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How to complete your cad homework.

Models like this are common homework assignments for CAD students. Let's learn some skills to convert an isometric drawing into a 3D model. SOLIDWORKS is used, but these skills apply to any 3D CAD program.

Step 1: The Assignment

Convert the above image into a 3D CAD model

This model and image can be found in the GrabCAD Library . You won't need it though, because this tutorial will show you strategies to model hundreds of similar models on your own.

Step 2: It's Simple, but Complex

Ask anyone who makes CAD models for a living if this model is difficult, and they will laugh. This model can be made in minutes (once you have a year or two of modeling experience).

If you are just starting out, don't be discouraged. There is a lot of "stuff" going on in such a simple model. Many experienced users and instructors (mistakenly) assume you already know this information.

Let's consider some knowledge you need to solve this assignment:

·       What is the front view?

·       What does this part look like from other views?

·       What are the units of measure?

·       What (if any) assumptions need to be made?

Step 3: What is the Front View?

Generally, the front view provides the most information.

When an isometric view is show, the front, top, and right views are laid out as shown above.

A modern drawing will usually shown the three standard drawing views, and the isometric view. A "simple" part like this could be represented with a single view, but it is an uncommon drawing method now. This type of single view, isometric drawing was common decades ago when each view was drawn by hand.

In the above image a typical modern drawing is shown. This drawing is created using the Third Angle Projection method (common in the United States). Before creating a drawing, determine if you need to use Third Angle, or First Angle Projection (common in the rest of the world). Wikipedia has a great entry on the topic.

Step 4: Unit of Measure?

In the United States, inches are the standard. The rest of the world has unified on millimeters.

A drawing should state the units of measure, but remember that we're not dealing with a "real drawing" for assignments like this.

One method to determine the units is to imagine what this part might be used for, then look at the overall dimensions used. In the image above the overall dimensions are 110 wide by 45 deep by 62 high. Is this a part you can hold in your hand? Or is this a part which you can climb on? 1 inch = 25.4 mm. I'm 72" tall (1,829 mm). Can I hold this part? Or is it bigger than me?

Another hint to determine the units used can be found in how the dimensions are written.

For drawings in inches the following are true:

·       Dimensions smaller than 1" do not show a leading 0. There are no units above smaller than 1, but if there were (and inches were used) they would be displayed as .25 NOT as 0.25

·       Units larger than 1" will show a number of trailing zeros to indicate their general tolerance. This means a unit like 110 would be displayed as 110.0 or 110.00 or 110.000 depending on how tightly toleranced the dimension needs to be.

For drawings in metric units the following are true:

·       Units under 1 have a leading zero as a prefix. Therefore .25 would be displayed as 0.25 on a metric drawing.

·       Units of a whole value larger than 1 do not display trailing zeros. Therefore 110 would be displayed as 110. NOT 110.0

Based on the above guidelines it should be clear that metric units are used in the assignment.

If you use the wrong units to create your model, there are some options:

• Remake the model using the correct units. A model like this should not take more than an hour to produce. It will be even faster the 2nd time. And you need the practice.
• Insert a Scale feature at the end of your model to scale the model as needed. This is a terrible solution, but it is slightly better than having a model that is 25.4 times too big.
• Create (or find online) a macro which will scale every dimension in every sketch and feature as needed to produce a model of the correct size.

Step 5: Assumptions Needed?

There are some assumptions needed to complete this model. Can you identify them?

• Does the 60 mm wide opening on the bottom go all the way to the back of the part?
• Do The four Ø12 mm holes go through the part?

Ideally the callout (Ø12 X4 HOLES) would have a note to indicate they are THRU holes. But, since no information is provided to indicate a depth other than all the way through, we'll take an educated guess and make all holes and pockets go through the part.

Step 6: What About the Origin?

We've determined the correct unit of measure, and know what the standard drawings views are supposed to look like. The last piece of information needed before a model can be made is:

Where does the origin go?

The origin is the fixed point in the CAD system located at the intersection of the three primary reference plane (front, top, right). The origin has a coordinate position of 0,0,0 in the model space.

Where should the origin go?

This is a hard question to answer for two reasons.

• It varies with every model.
• It really doesn't matter (most of the time).

To resolve the first issue above, we'll focus only on this model.

