 hours

☐    Subunit 2.1.1: 2 hours

☐    Subunit 2.1.2: 2 hours

☐    Subunit 2.1.3: 1 hour

☐    Subunit 2.2: 4 hours

☐    Subunit 2.3: 13 hours

☐    Subunit 2.3.1: 1.5 hours

☐    Subunit 2.3.2: 1.5 hours

☐    Subunit 2.3.3: 1 hour

☐    Subunit 2.3.4: 1 hour

☐    Subunit 2.3.5: 2 hours

☐    Subunit 2.3.6: 1.5 hours

☐    Subunit 2.3.7: 1 hour

☐    Subunit 2.3.8: 1 hour

☐    Subunit 2.3.9: 1.5 hours

☐    Subunit 2.3.10: 1 hour

☐    Subunit 2.4: 11 hours

☐    Subunit 2.4.1: 1 hour

☐    Subunit 2.4.2: 1 hour

☐    Subunit 2.4.3: 1.5 hours

☐    Subunit 2.4.4: 1 hour

☐    Subunit 2.4.5: 1 hour

☐    Subunit 2.4.6: 1 hour

☐    Subunit 2.4.7: 2 hours

☐    Subunit 2.4.8: 1 hour

☐    Subunit 2.4.9: 1.5 hours

☐    Subunit 2.5: 6 hours

☐    Subunit 2.5.1: 1 hour

☐    Subunit 2.5.2: 1.5 hours

☐    Subunit 2.5.3: 1 hour

☐    Subunit 2.5.4: 1 hour

          ☐    Subunit 2.5.5: 1.5 hours

Unit2 Learning Outcomes
Upon successful completion of this unit, students will be able to:

  • Create 2D sketches and parts using CAD software (T-FLEX CAD).
  • Edit and modify 2D sketches and parts using CAD software (T-FLEX CAD).
  • Print and present 2D sketches and parts using CAD software (T-FLEX CAD).

2.1 Introduction and Installation   2.1.1 Introduction to CAD   - Reading: Wikipedia's “Computer-aided design” Link: Wikipedia's “Computer-Aided Design” (HTML)
 
Instructions: Read this introduction to computer-aided design, focusing especially on the “Overview,” “Uses,” and “Types” sections.
 
Terms of Use: This resource is licensed under a Creative Commons Attribution-ShareAlike 3.0 License. It is attributed to Wikipedia.

  • Lecture: YouTube: nptelhrd’s “Introduction to CAD” Link: YouTube: nptelhrd’s “Introduction to CAD” (YouTube)
     
    Instructions: Please watch this video lecture in its entirety and use this video to supplement the reading section.
     
    Note on the Lecture: This video lecture is presented by Dr. Anoop Chawla, Associate Professor in the Department of Mechanical Engineering at the Indian Institute of Technology.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.1.2 CAD Software: T-FLEX   - Web Media: YouTube: CADDIT.net’s “CAD CAM Design using T-FLEX 3D Software” Link: YouTube: CADDIT.net’s “CAD CAM Design using T-FLEX 3D Software” (YouTube)
 
Instructions: Please watch this video, which introduces you to T-FLEX CAD and its capabilities, in its entirety.

 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.
  • Reading: T-FLEX.com: Top Systems’ “Company Profile" Link: T-FLEX.com: Top Systems’ “Company Profile”  (HTML)

    Instructions: Please read the entire webpage to learn about Top Systems’ company history.  
     
    Note on the Text: This information is provided by the company Top Systems, which makes the software T-FLEX CAD.
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Reading: T-FLEX.com: Top Systems’ “T-FLEX CAD: What Is New in Version 11” Link: T-FLEX.com: Top Systems’ “T-FLEX CAD: What Is New in Version 11” (HTML)
     
    Instructions: Please read the content and familiarize yourself with the software.
     
    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.1.3 Downloading and Installing T-FLEX CAD   - Reading: T-FLEX.com: Top Systems' “T-FLEX CAD Student Edition Download” Link: T-FLEX.com: Top Systems’ “T-FLEX CAD Student Edition Download” (ZIP; EXE)
 
Instructions: If you have not already installed T-FLEX, please download and install the student version of this software via the link above.  You do not need to download the "Tutorial”, only the most recent build of the student edition.  You will use this software throughout the remainder of this course.
 
Terms of Use: Please abide by all terms of the End User License Agreement.  Note that you will have to register this product, free of charge, within thirty days of downloading it.  Special terms, system requirements, product limitations, and the EULA can all be viewed here: Terms, limitations, & system requirements.  Please respect any additional copyright and terms of use displayed on the webpages above.

2.2 Getting Started with T-FLEX CAD   2.2.1 Brief Introduction to Two-Dimensional Design   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Brief Introductory Course” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Brief Introductory Course” (ZIP; PDF)
 
Instructions: If you have not already downloaded and saved the T-FLEX CAD 2D Design manual (T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual), please select the appropriate FTP link from the webpage above to download and unzip the file.  You will use this resource throughout this unit.  Go to page 47 of the manual, and read “Brief Introductory Course.”  This resource combines reading and hands-on work.  After you read “Brief Introductory Course,” please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: The information provided here will help you to get started with creating 2D sketches and parts on the software pretty quickly.  You will continue to use this manual throughout this unit.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.2.2 Two-Dimensional Parts   - Reading: CADDIT.net: “2D Detailed Drawing” Link: CADDIT.net: “2D Detailed Drawing” (HTML)
 
Instructions: Please click on the hyperlink above to go to the CADDIT.net website.  Thereafter, click on the tab “Support” from the menu at the top of the webpage, and choose “T-FLEX CAD Tutorial” from the drop down menu.  This will open a tutorial titled “2D Detailed Drawing.”  Please read this entire tutorial.
 
