Computer-Aided Design (CAD)

Purpose of Course  showclose

CAD, or computer-aided design, is a powerful modeling tool that technical professionals use.  With CAD, architects can draw up building plans and engineers can develop component and system designs.  Some CAD programs even allow users to perform stress analysis, demonstrating how well a proposed structure will fare when put to use.  For example, when does a load become too big?  How much weight can be put onto a bridge before it becomes structurally unsound?  Using CAD, professionals can create precise engineering drawings in both 2- and 3-D, complete with dimensions and specifications, in a neat and readable format.  This modeling method has taken design to a whole new level of efficiency and accuracy.

We are fortunate to be engineers working in the current era—one of computers, technology, and ease of precision.  Without CAD, we would have to draft (or draw up) design blueprints by hand, which can be tedious and time-consuming.  With CAD, however, we can generate accurate 2-D and 3-D drawings, scaled as needed, with less effort and less time.  Computer-aided design also provides us with a number of other benefits.  For example, computer-generated drawings can be saved for future editing so that engineers needn’t completely redraw them.  Using CAD, engineers can model 3D parts and then fit them together in an “assembly” view so that they can see beforehand how their products will look.  Users can also rotate these technical drawings in order to view them from any desired perspective.

This course will introduce you to the process of modeling 2- and 3-D objects with computer-aided design.  Because all mechanical engineers should know how to draft by hand, however, we will learn the basics of drafting as well.  The class will wrap up with a CAD project in which you will select a mechanism—an ice cream scoop or a can opener, for example—and model it on your computer.  You will need to take precise measurements and utilize the skills and navigation tools you have learned throughout the course as well.

Note: In this course, you will work extensively with Top Systems’ T-FLEX CAD software.  Before beginning this course, please download this free software package according to the instructions below.

To download and install Top Systems’ free T-FLEX CAD Student Edition software, please select the link below and follow the instructions on the download page.

T-FLEX CAD Student Edition Download

You will also need to download and save the first two user manuals (PDF), “2D Design” and “3D Modeling”, both of which are available via the link above. You will use these manuals extensively in units 2 and 3. You do not need to download the “Tutorial” software or the additional manuals.

Please abide by all terms of the End User License Agreement. 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 at the link below.

Terms, limitations, & system requirements

Learning Outcomes  showclose

Upon successful completion of this course, students will be able to:

  • Describe the design process and basic CAD practices for engineering design and drawing.
  • Identify CAD representations like orthographic projections, 3D modeling, and section views.
  • Identify and use CAD annotation and presentation skills like dimensioning, tolerance, and assembly drawings.
  • 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).
  • Model basic and advanced 3D parts using CAD software (T-FLEX CAD).
  • Edit and modify basic and advanced 3D parts using CAD software (T-FLEX CAD).
  • Create 3D assemblies using CAD software (T-FLEX CAD).
  • Create 2D projections from 3D models and assemblies and learn how to annotate projections.
  • Apply the skills attained from 2D and 3D modeling to design working drawings by using CAD software (T-FLEX CAD).

Course Requirements  showclose

In order to take this course, you must:

√    Have access to a computer

√    Have continuous broadband internet access

√    Have the ability/permission to install plug-ins or software (e.g. Adobe Reader or Flash)

√    Have the ability to download and save files and documents to a computer

√    Be able to download and install T-FLEX CAD

√    Have the ability to open Microsoft files and documents (.doc, .ppt, .xls, etc.)

√    Be competent in the English language

√    Have read the Saylor Student Handbook.

√    Have completed the Following Courses: ME101

Unit Outline show close


Expand All Resources Collapse All Resources
  • Unit 1: Engineering Graphics and Design  

    This first unit of the course will introduce you to the technical skill of drafting. We will cover the design process along with various design models. We will learn various methods of representing design like orthographic projections, pictorial sketches, and isometric projections. This unit will also cover other drawing representation techniques like section views, auxiliary views, and solid modeling. Finally, we will learn how to dimension and annotate the drawings with particular attention to the creation of working and assembly drawings.