To resolve the 2nd issue, there are a number of bad places to put the origin, and a number of better places to put it. But, even if you pick the wrong location, it is possible to add another origin to the model later. And sometimes you may want multiple origins (an example is using one for CAD modeling, but a different origin to indicate the part in CNC equipment).

In the image above I've indicated several locations that make sense for the origin. Which is "the best"? It really depends on a lot of factors which won't be covered until later in your schooling.

As a general rule, I put the origin in the middle of a symmetrical part. For my model, I used the location indicated by the dot in the center of the part directly over the 60 mm dimension.

Step 7: The CAD Model Recipe

Have you ever followed a cooking recipe? Many times there is a sequence to follow, but there are some steps which must be followed in the correct order.

CAD models work the same way. There are guidelines which should be followed for most models.

·       Add material, cut away material, add little details (i.e. fillets and chamfers).

·       Keep sketches simple. Don't try to make multiple features with a single feature.

·       Try not to start your model by sketching a rectangle.

·        There isn’t a “right way” to make a model, but there are better (and worse) ways.

·       Symmetrical parts should be centered on the origin.

Above are the seven steps I used to create this model. Notice I started with an "L" shape instead of a rectangle. I broke the rule about putting fillets last. But the drawing locates the four holes concentrically with the filleted corners, so that's how I made the model.

Is this the "Best" way to make the model? It does not matter. If the model is correct, easy to edit, and built in a logical sequence, an argument for it being wrong, or bad can't be made.

"What about feature count?" Some people are obsessed with feature count, I'm not. Especially for simple models like this. Reducing feature count usually leads to more complex sketches which perform multiple operations at once. This means the model is more difficult to edit later.

Reducing the feature count from 7 to 5 (image above) creates a more complex multi-profile sketch for the third step. If you are later asked to suppress (turn off) one or more of those individual cuts, the process would be more difficult when compared to the seven step example above where each cut is made with a separate feature.

Below is an image of the feature tree from the 7 feature model. For some models you may want to experiment with renaming these model features. Boss-Extrude2 can be vague. Naming it "V Shape" may make identification easier if you or someone else needs to edit the model later.

It will take some time to develop an eye for it, but creating a CAD model is all about breaking the part down into smaller, easy to make features.

Step 8: Checking Your Work

Making a model is a waste of time if the end result is incorrect. One way to prevent errors is checking your work as you create the model. Here's how I do it:

Have a copy of the drawing open while you work. This can be on another monitor, a printed sheet of paper, or in another program in the background. As I create a model from an image, I cross each dimension off the drawing to indicate it has been used. Here's an example:

You never know when you might need a previously crossed out dimension to help determine an unknown value with some simple math, so try to keep the values legible.

Step 9: Single Monitor?

Most of the work I do at home is done on a laptop with a single monitor. This leads to constantly using Alt + Tab to cycle between SOLIDWORKS and the drawing. One trick to see the drawing in SOLIDWORKS while creating it is to insert the drawing into the part you are making.

The above does not help with crossing off dimensions as they are used, but it reduces the chance of forgetting the value, or using it in the wrong location.

Here's what it looks like:

Even better is that as the CAD model is rotated, the image remains static so it can always be read:

Here's how to get a picture into your CAD model as shown above:

• DON'T use Tools - Sketch Tools - Sketch Picture. This is a great tool, but it place the image on a plane. The image will rotate with the model and be impossible to read at times.
• You can try to use Insert - Object. This often does not work correctly, and you'll be left with an icon representing the image instead of an image.
• To get it to work reliably, Open the image in a viewer or editing program, copy the image (i.e. Ctrl + C), then inside of SOLIDWORKS, paste the image (i.e. Ctrl +V).

Step 10: Bonus Points (and Fun)

Making CAD models should be fun. If not, you might be studying for the wrong profession.

When your 3D model is complete, and you've checked it for errors, make a rendering of it. Rendering an image makes it look much better by applying realistic materials, backgrounds, and lighting to and around the model.

Step 11: Cheating?

Can you cheat in a CAD class? Maybe. But, it can be difficult.

Chances are you are using an educational version of the software. This usually means you won't be able to open/import a model created in a commercial seat of the software. You could import a generic model like a Step, Parasolid, or Iges file, but those will import without a feature tree.

