1. Project FUNDA Hear it Learn it Let’s make engineering more easy engineering108.com

2. Using Drawing Tools & Applied Geometry engineering108.com

3. TOPICS Preparation of Tools. Using of Tools Applied Geometry engineering108.com

4. Preparation of Tools engineering108.com

5. Fastening Paper to Drafting Board 1. Place the paper close to the table’s left edge. 2. Move the paper until its lower edge place about the top edge of T-square. engineering108.com

6. 3. Align the top edge of the paper with T-square blade. 5. Move T-square down to smooth the paper. 4. Attach the paper’s corners with tape. 6. Attach the remaining paper’s corners with tape. Fastening Paper to Drafting Board engineering108.com

7. 1. Remove the wood with penknife while expose a lead about 8-10 mm. 2. Polish the lead into a conical shape with a sandpaper. 3. Clean the lead with tissue paper. Sharpening the Pencil engineering108.com

8. Preparing the Compass 2. Adjust the needle and the lead so that the tip of the needle extends slightly more than the lead. 1. Sharpen the lead with a sandpaper. needle lead engineering108.com

9. Using the Tools engineering108.com

10. Straight line Arc, Circle 4. Circle template 1. T-square 2. Triangles 3. Compass Tools Shape to be drawn Function of the Tools engineering108.com

11. Using the Compass 1.Locate the center of the circle by two intersecting lines. 2. Adjust the distance between needle and lead to a distance equal to radius of the circle. 3. Set the needle point at center. engineering108.com

12. Start circle. 4. Start circle. Apply enough pressure to the needle, holding compass handle between thumb and index fingers. Complete circle 5. Complete circle. Revolve handle clockwise. Using the Compass engineering108.com

13. Using a Circle Template 1. Draw two perpendicular lines that pass through center of a circle to be drawn. Construction line Object line 2. Place the template till all marking coincide with center lines. 3. Tracing the circle. (Hold the pencil normal to the paper.) Given Center of a circle to be drawn engineering108.com

14. Draw a Horizontal Line 1. Press the T-square head against the left edge of the table. 2. Smooth the blade to the right. engineering108.com

15. Draw a Horizontal Line 3. Lean the pencil at an angle about 60 o with the paper in the direction of the line and slightly “toed in”. 4. Draw the line from left to right while rotating the pencil slowly. engineering108.com

16. Draw a Vertical Line 1. Set T-square as before. Place any triangle on T-square edge. 2. Slide your left hand to hold both T-square and triangle in position. engineering108.com

17. Draw a Vertical Line 3. Lean the pencil to the triangle. 4. Draw the line upward while rotating the pencil slowly. engineering108.com

18. Draw a line at 45 o with horizontal 2. Draw the line in the direction as shown below. 1. Place 45 o triangle on the T-square edge and press them firmly against the paper. engineering108.com

19. 1. Place 30 o -60 o triangle on the T-square edge and press them firmly against the paper. 2. Draw the line in the direction as shown below. Draw a line at angle 30 o and 60 o engineering108.com

20. 0 deg. 15 deg. 30 deg. 45 deg. 60 deg. 75 deg. 90 deg. =  30 + 45 deg Already demonstrated. = 30 + 45 deg Already demonstrated. Draw the lines at 15 o increment engineering108.com

21. A B Draw the line passing through two given points 1. Place the pencil tip at one of the points. 2. Place the triangle against the pencil tip. A B Given 3. Swing the triangle around the pencil tip until its edge align with the second point. 4. Draw a line. engineering108.com

22. Applied Geometry engineering108.com

23. To Bisect a Line 1. Swing two arcs of any radius greater than half-length of the line with the centers at the ends of the line. 2. Join the intersection points of the arcs with a line. (not to scale) A B r1r1 Given A B r1r1 3. Locate the midpoint. engineering108.com