    Unit 1 Time Advisory   show close
    Unit 1 Learning Outcomes   show close
  • 1.1 Introduction to Graphics and Design  
  • 1.1.1 Design Process  
  • 1.1.2 Design Model  
    • Reading: University of Plymouth: Sanjay Sharma’s “The Design Model”

      Link: University of Plymouth: Sanjay Sharma’s “Design Model” (PDF)

      Instructions: Please click on the link titled “DSGN131 Course Notes” to access the PDF file. Read section 1.2, “The Design Model.”

      Note on the Text: This PDF is by Professor Sharma of the School of Engineering at University of Plymouth. The content will help you understand the various design models used in designing a product or process.

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

    • Web Media: YouTube: MNTC CADD’s “Design Process Models”

      Link: YouTube: MNTC CADD’s “Design Process Models” (YouTube)

      Instructions: This video explains various design process models. Please take notes as you watch this brief video (about 3 minutes). Please use this video as a tool to reinforce learning.

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

  • 1.1.3 Types of Design Model  
    • Reading: University of Plymouth: Sanjay Sharma’s “Types of Design Model”

      Link: University of Plymouth: Sanjay Sharma’s “Types of Design Model” (PDF)

      Instructions: Please click on the link titled “DSGN131 Course Notes” to open the PDF file. Read section 1.3, “Types of Design Model.”

      Note on the Text: This PDF is by Professor Sharma of the school of engineering at University of Plymouth. The content will help you understand various types of design models.

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

  • 1.2 Representing Design  
  • 1.2.1 Multiview Sketches/Drawing  
    • Lecture: University of Texas Pan-American: Dr. Steven Crown’s “Multiview Sketches”

      Link: University of Texas Pan-American: Dr. Steven Crown’s “Multiview Sketches” (PowerPoint)

      Instructions: Select the third link, “Multiview Sketches", to download the PowerPoint file. Please carefully review the entire presentation.

      Note on the Lecture: This presentation is by Professor Crown of the Mechanical Engineering Department at the University of Texas Pan-American. This presentation will help you understand how multiview sketches are used to represent engineering drawings.

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

    • Web Media: YouTube: MNTC CADD’s “Multiview Drawings”

      Link: YouTube: MNTC CADD’s “Multiview Drawings” (YouTube)

      Instructions: This video explains Multiview Drawings. Please use this video to supplement the reading section. Watch this brief video in its entirety (3:56 minutes).

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

  • 1.2.2 Orthographic Projections/Drawing  
  • 1.2.3 Pictorial Sketches  
    • Lecture: University of Texas Pan-American: Dr. Steven Crown’s “Pictorial Sketches”

      Link: University of Texas Pan-American: Dr. Steven Crown’s “Pictorial Sketches” (PowerPoint)

      Instructions: Select the fourth link, “Pictorial Sketches", to download the PowerPoint file.  Please carefully review the entire presentation.

      Note on the Lecture: This presentation is by Professor Crown of the Mechanical Engineering Department at the University of Texas Pan-American.  This presentation will help you understand how pictorial sketches are used to represent engineering drawings.

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

    • Reading: University of Plymouth: Sanjay Sharma’s “Pictorial Drawing”

      Link: University of Plymouth: Sanjay Sharma’s “Pictorial Drawing” (PDF)

      Instructions: Please click on the hyperlink titled “Pictorial Drawing” under the “Lecture Notes” section for Term 1, Week 3.  Please read the entire PDF file. 

      Note on the Text: This PDF is by Professor Sharma of the school of engineering at University of Plymouth.  This content will help you understand how pictorial drawings are used to represent engineering drawings.

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

  • 1.2.4 Isometric Projection  
    • Reading: University of Plymouth: Sanjay Sharma’s “Isometric Projection”

      Link: University of Plymouth: Sanjay Sharma’s “Isometric Projection” (PDF)

      Instructions: Please click on the hyperlink titled “Isometric Projection” under the “Lecture Notes” section for Term 1, Week 4.  Please read the entire PDF file.  

