How to make isometric drawing in AutoCAD - Learncade

It looks like it's a 3D world out there - make this model, BIM - but make no mistake, it still needs an old-fashioned 2D draft. And, of course, the ultimate goal of any method you use is to accurately express your design and creation materials.

Isometric drawings are not real 3D drawings, they are made with 2D geometry but they look like 3D. Isometric drawing in AutoCAD can be created by bending the viewing angle 30 degrees for all sides in a 2D plane.

What is an Isometric Drawing?

A 2D isometric drawing created from isometric projection is a flat representation of 3D isometric projection. This method of drawing provides a fast way to create an isometric view of a simple design. Distances measured along the isometric axis are suitable for measuring. But since you’re drawing in 2D, you can’t expect to draw other 3D distances and areas, show objects from different views, or hide lines automatically. 

Before the advent of CAD, we created isometric drawings with our T-square (or drafting arm) and our faithful 30-60-90 triangle. But you can accomplish the same thing in AutoCAD - if you are know-how.

How to Make Isometric Drawings in AutoCAD

Now that you've learned how to enable Isodraft, change the draft plane and set it to your liking, it's time to start drafting. But before you get started, there are a few U.S. things you might want to know

In an orthographic draft, you may have a habit of using rectangle commands instead of drawing four lines or polyline sections. In Isodraft mode it makes sense to assume that the rectangular command will change to isometric and underline the current isoplane. It doesn't. This rectangle will draw as if you were still in orthographic mode, so you probably don't want to use it.

You also need to leave the circle and arch commands. If you need them in your isometric drawing, you need to use the Elysip command. But here's the catch… you need to type in the command line because you don't see the option you can access if you activate Alice (or in that case the menu bar) from the ribbon.

While in Isodraft mode, accessing Elixir from the command line will give you an additional option of Isocarl. Be sure to select it from the command line or dynamic input drop-down to force it into a true isometric ellipse according to the current isoplane.

Once you specify the isocorl you will be prompted to specify the midpoint, then the radius or diameter. You will notice that these prompts are different from the orthographic version of the ellipse.

We now know how to create isometric circles, but I assume that the arcs work the same way. That is, while in Isodraft, type the arc in the command line and you will get an Isork option. You will be wrong. Sorry.

The best way to create an arc is to make a complete circle (elliptical), then a line (the lifetime of which to apply), and a trim command drawn in a full circle for the required space arc.

Now that you know some of the tricks you need to successfully draft in isometric mode, give it a try. You never know when you'll be called to do this.

How to Create Isometric Drawings in AutoCAD

Isometric drawings are not real 3D drawings, they are made with 2D geometry but they look like 3D. Isometric drawing in AutoCAD can be created by bending the viewing angle 30 degrees for all sides in a 2D plane.

how to make isometric drawing in AutoCAD 

In this article, I will show you how to create isometric drawings in AutoCAD. I will use the geometry shown in the image above to illustrate this feature.

I have created a video to explain this tip, watch it here. If you prefer an article over a video, scroll down to continue reading the article.

Isometric drawing in AutoCAD 2014 and older versions:

Initially, you need to change your snap settings to isometric. Type DS on the command line and press Enter.

A Draft Settings window will pop up from this window and select the Snap & Grid tab and make sure the Isometric Snap Radio button is checked. Click OK to exit the Draft Settings window.

How to make isometric drawing in AutoCAD 1

Now make sure Ortho mode is turned on from the status bar, if it is not turned on press F8

How to make isometric drawing in AutoCAD 2

You can now select the isometric plane for your drawing by pressing the F5 key. The three isoplanes available for selection are the isoplane upper, right, and left.

Press the F5 key to activate the isoplane top and then select the line command and click anywhere in the drawing area to start the line. Point to the command line and type 5 then press Enter, repeat this process by changing the direction of the line to create a closed square as shown in image A below.

Press F5 again to change the isoplane to the right or to the left. Draw a line through the three corners of a 5 unit square of length from the startline command downwards.

Replace the isoplane by pressing the F5 key again and connect all three ends of the vertical line to form a complete cube. In the same way, you can make other isometric drawings as well.

Isometric drawing in AutoCAD 2015 and later versions:

With AutoCAD 2015 and later versions, the process of creating isometric drawings has been greatly simplified. You can start isometric drawing directly using the ISODRAFT option of the status bar.

How to make isometric drawing in AutoCAD 4

Click on the iShodraft icon on the status bar as shown in the image above and select the plane on which you want to draw your drawing by pressing the F5 key. The rest of the process is the same as above.

How to Get An Isometric View in AutoCAD

So far we have mainly discussed 2D isometric drafts in AutoCAD. But there is another group of autocode users who think of something different when it comes to isometric. 3D is one of the many preset scenes for designers to display their geometry.

One way to access this is through the model space viewport controls in the editor's left corner. Clicking on the middle item View View Controls will display a drop-down menu of preset views. It has choices for four different isometric views.

Also, you can choose to display your model in either parallel or perspective views. Below are three different representations of the same box. First, a custom parallel view, a SW isometric view, and finally, the same SW was shown in ISO perspective.

Another common way to view preset views and parallel/perspectives is to use the viewable (in the upper right corner). Using this, you can select only one of the "faces" or corners, which represent each of the four isometric views. Right-click anywhere on the ViewCube to display the Tools dialog.

So there you have it. The world of isometrics in AutoCAD is pretty simple once you know whether you’re talking 2D or 3D. One is just a way to view your 3D models and the other is also the tools, commands, and tricks used to create a 2D representation of a 3D object. 

Give the isometric drafting spin sometimes. This is a really fun way to draft and a great skill. And the more I enjoyed flipping the triangle around the draft board, the better I feel at AutoCAD.

Do you have questions related to isometric drawings? Let me know in the comments below.