3D models are also tagged in their properties with the name of the person who created them. An easy to overwrite tag is located in File - Properties - Summary. This simply shows the login name of the last person to save the file.

Another user name and time stamp is added to every feature in the feature tree. Right click a feature and choose Feature Properties. The name and time of creation is saved there. If your instructor is smart (or they read this tutorial), they'll be able to easily spot a model made with another person's name.

Also consider that it is unlikely that two students would make this model in exactly the same way. There are so many variables from reference sketches, constraints, and face names, that two people having the same model is VERY unlikely. Models are like handwriting, or voices. They can be similar, but can be individually identified by unique characteristics.

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• Q 6 : CVEN 1025 3 Credit Lab 2 Lab Work: AutoCAD 2023 Instructor . Chapter 3 Exercises • Exercise 1, p62 • . • • Exercise 4, p53 • Complete circle exercise, save and submit labp4.DWG file. Exercise 5, 64 . • Complete horizontal line exercise, save and submitlabp5.DWG file. Exercise 8, p56 Submission Details: Denver IN THE CITY Complete horizontal line exercise, save and submit labp1.DWG file. AutoCAD Civil Engineering Graphics and Computer Aided Design Complete circle exercise, save and submit labpe DWG fle Exercise 9, p56 Complete horizontal line exercise, save and submit labp.DWG fle Exercise 12.56 Complete circle exercise, save and submit lab12.DWG fie • Using Polar Tracking, Polar Snap, and Dynamic Input p63 Complete exercise, save and submit ptrack-polarsnap.dwgfe . Submit to Canvas 6 AutoCAD Drawing Files (DWG) Textbook Chapters to Review: • AutoCAD 2023 Instructor . Chaplers 3 and 8/nCVEN 1025 001-3 Credits Autocad Introduction Homework Exercise 2: . Please complete the following problems from the text book Chapter 3 . 10 12 13 15 Chapter 8 Submission Details: . Submit to Canvas asa dwg enver MAIN THE CITY Textbook Chapters to Review: . Chapter 3 and 8. AutoCAD Civil Engineering Graphics and Computer Aided Design See Answer
• Q 7 : need a cad design for a jaw articulator Need to use autocad software and Need to send the model design only The image added is taken from INTERNET and is for reference purpose only yes, what we need to do is after you we need to send student 5-6 models example with website links and then student will confirm on whcin we need to work See Answer
• Q 8 : B00GG Wonder Care™ ADING REAKTION 720000 Wonder Care Deep Breathing Lung Exerciser | Washable & Hygienic I... Visit See Answer
• Q 9 : Ex. 1. Prepare a 3D model of an object 38 21 Computer Aided Design 36 3 14 58 84 Basics of 3D modelling 12 43 10 1 Ex. 2. Prepare a 3D model of an object 60 55 Computer Aided Design 10 50. 35 14 30 77 Basics of 3D modelling OF 20 18 30 2 Ex. 3. Prepare a 3D model of an object 40 0.9 91 36 Computer Aided Design 24 30 66 84 Basics of 3D modelling 18 26 37 1 3 Ex. 4. Prepare a 3D model of an object 45 26 15 Computer Aided Design 40 26 38 78 Basics of 3D modelling 15 16 26 4 20 Ex. 5. Prepare a 3D model of an object QF Computer Aided Design 8 30 50 45 50 60 R20 90 R15 Basics of 3D modelling 40 3 70 5 See Answer
• Q 10 : Homework Exercise 5: • Please complete the following problems from the text book. o Chapter 20 ▪ 5 o Chapter 21 1 ▪ 2 o Chapter 22 1 Chapter 30 1 Submission Details: • Submit to Canvas as a .dwg Textbook Chapters to Review: • Chapter 20, 21, 22, and 30. See Answer
• Q 11 : Homework Exercise 5: • Please complete the following problems from the text book. o Chapter 20 ▪ 5 o Chapter 21 1 ▪ 2 o Chapter 22 1 Chapter 30 1 Submission Details: • Submit to Canvas as a .dwg Textbook Chapters to Review: • Chapter 20, 21, 22, and 30. See Answer
• Q 12 : 1. Create 3 Circles and 2 Rectangles 2. Select all a. b. 3. Selects Similar a. b. c. Use the "selall" command Take a screenshot of selected objects Use the "selectsimilar" command 4. Group a. Use the group command b. Select your 3 circles c. Name this group circles d. Save the file as "lab5a" 6. Block Select one of your objects Take a screenshot of selected objects 5. Group Edit a. Use the groupedit command b. Remove one of the circles from the group c. Save the file as "lab5b" 7. Insert a. Use the block command b. Choose a base point and select the two rectangles c. Name the block rectangles a. Use the "-insert" command b. Insert the retangles block c. Save the file as "lab5c" 8. Xreference a. Open a new file b. Use the xreference command c. Select attach dwg d. Select your lab file lab5a.dwg e. Insert the file into your drawings at 0,0 wit a scale of 1 and rotation of 0 f. Save the file as "lab5d" See Answer