      Note on the Text: This PDF is by Professor Sharma of the School of Engineering at University of Plymouth.  This content will help you understand how isometric projections are used to represent engineering drawings.

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

    • Web Media: YouTube: Stmodanstech's “Oblique/Isometric Views”

      Link: YouTube: Stmodanstech's “Oblique/Isometric Views” (YouTube)
       
      Instructions: Please watch this entire video (7:33 minutes).  This video explains oblique/isometric views.  Please use this video to supplement the reading section.

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

  • 1.2.5 Geometry and Constraints  
    • Lecture: University of Texas Pan-American: Dr. Steven Crown’s “Geometry and Constraints”

      Link: University of Texas Pan-American: Dr. Steven Crown’s “Geometry and Constraints” (PowerPoint)

      Instructions: Select the sixth link, “Geometry and Constraints", to download the PowerPoint file.  Please carefully review the entire presentation.

      Note on the Lecture: This presentation is by Dr. Crown of the Mechanical Engineering Department at the University of Texas Pan-American. This presentation will help you understand the role that geometry and constraints play in representing engineering drawings.

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

  • 1.3 Advanced Representation Methods  
  • 1.3.1 Solid Modeling  
    • Lecture: University of Texas Pan-American: Dr. Steven Crown’s “Solid Modeling”

      Link: University of Texas Pan-American: Dr. Steven Crown’s “Solid Modeling” (PowerPoint)

      Instructions: Select the fifth link, “Solid Modeling", to download the PowerPoint file.  Please carefully review the entire presentation.

      Note on the Lecture: This presentation is by Professor Crown of the Mechanical Engineering Department at the University of Texas Pan-American.  This presentation will help you understand how solid modeling is used to represent engineering drawings.

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

    • Reading: University of Plymouth: Sanjay Sharma’s “Introduction to 3D Parametric Solid Modeling”

      Link: University of Plymouth: Sanjay Sharma’s “Introduction to 3D Parametric Solid Modeling” (PDF)

      Instructions: Please click on the hyperlink titled “DSGN131 Course Notes.”  Read section 3.1, “Introduction to 3D Parametric Solid Modeling”.

      Note on the Text: This PDF is by Professor Sharma of the School of Engineering at University of Plymouth.  This content will help you understand how solid modeling is used to represent engineering drawings.

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

  • 1.3.2 Section Views  
    • Lecture: University of Texas Pan-American: Dr. Steven Crown’s “Section Views”

      Link: University of Texas Pan-American: Dr. Steven Crown’s “Section Views” (PowerPoint)

      Instructions: Select the eighth link, “Section Views", to download the PowerPoint file.  Please carefully review the entire presentation.

      Note on the Lecture: This presentation is by Dr. Crown of the Mechanical Engineering Department at the University of Texas Pan-American.  This presentation will help you understand how section views are used to represent engineering drawings.

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

    • Reading: University of Plymouth: Sanjay Sharma’s “Sections”

      Link: University of Plymouth: Sanjay Sharma’s “Sections” (PDF)
       
      Instructions: Please click on the hyperlink titled “DSGN131 Course Notes” to open the PDF file.  Read section 2.4, “Sections.”  
       
      Note on the Text: This PDF is by Professor Sharma of the school of engineering at University of Plymouth.  This content will help you understand how section views are used to represent engineering drawings.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

    • Web Media: YouTube: Progression Support’s “Section Views, Part 1"

      Link: YouTube: Progression support’s “Section Views, Part 1” (YouTube)
       
      Instructions: Watch this brief video, which explains sectional views.  Please use this video to supplement the reading section.

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

  • 1.3.3 Auxiliary Views  
    • Lecture: University of Texas Pan-American: Dr. Steven Crown’s “Auxiliary Views"

      Link: University of Texas Pan-American: Dr. Steven Crown’s “Auxiliary Views” (PowerPoint)
       
      Instructions: Select the seventh link, “Auxiliary Views", to download the PowerPoint file.  Please carefully review the entire presentation.
       
