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Sketching Techniques. Purposes of Sketching. Think through a design look at it instead of just thinking about it Communicate your ideas let others look at what you are thinking Uses lines and symbols to describe a design it takes a lot of words to describe even a simple shape. - PowerPoint PPT Presentation

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Sketching Techniques

Sketching TechniquesSketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning Techniques 2011 Project Lead The Way, Inc.#Purposes of SketchingThink through a design look at it instead of just thinking about itCommunicate your ideas let others look at what you are thinkingUses lines and symbols to describe a design it takes a lot of words to describe even a simple shape

Draw a 3 horizontal lineDraw a 3 line extending from one end of the horizontal line at 45 degreesConnect the ends of the two lines with a third lineSketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesThere are several purposes for creating sketches. Sketches help you to think through a design. They also help you convey your ideas to other people for better understanding. Sketching is a language just like any other. The difference is that in sketching we use lines and symbols to describe the shape, size, and even the function of a design. 2011 Project Lead The Way, Inc.#Common Uses of Sketching Brainstorming ideasPiggy backing on variations

CommunicatePass on information

Document DimensionsSize of surfaces and features

Sketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesIn the engineering field, sketches are often used to brainstorm ideas and to solve problems. Many times they are used to communicate ideas to other people for better understanding or explanation of an object. Sketches are also used to document measurements taken in the field to be used back at the office. 2011 Project Lead The Way, Inc.#Advantages of SketchingConvenient

Inexpensive

How many words would it take you to describe this pair of pulleys?There would be a lot of assumptions and prior knowledge necessary for someone to be able to draw this from a verbal descriptionSketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesCreating and using sketches provides several advantages. Sketches are convenient and can be created almost anywhere, plus they are inexpensive. Few additional materials are needed. Only pencil and paper is required to create a sketch. 2011 Project Lead The Way, Inc.#Sketching Techniques #1Sketching a Line1)2)3)

Sketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesWhen sketching a line, first, plot the start and end points. Next, draw short line segments between the two points so that you have an idea of where the line will be drawn. Finally, darken the smaller lines so that one solid line appears between the two points. You will repeat the same process when drawing vertical or inclined lines. 2011 Project Lead The Way, Inc.#Sketching Techniques #1Lines (if you didnt have graph paper)

Vertical Line

Horizontal Line

Inclined LineRunRiseSketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesThere are some skills that we need to discuss, such as vertical lines, horizontal lines, plus inclined or slanted lines. To create any of the lines shown, it is important to plot or locate two points, the start and end points, before you attempt to draw the line. 2011 Project Lead The Way, Inc.#Sketching Techniques #1Sketching a Circle in 5 stepsThe lines in steps 1 5 should be thin and light (barely visible) Construction Lines

1) Set up the diameter

2) Square in the diameter

3) Sketch diagonals

Sketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesTo sketch a circle, you will complete a five step process. In step one, create a horizontal and vertical line the size of the desired diameter of the circle. Make sure the two lines intersect each other at the midpoints of the lines. For step two, sketch a square the size of the desired diameter. Make all horizontal and vertical lines the same length to ensure a true square shape. In step three, create diagonal or slanted lines connecting the four original diameter size marks together. 2011 Project Lead The Way, Inc.#Sketching Techniques #1Sketching a CircleThe lines in steps 1 5 should be thin and light (barely visible) Construction Lines

4) Identify triangle centers

5) Sketch arcs

Sketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesNow in step four, create a mark at the center location for each of the triangles. In the last step, sketch curved lines using the original diameter marks and the center marks just created to complete a perfect circle. 2011 Project Lead The Way, Inc.#Alphabet of Lines #2ConstructionObjectHiddenCenterSketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesThere are four main types of lines used when creating sketches. In the following slides, you will be shown each type of line and where it is used on a sketch. 2011 Project Lead The Way, Inc.#Alphabet of Lines

Construction LineSketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesConstruction lines are lightly drawn lines used as guides to help all other lines and shapes to be drawn properly. If you hold your paper an arms length away, you should not be able to see construction lines. They can even be erased after the object is sketched. 2011 Project Lead The Way, Inc.#

Alphabet of LinesObject LineSketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesObject lines are thick lines used to show visible edges of an object. In many situations, construction lines turn into object. 2011 Project Lead The Way, Inc.#

Alphabet of LinesHidden LineSketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesHidden lines are used to show interior details not visible from the outside of the object being drawn. In this part a hidden line is used to show a hole not visible from this side of the object. 2011 Project Lead The Way, Inc.#

Alphabet of LinesCenter LineSketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning TechniquesCenter lines are used to define the center of the arcs, circles, or symmetrical parts. They are drawn half as thick as object lines. In this example the center line is used to define or show the center of the hole in the object. 2011 Project Lead The Way, Inc.#Image ResourcesMicrosoft, Inc. (2008). Clip Art. Retrieved October 20, 2008, from http://office.microsoft.com/en-us/clipart/default.aspx

Sketching TechniquesGateway To TechnologyUnit 1 Lesson 1.4 Sketching and Dimensioning Techniques 2011 Project Lead The Way, Inc.#

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