AutoCAD 2D_I Module 3: Freehand Pictorial Sketching

Module Objectives After the completion of this module, the student will be able to: 1.Identify the importance of freehand pictorial sketching. 2.Correctly produce good quality freehand pictorial sketches.

Introduction

Freehand sketching is a very important skill in Design and Graphics that everyone can improve. Sketches can transfer ideas, instructions, and information in a clear and concise way however; this requires the sketches to have the same proportions as the original drawing/object. An example is shown in the next figures.

Introduction Freehand Sketching Drawing using Tools

Sketching

Sketching requires drawing freehand straight lines that are nearly straight. To draw a nearly straight line from one point (A) to another (B). With the pencil on point A, look to the point B then draw the line as shown below

Sketching Don’t look at the pencil point. Look to the point where you are going to. Your line should be as straight as the one shown below

Five stages sketch an object in good proportions

Activities

Practical Task 1Practical Task 2 Next

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Isometric Projection

Isometric drawings are drawn with the aid of a 60/30 set square and a tee square. Isometric drawings are constructed using lines at 30° to the horizontal and vertical lines as shown in the next figures. Next Figures

Isometric Projection Note: isometric drawings use the same stages as sketching Always start by faintly drawing the three axes of the component with the 60/30 set square. Make off the height, width and length along the appropriate axis. Fig. 3.5 a. Complete the box that will contain the finished object. Fig. 3.5 b. Still using feint lines build in the shape required. Fig.3.5 c. Finally line in with a more bold line type. Fig. 3.5 d. Figures

Isometric axis Final Drawing Isometric Projection Back

Activities

Practical Task 3Home works Next

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Home wrok Home work 1Home work 2 Back

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