# isometric pictorials

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Isometric Pictorials. Isometric Pictorials. Isometric means equal measure . Three adjacent faces on a cube will share a single point. The edges that converge at this point will appear as 120 degree angles or 30 degrees from the horizon line. - PowerPoint PPT Presentation

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Isometric Pictorials

Isometric PictorialsIsometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 20071Isometric means equal measure.Three adjacent faces on a cube will share a single point. The edges that converge at this point will appear as 120 degree angles or 30 degrees from the horizon line.These three edges represent height, width, and depth.Isometric Pictorials

120012001200121110123457869Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 20072Demonstrate to the students that if they use quad rule graph paper, they can approximate the 120 degree angle by counting over two go up one. Good sketching requires a sense of proportion, and the ability to estimate size, distance, angles, and other spatial relationships.Proportion and Estimation

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 20073The Box MethodThe box method is a technique used in sketching to maintain proportionality. It starts with a sketcher envisioning an object contained within an imaginary box.

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 20074Note: You may have a different approach on teaching sketching. Teachers may prefer to use the board or an overhead when explaining the technique. You may have students follow along step by step on a sketch.Step #1:Layout the box within which the isometric view will occur using points and construction lines.Isometric Sketching

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 20075Make sure the construction lines are light. Step #1: Constructing The Box

Locate corners of the maximum height and width of the box.

Connect the dots with light construction lines. Be sure to extend your lines past the corners

Locate the back corner of the top surface

Finish by connecting the dots with light construction lines. Be sure to extend your lines past the cornersTo find the angle of the depth and width count over two up one

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 20076Stress the importance of light construction lines when constructing the box and connecting the points.

Step #2:Use points and construction lines to identify surfaces that are not parallel to the faces of the box.Isometric Sketching

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 20077Step #2: Outside Faces

Identify where the corners of the surface would touch the box.

Using construction lines connect the dots

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 20078Step #3:Trace out the visible edges of the part with thick, dark object lines.Isometric Sketching

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 20079Step #3: Object Lines

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 200710Step #1: Constructing The Box6 units wide4 units tall4 units deepDetermine the overall dimensions of the object:Use points and construction lines to layout the box.

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 200711Again light construction lines.

Step #2: Outside FacesUse points and construction lines to identify the corners and edges of the object faces that occur on the surface of the box.

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 200712Step #2: Outside Faces cont.Before the sketch becomes too noisy with construction lines, trace out the visible edges identified thus far with object lines.

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 200713Step #3: Inside FacesUse points and construction lines to identify the corners and edges of the object faces that occur inside the box.

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 200714Step #3: Inside Faces cont.Trace out the remaining visible edges with object lines.

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 200715Step #4: Tonal ShadingDecide where the light source is coming from, and add tonal shading to two of the three views with parallel lines drawn closely together. Increase the contrast by cross-hatching the lines on the darkest face.

Isometric PictorialsIntroduction to Engineering DesignTMUnit 1 Lesson 1.2 Intro to Technical SketchingProject Lead The Way, Inc.Copyright 200716Tonal shading is a technique that helps enhance the sketch.