• Q 13 : Q1 Where can you choose the type of projection (First angle or Third angle) to use in a drawing? Question options: File properties. Document properties. Sheet properties Drawing properties. See Answer
• Q 14 : Q2 2 Top Plane 3 Right Plane 1 Front Plane Plane C Object 1. Plane A 2. Plane B 3. Plane C Hane B Plane A See Answer
• Q 15 : Q3 What is an oblique surface? Question options: A surface that is slanted in two different directions. An elongated surface. A curved surface. A surface that is slanted in one direction. See Answer
• Q 16 : Q4 For third-angle projections, the orthographic view is Question options: projected on a plane located between the viewer's position and the object. Projected on a plane located beyond the object. Projected on a plane to the left of the object. Projected on a plane under the viewer's position. See Answer
• Q 17 : Q5 For first-angle projections, the orthographic view is Question options: projected on a plane located between the viewer's position and the object. projected on a plane located beyond the object. Projected on a plane to the left of the object. Projected on a plane under the viewer's position. See Answer
• Q 18 : Q6 recedence of Lines: Order these types of lines by precedence in drawings, with lines taking precedence coming before lines they take precedence over. Questions options: _3__ Hidden Line ___1__Centerline __2__Solid Line See Answer
• Q 19 : 2. Layer Properties Manager and Linetype Manager A. Begin a New drawing and use Save to assign the name CH11EX2. Set Limits to 11 x 8.5, then Zoom All. Use the Linetype Manager to list the loaded linetypes. Are any linetypes already loaded? PICK the Load button then right-click to Select All linetypes. Select OK, then close the Linetype Manager. B. Use the Layer Properties Manager to create 3 new layers named OBJ, HID, and CEN. Assign the following colors, linetypes, and lineweights to the layers by clicking on the Color, Linetype, and Lineweight columns. OBJ HID CEN C. Make the OBJ layer Current and PICK the OK tile. Verify the current layer by looking at the Layer Control drop-down list, then draw the visible object Lines and the Circle only (not the dimensions) as shown in Figure 11-46. Red Yellow Green FIGURE 11-46 $1.50- Continuous Hidden2 Center2 1.00 5.00 -2.50 Default Default Default 1.25 L 2.50 -1.00 2.00 1.50 See Answer
• Q 20 : 4. Create a New BSHEET Template Drawing Complete this exercise if your system is configured with a "B" size printer or plotter. A. Using the template drawing in the previous exercise, create a template for a standard engineering "B" size sheet. First, use the New command. When the Select a Template File dialog box appears, locate and select the ASHEET.DWT. When the drawing opens, set the model space Limits to 17 x 11 and Zoom All. B. Activate Layout 1. Erase the existing viewport. Activate the Page Setup Manager and select the Modify button. In the Page Setup dialog box select a print or plot device that can use a "B" size sheet (17 x 11). In the Paper Size drop-down list, select ANSI B (11 x 17 inches). Close the dialog box and the Page Setup Manager. C. Make VPORTS the Current layer. Then use the Vports command and select a Single viewport and accept the default (Fit) option to create one viewport at the maximum size for the printable area. Finally, make the Model tab active. All other settings and layers are okay as they are. Use Saveas and save the new drawing as a template (.DWT) drawing in your working directory. Assign the name BSHEET. See Answer

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CAD Drawing Online

Get cad results without the cad hassles or expense, the easy choice for creating your cad drawings online, easy to use.

SmartDraw's CAD drawing software has the CAD tools you need to make scaled drawings of all kinds. Start with any of the built-in CAD templates and drag and drop symbols. You can set the size of walls or objects by simply typing into the dimensions label. You can also set the specific angle between two walls.