      Note on the Lecture: This presentation is by Professor Crown of the Mechanical Engineering Department at the University of Texas Pan-American.  This presentation will help you understand how auxiliary views are used to represent engineering drawings.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

    • Web Media: YouTube: Goengineer’s “Auxiliary View”

      Link: YouTube: Goengineer’s “Auxiliary View” (YouTube)
       
      Instructions: This short video explains auxiliary views.  Please watch this entire video and use this information to supplement the reading section.

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

  • 1.4 Drawing Conventions, Dimensioning, and Tolerance  
  • 1.4.1 Drawing Conventions  
    • Reading: University of Plymouth: Sanjay Sharma’s “Drawing Conventions”

      Link: University of Plymouth: Sanjay Sharma’s “Drawing Conventions” (PDF)
       
      Instructions: Please click on the hyperlink titled “DSGN131 Course Notes” to download the PDF file.  Read section 2.3, “Drawing Conventions.” 
       
      Note on the Text: This PDF is by Professor Sharma of the School of Engineering at University of Plymouth.  This content will help you understand the role drawing conventions play in representing engineering drawings.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 1.4.2 Dimensioning  
    • Reading: University of Plymouth: Sanjay Sharma’s “Dimensions” (PDF)

      Link: University of Plymouth: Sanjay Sharma’s “Dimensions
       
      Instructions: Please click on the link titled “DSGN131 Course Notes” to download the PDF file.  Read section 2.5, “Dimensions”.
       
      Note on the Text: This PDF is by Professor Sharma of the School of Engineering at University of Plymouth.  This content will help you understand the role dimensioning plays in representing engineering drawings.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

    • Web Media: YouTube: 2010ACAD’s “Dimensions”

      Link: YouTube: 2010ACAD’s “Dimensions” (YouTube)
       
      Instructions: Watch this entire video (8 minutes), which explains dimensions.  Please use this video to supplement the reading section.

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

  • 1.4.3 Tolerance  
    • Lecture: University of Texas Pan-American: Dr. Steven Crown’s “Tolerancing”

      Link: University of Texas Pan-American: Dr. Steven Crown’s “Tolerancing” (PowerPoint)
       
      Instructions: Select the tenth link, “Tolerancing", to download the PowerPoint file.  Please carefully review the entire presentation.
       
      Note on the Lecture: This presentation is by Dr. Crown of the mechanical engineering department at the University of Texas Pan-American.  This presentation will help you understand the role tolerance plays in representing engineering drawings.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

    • Reading: University of Plymouth: Sanjay Sharma’s “Tolerance”

      Link: University of Plymouth: Sanjay Sharma’s “Tolerance” (PDF)
       
      Instructions: Please click on the hyperlink titled “DSGN131 Course Notes” to open the PDF file.  Read section 2.6, “Tolerance”.
       
      Note on the Text:  This PDF is by Professor Sharma of the School of Engineering at University of Plymouth.  This content will help you understand the role tolerance plays in representing engineering drawings.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 1.5 Working Drawings, Assemblies, and Schematics  
  • 1.5.1 Working Drawings  
    • Lecture: University of Texas Pan-American: Dr. Steven Crown’s “Working Drawings”

      Link: University of Texas Pan-American: Dr. Steven Crown’s “Working Drawings” (PowerPoint)
       
      Instructions: Select the twelfth link, “Working Drawings", to download the PowerPoint file.  Please carefully review the entire presentation. 
       
      Note on the Lecture: This presentation is by Professor Crown of the mechanical engineering department at the University of Texas Pan-American.  This presentation will help you understand how working drawings are used to represent engineering drawings.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 1.5.2 Assemblies  
    • Reading: University of Plymouth: Sanjay Sharma’s “Assemblies”

      Link: University of Plymouth: Sanjay Sharma’s “Assemblies” (PDF)
       
      Instructions: Please click on the hyperlink titled “DSGN131 Course Notes” to open up the PDF file.  Read section 2.7, “Assemblies”.
       
