Engineering Drawing Ppt Slides

Slide 7: Problem: Draw an ellipse by general method, given distance of focus from directrix 50 mm and eccentricity 2/3. Also draw normal and tangent on the curve at a point 50 mm from the focus.

Draw a vertical line AB of any length as directrix and mark a point C on it. Draw a horizontal line CD of any length from point C as axis D 3.

Mark a point F on line CD at 50 mm from C F 4. Divide CF in 5 equal divisions V 5. Mark V on 2nd division from F 6. Draw a perpendicular on V and mark a point E on it at a distance equal to VF E 7.

Join CE end extend it 8. Mark points 1,2,3on CF beyond V at uniform distance, and draw perpendiculars on each of them so as to intersect extended CE at 1’,2’,3’. 1 23 4 5 6 7 8 9 10 11 1’ 2’ 3’ 4’ 5’ 6’ 7’ 8’ 9’ 10’ 11’ 90º TANGENT NORMAL 90º DESIGNED BY: AKASH SOODM.I.T.M. Slide 8: Problem: Draw a parabola by general method, given distance of focus from directrix 50 mm. Also draw normal and tangent on the curve at a point 50 mm from the focus.

Draw a vertical line AB of any length as directrix and mark a point C on it. Draw a horizontal line CD of any length from point C as axis D 3.

Mark a point F on line CD at 50 mm from C V 5. Mark V on mid point of CF 6. Draw a perpendicular on V and mark a point E on it at a distance equal to VF E 7. Join CE end extend it 8.

Mark points 1,2,3on CF beyond V at uniform distance, and draw perpendiculars on each of them so as to intersect extended CE at 1’,2’,3’. 1 2 3 4 5 6 7 8 9 F 1’ 2’ 3’ 4’ 5’ 6’ 7’ 8’ 9’ 90º 90º TANGENT NORMAL DESIGNED BY: AKASH SOODM.I.T.M. Slide 16: P O 3’ 4’ 5’ 2 1 3 4 5 2’ 1’ HYPERBOLATHROUGH A POINT OF KNOWN CO-ORDINATES Solution Steps:1) Extend horizontal line from P to right side. 2) Extend vertical line from P upward.3) On horizontal line from P, mark some points taking any distance and name them after P-1, 2,3,4 etc.4) Join 1-2-3-4 points to pole O.

Let them cut part P-B also at 1,2,3,4 points.5) From horizontal 1,2,3,4 draw vertical lines downwards and6) From vertical 1,2,3,4 points from P-B draw horizontal lines.7) Line from 1 horizontal and line from 1 vertical will meet at P1.Similarly mark P2, P3, P4 points.8) Repeat the procedure by marking four points on upward vertical line from P and joining all those to pole O. Name this points P6, P7, P8 etc. And join them by smooth curve. Problem No.10: Point P is 40 mm and 30 mm from horizontal and vertical axes respectively.Draw Hyperbola through it. DESIGNED BY: AKASH SOODM.I.T.M.

Slide 17: Problem 14: Two points A and B are 50 mm apart. A point P moves in a plane in such a way that the difference of its distance from A and B is always constant and equal to 20 mm. Draw the locus of point P. Draw a line and mark two points A & B on it at a distance of 50 mm.

Engineering Drawing Ppt Slides Free

A B o Mark O as mid point of AB. Mark two points V1 and V2 at 10 mm on either side of O.

V1 V2 Mark points 1, 2,3 on the right of Bat any distances. 1 2 3 As per the definition Hyperbola is locus of point P moving in a plane such that the difference of it’s distances from two fixed points (F1 & F2) remains constant and equals to the lengthof transverse axis V1 V2. Take V11 as radius and A as centre and draw an arc on the right side of A. Take V21 as radius and B as centre and draw an arc on the left side of B so as to intersect the previous arc. Repeat the same steps on the other side to draw the second hyperbola. Repeat the step with V12, V22 as radii and V13, V23 as radii respectively.

Arc of circle Method DESIGNED BY: AKASH SOODM.I.T.M.