What are Axonometric drawings ?





See below for instuction on creating an isometric circle
Axonometric drawings are the most commonly used amongst all pictorial drawings.

Pictorial drawings are used to illustrate the an object in 3D.

Pictorial objects are 3-dimensionally drawn using 3 axes. The only rule is that the angles which make up an axonometric object total 120°.

The division of axes angles do vary and as a result produce other member of the axonometric family which we'll discuss later.

Current advancement in CAD softwares make producing Axonometric drawing as simple as drawing a line and clicking a view icon to select an oriention of view.

One of the basic fundamental of reading and detailing residential house plans and light commerical blueprints, is understanding how to interpret orthorgraphic views pictorial drawings is paramount.

Now lets begin with...

Isometric

Isometrics commonly referred to as 3d, is a member of the Axonometric drawings family.

Isometric objects are created using the three axes mention earlier view diagram. Isometric axes are divided equally in three 60° angles.

The equal axes allow the object created in isometric to have three surfaces which do not appear distorted or uneven.

The dimensions of an Isometric object isn't foreshortened

For this reason, isometric drawings are the most used axonometric drawing.

Learn steps on how-to create an Isometric shape includes a circle. This can be accomplished using both manual drafting techniques and computer aided design (CAD) softwares.

If you choice to do this exercise with a CAD software view instruction on how to configure AutoCAD to do the same.

Sketching or Drafting an Isometric objects


It's important to undertsand how an isometric object is created. To assist in the general understanding of view, I'm going to use a compass.

The starting point of a isometric object is at its axes view diagram.

Each of these axes represent one of the surfaces which create an object.

  • First
  • you will have to draw all the surface which are parallel to the South-West (SW) plane

  • Secondly
  • you will add deep to the object by creating surfaces on the South-East (SE) plane

  • Third
  • step is the simpliest, now just complete the overall shape by joining the lines of the object top view. These line will be drawn using the tgird axes.


    Great! all finished, now let draft the isometric circle.

    Object shown on the any of an three sufaces of an isometric shape for example a circle, appear distorted. This why a cirle appears as an ellipse.

    Ok, lets complete this object.

    On the SW plane of the object, create a box. This rectangle establishes the limit of the Isometric Circle to be drawn.

    Creating Isometric Circle Step 1

    Now, just of to the side of this Isometric object create a copy of the square--at 90° on the X,Y axes--you just drew on the isometric object by extracting its dimensions using a spring bow compass if you're doing this exercise manually. Divide the square horizontally into as many segment as you prefer.... but 8 to 10 segments would be ideal in most cases.Then number each line as shown from 1 to 8. Using a springbow compassinscribe a circle in the using the square as it boundries.



    Creating Isometric Circle Step 2

    Divide the square horizontally into as many segment as you prefer.... but 8 to 10 segments would be ideal in most cases.Then number each line as shown from 1 to 8. Using a springbow compassinscribe a circle using the square as its boundries.



    Creating Isometric Circle Step 3

    Now you can transfer the circle to the isometric face by measuring betweenthe red point shown --in step 2 at segment 1-- and the perimeter of the insribed circle at segment 1 also.Repeat this until all the point are filled in as shown in step 3.



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