Note on the Text: This information is provided by the company CADDIT.  This content will help you understand how 2D detailed drawings are created.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.3 Basic CAD Drawing   2.3.1 Drawing Basic Terms   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Drawing Basic Terms” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Drawing Basic Terms” (PDF)
 
Instructions: Please go to page 32 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual, and read the “Drawing Basic Terms” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand the basic terms used in CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.3.2 Drawing Techniques   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Drawing Techniques” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Drawing Techniques” (PDF)
 
Instructions: Please go to page 36 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual, and read the “Drawing Techniques” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand the various drawing techniques used in CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.3.3 Drawing Lines   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Lines” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Lines” (PDF)
 
Instructions: Please go to page 188 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the “Lines” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text:This content will help you understand how to construct and create lines using T-FLEX CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.3.4 Drawing Circles   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Circles” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Circles” (PDF)
 
Instructions: Please go to Page 205 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the “Circles” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text:This content will help you understand how to construct and create circles using T-FLEX CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.3.5 Drawing Ellipses   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Ellipses” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Ellipses” (PDF)
 
Instructions: Please go to page 218 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the “Ellipses” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text:This content will help you understand how to construct and create ellipses using T-FLEX CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.3.6 Drawing Nodes   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Nodes” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Nodes” (PDF)
 
Instructions: Please go to page 224 of T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the “Nodes” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to construct and create nodes using T-FLEX CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.3.7 Drawing Splines   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Splines” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Splines” (PDF)
 
Instructions: Please go to page 233 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the “Splines” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to construct and create Splines using T-FLEX CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.3.8 Drawing Offset Curves   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Offset Curves” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Offset Curves” (PDF)
 
Instructions: Please go to page 238 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the “Offset Curves” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process
 
Note on the Text: This content will help you understand how to construct and create offset curves using T-FLEX CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.3.9 Drawing Paths   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Paths” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Paths” (PDF)
 
Instructions: Please go to page 248 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the “Paths” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to construct and create paths using T-FLEX CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.3.10 Drawing Graphic Lines   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Graphic Lines” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Graphic Lines” (PDF)
 
Instructions: Please go to page 238 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the “Graphic Lines” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to construct and create Graphic lines using T-FLEX CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.4 CAD Detailing   2.4.1 Hatches and Fill   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Hatches and Fills” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Hatches and Fills” (PDF)
 
Instructions: Please go to page 295 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the “Hatches and Fills” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to use Hatches and Fills to annotate/detail the CAD drawings.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.4.2 Dimensions   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Dimensions” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Dimensions” (PDF)
 
Instructions: Please go to page 311 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the “Dimensions” section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to use Dimensions to annotate/detail the CAD drawings.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.4.3 Dimension Parameters   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Dimension Parameters” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Dimension Parameters” (PDF)
 
Instructions: Please go to page 326 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Dimension Parameters" section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to use Dimension parameters to annotate/detail the CAD drawings.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.4.4 Text   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Text” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Text” (PDF)
 
Instructions: Please go to page 340 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Texts" section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to use text to annotate/detail the CAD drawings.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.4.5 Leader Notes   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Leader Notes” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Leader Notes” (PDF)
 
Instructions: Please go to page 371 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Leader Notes" section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to use Leader notes to annotate/detail the CAD drawings.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.4.6 Geometric Dimensioning and Tolerancing Symbols   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Geometric Dimensioning and Tolerancing Symbols” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Geometric Dimensioning and Tolerancing Symbols” (PDF)
 
Instructions: Please go to page 380 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Geometric Dimensioning and Tolerancing Symbols" section.   Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to use Geometric Dimensioning and Tolerancing Symbols to annotate/detail the CAD drawings.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.4.7 Roughness Symbols   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Roughness Symbols” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Roughness Symbols” (PDF)
 
Instructions: Please go to page 388 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Roughness Symbols" section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to use Roughness symbols to annotate/detail the CAD drawings.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.4.8 Section View   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Section View” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Section View” (PDF)
 
Instructions: Please go to page 395 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Section View" section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to use Section views to annotate/detail the CAD drawings.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.4.9 Chamfers   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Chamfers” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Chamfers” (PDF)
 
Instructions: Please go to page 404 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Chamfers" section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to use Chamfers to annotate/detail the CAD drawings.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.5 CAD Editing and Printing   2.5.1 Moving and Copying Drawing Elements   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Moving and Copying Drawing Elements” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Moving and Copying Drawing Elements” (PDF)
 
Instructions: Please go to page 433 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Moving and Copying Drawing Elements" section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to move and copy drawing elements in CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.5.2 Replacing Elements   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Replacing Elements” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Replacing Elements” (PDF)
 
Instructions: Please go to page 453 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Replacing Elements" section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to replace drawing elements in CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.5.3 Drawing Modification Via Dimensions   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Drawing Modification Via Dimensions” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Drawing Modification Via Dimensions” (PDF)
 
Instructions: Please go to page 456 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Drawing Modification via Dimensions" section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to modify drawing using dimensions in CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.5.4 Relations   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Relations” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Relations” (PDF)
 
Instructions: Please go to page 460 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Relations" section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to use relations in CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

2.5.5 Printing Documents   - Reading: Top Systems' T-FLEX CAD 2D Design user manual: “Printing Documents” Link: Top Systems' T-FLEX CAD 2D Design user manual: “Printing Documents” (PDF)
 
Instructions: Please go to page 647 of the T-FLEX Parametric CAD Fundamentals: Two-Dimensional Design User Manual and read the "Printing Documents" section.  Please practice these commands in T-FLEX CAD to help reinforce the learning process.
 
Note on the Text: This content will help you understand how to print documents in CAD.
 
Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.