TA 101 T hink and A nalyze Anupam Saxena Associate Professor Mechanical Engineering Compliant and Robotic Systems Lab Indian Institute of Technology Kanpur
Axonometric Views Isometric views
Organization of Lectures and Laboratory Assignments TopicWeek (No. of Lectures)Lab Intro and Basic ConstructionsWeek 1 (2) Orthographic ProjectionsWeek 2 (2)Lab 1 Orthographic ProjectionsWeek 3 (2)Lab 2 Isometric ProjectionsWeek 4 (2)Lab 3 Missing ViewsWeek 5 (2)Lab 4 Sectional and AssemblyWeek 6 (2)Lab 5 Oblique ProjectionsWeek 7 (2)Lab 6 Perspective ProjectionsWeek 8 (2)Lab 7 Lines and PlanesWeek 9 (2)Lab 8 Lines and PlanesWeek 10 (2)Lab 9 Auxiliary ProjectionsWeek 11 (2)Lab 10 Intersection of lines/planes/solids Week 12 (2)Lab 11 Intersection and DevelopmentWeek 13 (2)Lab 12 TOTAL2612
ANUPAM SAXENA TA101 LECTURE VIII ISOMETRIC PROJECTION Unit cube x z O (1, 0, 0) P R (0, 0, 1) Q(0, 1, 0) Rotation about ‘z’, then about ‘x’ and then projection on the y-z plane |OR| = |OQ| and |OR| = |OP| gives
Unit cube x z O (1, 0, 0) P R (0, 0, 1) Q(0, 1, 0) Rotation about ‘z’, then about ‘x’ and then projection on the y-z plane X Y Z O 30 deg foreshortening happens by ANUPAM SAXENA TA101 LECTURE VIII ISOMETRIC PROJECTION
Unit cube x z O (1, 0, 0) P R (0, 0, 1) Q(0, 1, 0) Rotation about ‘z’, then about ‘x’ and then projection on the y-z plane X Y Z O 30 deg foreshortening happens by ANUPAM SAXENA TA101 LECTURE VIII ISOMETRIC PROJECTION
ANUPAM SAXENA TA101 LECTURE VII ISOMETRIC VIEW
ANUPAM SAXENA TA101 LECTURE VII ISOMETRIC VIEW: SCALE 1: Not Unique: Choose the orientation NO HIDDEN LINES: ALL LINES ARE SOLID BE CAREFUL WITH VISIBLE/INVISIBLE LINES ISOMETRIC VIEWS ARE “REALISTIC” WE SHOW WHAT WE SEE !
TA: What happens to the shape of a circle on the x-y plane ? x y X = a + rcos Y = b + rsin Z = 0 Ellipse on the ‘isometric Xn-Zn’ plane ANUPAM SAXENA TA101 LECTURE VIII ISOMETRIC PROJECTION x z O P R Q
TA: What happens to the shape of a circle on the y-z plane ? y z X = 0 Y = a + rcos Z = b + rsin Ellipse on the ‘isometric Xn-Zn’ plane ANUPAM SAXENA TA101 LECTURE VIII ISOMETRIC PROJECTION x z O P R Q
TA: What happens to the shape of a circle on the x-z plane ? x z X = a + rcos Y = 0 Z = b + rsin Ellipse on the ‘isometric Xn-Zn’ plane ANUPAM SAXENA TA101 LECTURE VIII ISOMETRIC PROJECTION x z O P R Q
3030 30 ANUPAM SAXENA TA101 LECTURE VIII ISOMETRIC PROJECTION: EXAMPLE WITH ELLIPSES
ANUPAM SAXENA TA101 LECTURE VIII ISOMETRIC PROJECTION: SCALE 1: 30 X Y Z Z Y X
ANUPAM SAXENA TA101 LECTURE VIII ISOMETRIC PROJECTION: SCALE 1: 30 TA: TRICK ! SAVES A LOT OF TIME X Y Z Z Y X
keep T hinking and A nalyzing Until next time...