Iso projection

The circle is completed by drawing arcs from these points. If some other arc is to be constructed, then the same method is to be adopted. This method of drawing isometric drawing is easy and intelligible. However, it takes much time for the drawing. For this purpose, isometric lines are drawn parallel to the isometric axis. After this, non-isometric lines, circles, and other curves are drawn.

Fabricators and manufacturers still delve in 2D CAD drawings to know part details, part information, assembly, and manufacturing process. And across the globe, industrial fabricators have adopted systems of specifying standards and symbols for mechanical CAD drafting. Popularly, we call them ISO or ASME standards or more technically, we refer them as 1st angle project method or 3rd angle projection method. Still there are divergent views between designers and manufacturers, when it comes to making a choice.

While drawing an object using 1st angle projection method, it gives you a feeling that you are making your drawings in an opaque box.

The catch here is the fact that the projection plane lies behind the object. This makes the designer look at the object and makes him sketch its front view at the back of the object. Alternatively, it can better be perceived as taking X-Rays of the objects, through the material and the output obtained is projected on the plane below or behind the object. This makes it difficult to understand and interpret the drawing since it involves heavy imagination and adjustment in drawings.

Since the projection plane is assumed to be transparent and in between the object and the observer, it gives a sense of putting the object flat on the drawing sheet or computer screen and traces the pencil or CAD jockey as the surface touches the drawing sheet or CAD interface.

The surface XYZ is an oblique surface in isometric. An object in isometric projection may be shown in eight different positions as shown in the Figure. Anyone particular position may be selected so as to illustrate all the important details of the object clearly.

However, the object will be drawn in isometric with its longest measurement either vertical or horizontal. The position in figure-B is known as an isometric projection with axis reversed is drawn when the underneath surface of the object is to be shown. If you like this article then please share it with your friends.

And also you can download the free PDF file of this article by clicking below. Email Address. Saif M. He completed his engineering studies in and is currently working in a large firm as Mechanical Engineer. He is also an author and editor at www. Notify me of follow-up comments by email. Notify me of new posts by email. This site uses Akismet to reduce spam. Learn how your comment data is processed. Hey, I am Krunal Rajput. The Man Behind CivilJungle. I started this site to spread knowledge about Civil Engineering.

I am a Degree Holder in Civil Engineering. Effectively concept explanation. Few more examples drawings are well appreciated as, it will help to clear the concept in depth. Your email address will not be published. Important Point. Isometric Projection Isometric projection is a method for visually representing three-dimensional objects in two dimensions in technical and engineering drawings.

Short Note.