1. IOT POLY ENGINEERING 2-19 November 29, 2010 Your drawing space is 10” wide by 7 ¼” high. Calculate the horizontal starting point and the vertical starting point for the 3-view drawings for the object below. The spacing between views is 1 ¼”. DRILL – 4 Minutes Technical Graphic Communication HSP VSP

2. 1. Add width of front view to width of right view. 2. Add the space we will put between: 1 ¼” 4” + 2” = 6” HORIZONTAL STARTING POINT 6” + 1 ¼” = 7 ¼” 3. Subtract from the total width. 10” – 7 ¼” = 2 ¾” 4. Divide by 2. Horizontal Starting Point = 1 3/8”

3. 1. Add height of front view to height of top view. 2. Add the space we will put between: 1 ¼” 2” + 2” = 4” VERTICAL STARTING POINT 4” + 1 ¼” = 5 ¼” 3. Subtract from the total height. 7 ¼” – 5 ¼” = 2” 4. Divide by 2. Vertical Starting Point = 1”

4. Vertical Starting Point is 1” Horizontal Starting Point = 1 3/8”

5. IOT POLY ENGINEERING 2-19 Get out your isometric graph paper sheets. REMEMBER – one of the characteristics of engineering is that they can think abstractly… Technical Graphic Communication

6. IOT POLY ENGINEERING 2-18 Isometrics are drawn with: –All object vertical lines are vertical –All object horizontal lines are drawn 30 degrees from the horizontal –All lines are drawn true size DRAWING ISOMETRICS Reminder Technical Graphic Communication

7. IOT POLY ENGINEERING 2-18 Technical Graphic Communication DRAWING ISOMETRICS Let each grid space = ¼” Start with the lead line

8. IOT POLY ENGINEERING 2-18 Front view is typically drawn first You must look at all views Technical Graphic Communication ISOMETRICS from ORTHOGRAPHICS Let each grid space = ½”

9. IOT POLY ENGINEERING 2-18 Front view is typically drawn first You must look at all views Technical Graphic Communication ISOMETRICS from ORTHOGRAPHICS Let each grid space = ½”

10. Complete Orthographic-to-Isometric #5-10 drawings. Include dimensions. Let each grid space = ½” Technical Graphic Communication CLASSWORK / HOMEWORK #7 – Missing Dimensions 1.5”.75”

11. SOLUTIONS

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