Easy to Find the Symbols You Need

SmartDraw includes a vast collection of mechanical engineering and architectural symbols for every type of CAD drafting project.

Easy to Draw and Print to Scale

SmartDraw lets you quickly select a common standard architectural scale, a metric scale, and more. You can print to scale just as easily. And your printed scale doesn't have to match your drawing's scale. You can easily change the scale at any time, even after you've started drawing. Keep track of your settings in a scale-independent annotation layer.

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SmartDraw is easy to work with no matter what other apps you use. You can add CAD drawings to:

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SmartDraw works hand in glove with most file storage systems. You can save your CAD drawings directly to:

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There is no need to create a parallel set of common folders and permissions, SmartDraw can just save files directly into your existing set up. You can spend less time managing software and more time on making CAD drawings.

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Share your CAD drawing with anyone, even if they don't own a copy of SmartDraw, with a link. You can also easily export any diagram as a PDF or common image formats like PNG or SVG.

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Have a question? Chat or email us. SmartDraw support is in-house and free!

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SmartDraw makes it easy to work with a team on any engineering or design project.

You can save your drawing to a shared folder or send anyone a link. Your team or client can easily share comments and feedback.

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Use SmartDraw's CAD drawing software to realize your vision and share the results.

Our CAD Drawing Software Features

• Floor plan templates
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• Export a manifest
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How to Create Your CAD Drawing Online

Pick a template.

Determine the type of diagram you're going to make. SmartDraw has templates for all kinds of floor plans to warehouses and offices.

SmartDraw also has templates for engineering diagramsincluding circuit diagrams, wiring diagrams, HVAC diagrams, piping diagrams, and more.

Take Measurements for Scaled Drawings

If you're making a scaled CAD drawing like a blueprint or floor plan, you'll want to start by taking measurements of any existing structures. If you're creating a new plan, brainstorm designs based on the size and shape of the location on which to build.

Draw Lines or Walls

Engineering diagrams like circuit diagrams will use lines and connect symbols that represent components like switches and fuses.

The foundation of most floor plans will be creating an outline of walls much like lines.

Find Symbols and Add Them

Find the symbols needed to create your design. Most engineering diagrams like HVAC and electrical drawings will have specialized symbols that represent components you need. These will be docked to the template you selected.

You can also search for symbols and easily drag and drop symbols to your drawing area and connect them.

Print or Share Your CAD Drawing

Once your drawing is finished you can insert it directly to Microsoft Word ® , Excel ® , PowerPoint ® , Google Docs ™ , Google Sheets ™ , and more.

SmartDraw also has apps to integrate with Atlassian's Confluence and Jira. You can share your design in Microsoft Teams. You can also easily export your plan as a PDF, PNG, SVG, or print it.

CAD Templates and Examples

SmartDraw comes with dozens of templates to help you create blueprints, landscape layouts, electrical schematics, mechanical drawings, block diagrams, facility plans, circuit diagrams, and more.

What is a CAD Drawing?

CAD stands for computer-aided design and drafting and it refers to designing and documenting technical specs and plans in various engineering fields.

CAD drawing does not have to be challenging to be effective. And you don't have to be tied to a PC to do it either. SmartDraw's CAD drafting software is uniquely powerful and easy to use. Get started quickly with templates and examples that are easy to customize. Bring drawings to life in minutes with powerful CAD drafting tools. Extensive, custom symbol libraries give drawings a professional finish. SmartDraw CAD drafting software produces presentation-ready results for both the beginner and the expert.

Frequently Asked Questions (FAQ) About CAD

CAD stands for Computer Aided Design (and/or drafting, depending on the industry). CAD usually refers to computer software used to create 2D and 3D models and designs such as architectural designs, building plans, floor plans, electrical schematics, mechanical drawings, technical drawings, and blueprints.

CAD drawings are used by architects, civil engineers, mechanical engineers, and construction professionals.

CAD drawings can include floor plans, blueprints, piping and instrumentation diagrams, HVAC, site plans, wiring diagrams, circuit diagrams, and other technical drawings. Learn more.

Traditional CAD software like AutoCAD is well-known for having a steep learning curve. CAD doesn't have to be hard. SmartDraw was designed to be more accessible and easier to use.

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