Sketching freehand technical

What are the different types of freehand technical sketches ... 

Freehand technical sketching is the process of drawing technical images without the use of drafting tools such as a T square, a triangle, or a compass. 

FIGURE 4-3 Engineer s freehand technical sketches of a proposed new product. 

FIGURE Urk Engineers and designers use freehand technical sketching to record design ideas for products such as these light switch cover plates, bridge parts, and floor plan. 

FIGURE 4-5 No matter where you are, you can quickly use freehand technical sketching to record any idea that comes to mind. 

Freehand technical sketching can be divided into three types based on their use thumbnail, detailed, and presentation. 

A detailed sketch is a type of freehand technical sketch that provides detailed information about the object such as annotations (notes), dimensions, and shading. 

FIGURE 4-8 Three types of freehand technical sketches used by engineers and designers (a) thumbnail sketch (rough layout conveying ideas),... 

Visualizing is the ability to form a mental picture of an object. Freehand technical sketching is the process of recording that mental picture on paper. 

This is also known as scale. If an object is drawn to full size, it would have a ratio of 1 1 (read as one-to-one or full scale ). If the object is drawn at one-half the actual size, it would have a ratio of 1 2 (read as one-to-two or one-half scale ). When doing freehand technical sketching, an engineer may need to draw a shape at full scale while on the same paper drawing the same shape at one-half scale. By doing this, the engineer makes sure the two sketches are proportional (see Figure 4-10). 

You may be saying to yourself, I can t draw. My drawings never look right Freehand technical sketching is an important skill. It is a simple one to learn with the right amount of practice. If you follow these easy techniques, you will soon be able to create freehand technical sketches. 

Second, a major advantage of freehand technical sketching is that it can be done quickly. Practicing this skill will allow you to increase the speed at which you draw. This will give you the ability to clearly and accurately communicate your thoughts. 

Freehand technical sketching can be done anywhere. All you need is a no. 2 lead pencil or softer, eraser, paper (grid or plain), and a hard smooth surface. This is one reason why designers and engineers often carry clipboards or engineer s notebooks with them (see Figure 4-15). 

An engineer s notebook is usually a bound book with graph paper and lined paper with numbered pages and a place to write important information such as the name, date, and title of the sketch. This information should be written with an ink pen freehand technical sketches should be drawn in pencil. This book becomes a permanent record of the engineer s concepts and ideas (see Figure 4-16). 

Freehand technical sketching is often used to brainstorm ideas, document measurements, record procedures, and begin the design process for a new product. 

Freehand technical sketching can be used to quickly and accurately communicate ideas and concepts. 

Freehand technical sketching is an important skill used by engineers, designers, drafters, CAD operators,... 

There are three types of freehand technical sketching thumbnail, detailed sketch, and presentation. 

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