Abdullah Ahmed

Benefits and limitations of using pictorial drawing techniques. (Unit 16 P2)

It is easy to know what the object will look like once the drawing has been finished. It is very easy and quick to draw. Pictorial drawings are very easy to understand, even by a non-competent person. Pictorial design also has a number of industrial uses. They are often included in engineering drawings to clarify details. Sometimes a pictorial drawing is shown in an exploded view to compare with other parts in the object. There are two types of pictorial drawings: isometric and oblique. An oblique pictorial is where it shows a straight on view of one of the objects faces, and the lines are drawn to a specific angle. Isometric material is where all three adjacent faces on a cube will share a single point and all the edges will converge at one point as 120 degrees.

However, not all the views of the object are shown, only three sides are shown. Because of this, all of the dimensions are not shown and some important details may be left out. Also drawing circles takes too much time. Some pictorial drawings frequently have distorted and unreal appearances. Some lines on a pictorial drawings are difficult to dimension and measure. The hidden portion of the object is not easily imaginable especially when the object is complicated. Even with these limitations, pictorial drawings are still used extensively for technical publications, to clarify machine and structural details that would be difficult to visualise through multiview drawing.