      Note on the Text: This PDF is by Professor Sharma of the School of Engineering at University of Plymouth.  This content will help you understand how assemblies are used to represent engineering drawings.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

    • Web Media: YouTube: Xype Technologies’ “Assembly Drawings”

      Link: YouTube: Xype Technologies’ “Assembly Drawings” (YouTube)
       
      Instructions: This video explains assembly drawings.  Please watch this entire video (5:30 minutes).  Use this video to supplement the reading section.

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

  • 1.5.3 Technical Presentations  
    • Lecture: University of Texas Pan-American: Dr. Steven Crown’s “Technical Presentations”

      Link: University of Texas Pan-American: Dr. Steven Crown’s “Technical Presentations” (PowerPoint)
       
      Instructions: Select the fourteenth link, “Technical Presentations", to download the PowerPoint file.  Please carefully review the entire presentation.
       
      Note on the Lecture: This presentation is by Dr. Crown of the mechanical engineering department at the University of Texas Pan-American.  This presentation will help you understand how technical presentations are used to communicate engineering drawings and other design/technical information.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

    • Web Media: YouTube: Dr. Doug Cooper’s “How to Make a Technical Presentation”

      Link: YouTube: Dr. Doug Cooper’s “How to Make a Technical Presentation” (YouTube)
       
      Instructions: This video explains how to createtechnical presentations.  Please watch this entire video and use this video to supplement the reading section.
       
      Note on the Media: This video presentation is given by Dr. Doug Cooper, of the University of Connecticut Chemical Engineering Program.

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

  • 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   show close
    Unit 2 Learning Outcomes   show close
  • 2.1 Introduction and Installation  
  • 2.1.1 Introduction to CAD  
  • 2.1.2 CAD Software: T-FLEX  
  • 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  
  • 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  
  • 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  
  • 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.

  • Unit 3: Higher Level Techniques in CAD - Three-Dimensional Modeling  

    You are now familiar with the 2D capabilities of the CAD program (T-FLEX CAD) and know how to design basic 2D sketches and parts on your computer.  With this background, you will learn how to create 3D models from 2D sketches using various commands.  You will learn how to create projections of your designs in order to put together functional, working drawings or see how various parts will fit together in an assembly.  T-FLEX CAD will enable you to arrange these parts in such a way that you can see what the final, assembled product will look like.

    Unit 3 Time Advisory   show close
    Unit 3 Learning Outcomes   show close
  • 3.1 Introduction to 3D Drawing and Design  
  • 3.2 Basic Operations in 3D Modeling  
  • 3.2.1 Extruding 3D Parts  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling User manual: “Extrusion”

      Link: Top Systems’ T-FLEX CAD 3D Modeling User manual: “Extrusion” (PDF)
       
      Instructions: Please go to page 264 of T-FLEX Parametric CAD Three-Dimensional Modeling User Manual and read the "Extrusion" 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 extrude 3D parts in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.2.2 Rotating 3D Parts  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Rotation”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Rotation” (PDF)
       
      Instructions: Please go to page 264 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Rotation" 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 rotate 3D parts in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.2.3 Blending Edges of 3D Parts  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Blending Edges”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Blending Edges” (PDF)
       
      Instructions: Please go to page 310 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the “Blending Edges" 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 blend 3D parts in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.2.4 Blending Faces of 3D Parts  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Blending Faces”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Blending Faces” (PDF)
       
      Instructions: Please go to page 328 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Blending Faces" 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 blend faces of 3D parts in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.2.5 Lofting to Create 3D Parts  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Loft”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Loft” (PDF)
       
      Instructions: Please go to page 351 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Loft" 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 loft to create 3D parts in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.2.6 Sweeping to Create 3D Parts  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Sweep”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Sweep” (PDF)
       