24. To Bisect an Angle 2. Swing the arcs of any radius from the intersection points between the previous arc and the lines. 3. Draw the line. 1. Swing an arc of any radius whose centers at the vertex. (not to scale) r1r1 Given A B C A B C r2r2 r2r2 engineering108.com

25. To draw the line parallel to a given line and passes through a given point Given + C engineering108.com

26. To draw the line parallel to a given line and passes through a given point Given + C Repeat engineering108.com

27. To draw the line parallel to a given line with a specified distance Given distance = r r engineering108.com

28. r To draw the line parallel to a given line with a specified distance Repeat Given distance = r engineering108.com

29. To draw the line perpendicular to a given line at a given point + C Revolve method engineering108.com

30. + C To draw the line perpendicular to a given line at a given point Repeat Revolve method engineering108.com

31. To draw the line perpendicular to a given line at a given point + C Adjacent-sides method engineering108.com

32. + C To draw the line perpendicular to a given line at a given point Adjacent-sides method Repeat engineering108.com

33. To draw the line perpendicular to a given line at a given point Using Compass r1r1 r2r2 + C r2r2 r 2 > r 1 A B D engineering108.com

34. Adjacent-sides method To draw the line perpendicular to a given line from a point not on the line + C engineering108.com

35. + C To draw the line perpendicular to a given line from a point not on the line Adjacent-sides method Repeat engineering108.com

36. Using compass r2r2 + C r2r2 r1r1 Note: You can also use revolve method. How ? Try by yourself !!! To draw the line perpendicular to a given line from a point not on the line B A D engineering108.com

37. + C To draw a line making 15 o with a given line and pass through a given point. Given engineering108.com

38. + C To draw a line making 15 o with a given line and pass through a given point. Given engineering108.com

39. To draw a line making 30 o with a given line and pass through a given point. + C Given engineering108.com

40. To draw a line making 75 o with a given line and pass through a given point. + C Given engineering108.com

41. FILLET AND ROUND Sharp corner Fillet Round engineering108.com

42. FILLET AND ROUND To draw the arc, we must find the location of the center of that arc. How do we find the center of the arc? engineering108.com

43. To draw an arc of given radius tangent to two perpendicular lines Given arc radius r r r engineering108.com

44. To draw an arc of given radius tangent to two perpendicular lines Given arc radius r center of the arc Starting point Ending point engineering108.com

45. To draw an arc of given radius tangent to two lines Given arc radius r + + r r engineering108.com

46. To draw an arc of given radius tangent to two lines Given arc radius r T.P.1 T.P.2 engineering108.com

47. C To draw a line tangent to a circle at a point on the circle Given engineering108.com

48. To draw a line tangent to a circle from a point outside the circle Given C mark a tangent point engineering108.com

49. When circle tangent to other circle C1 C2 Tangent point R1 R2 R1 + R2 The center of two circles and tangent point must lie on the same straight line !!! engineering108.com

50. To draw a circle tangent to two circles I + C2C2 Given + C1C1 C + Example engineering108.com

51. + + C1C1 C2C2 R + R 1 Given Two circles and the radius of the third circle = R R + R 2 R1R1 R2R2 C center of the arc To draw a circle tangent to two circles I R engineering108.com

52. C2 R2 When circle tangent to other circle C1 Tangent point R1 The center of two circles and tangent point must lie on the same straight line !!! R2  R1 engineering108.com

53. Given + C1C1 + C2C2 C + To draw a circle tangent to two circles II Example engineering108.com

54. + + C1C1 C2C2 R – R 2 To draw a circle tangent to two circles II Given Two circles and the radius of the third circle = R R – R 1 R1R1 R2R2 C R engineering108.com

55. + C1C1 + C2C2 To draw a circle tangent to two circles III Given Two circles and the radius of the third circle = R R + R 2 R – R 1 R1R1 R2R2 C engineering108.com

56. Keep Your Drawing Clean DoDon’t engineering108.com

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