      Instructions: Please go to page 368 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Sweep" 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 sweep to create 3D parts in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.3 Advanced Operations in 3D Modeling  
  • 3.3.1 Creating 3D Arrays  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Arrays”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Arrays” (PDF)
       
      Instructions: Please go to page 402 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Arrays" 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 create 3D arrays of parts in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.3.2 Creating 3D Face Taper  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Face Taper"

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Face Taper” (PDF)
       
      Instructions: Please go to page 454 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Face Taper" 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 create 3D face taper in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.3.3 Creating 3D Shells  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Shell”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Shell” (PDF)
       
      Instructions: Please go to page 480 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Shell" 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 create 3D shells in CAD.

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

  • 3.3.4 Creating 3D Springs  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Springs”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Springs” (PDF)
       
      Instructions: Please go to page 484 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and practice “Springs" section. 
       
      Note on the Text: This content will help you understand how to create 3D Springs in CAD.

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

  • 3.3.5 Creating 3D Spirals  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Spirals”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Spirals” (PDF)
       
      Instructions: Please go to page 489 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Spirals" 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 extrude 3D parts in CAD.

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

  • 3.3.6 Creating Threads  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Threads”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Threads” (PDF)
       
      Instructions: Please go to Page 494 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Threads" 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 create threads in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.3.7 Creating Holes  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Holes”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Holes” (PDF)
       
      Instructions: Please go to page 500 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Holes" 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 create holes in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.3.8 Creating 3D Welds  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Welds in 3D Model”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Welds in 3D Model” (PDF)
       
      Instructions: Please go to page 536 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Welds in 3D Model" 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 create 3D welds in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.4 3D Assemblies and Creating 2D Projections of 3D Models  
  • 3.4.1 Creating 3D Assemblies  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “3D Assemblies Creation”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “3D Assemblies Creation” (PDF)
       
      Instructions: Please go to page 550 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "3D Assemblies Creation" 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 create 3D assemblies in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.4.2 Creating 3D Assemblies Mates  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Mates and Degrees of Freedom”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “Mates and Degrees of Freedom” (PDF)
       
      Instructions: Please go to page 581 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "Mates and Degrees of Freedom" 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 create 3D assemblies mates in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • 3.4.3 Creating 2D Drawing of 3D Models  
    • Reading: Top Systems’ T-FLEX CAD 3D Modeling user manual: “2D Projections”

      Link: Top Systems’ T-FLEX CAD 3D Modeling user manual: “2D Projections” (PDF)
       
      Instructions: Please go to page 613 of T-FLEX Parametric CAD: Three-Dimensional Modeling User Manual and read the "2D Projections" 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 create 2D drawings from 3D Models in CAD.
       
      Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Unit 4: CAD Project  

    You now know the basics of technical drawingandhow to use a CAD programto create 2D and 3D sketches and models.  You are ready to create your own working drawings, both by drafting and with CAD.  Provided with the instructions for this project is an example that illustrates how to assemblea pulley from its component parts.  This example is meant to guide you through the steps of this project.  First, you will need to create a 3D model of each part using T-FLEX CAD.  This will require you to implement the techniques learned in Units 2 and 3.  Once you have modeled the parts, you will need to assemble them using T-FLEX CAD.

    Unit 4 Time Advisory   show close
    Unit 4 Learning Outcomes   show close
    • Activity: The Saylor Foundation’s “CAD Project”

      Link: The Saylor Foundation’s “CAD Project” (PDF), "Example Files" (ZIP)
       
      Instructions: Please download the PDF file linked above to access the instructions for this project.  The second link contains T-FLEX files for an example project; review these in T-FLEX CAD to assist you in your own, original design.  When you select the link, a dialogue box will open; select a location to save the compressed folder.  Once you have downloaded the folder, open it and follow any instructions to extract (decompress) its contents.  Please note that the individual files will open in the T-FLEX CAD software

      Terms of Use: Please respect the copyright and terms of use for Top Systems' T-FLEX CAD software and any other resources used to complete this project.

  • Final Exam