# TA 101 T hink and A nalyze Anupam Saxena Associate Professor Mechanical Engineering Compliant and Robotic Systems Lab Indian Institute of Technology Kanpur.

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TA 101 T hink and A nalyze Anupam Saxena Associate Professor Mechanical Engineering Compliant and Robotic Systems Lab Indian Institute of Technology Kanpur

ANUPAM SAXENA TA101 LECTURE VI THIRD ANGLE PROJECTION

ANUPAM SAXENA TA101 LECTURE VI THIRD ANGLE PROJECTION THIRD QUADRANT

ANUPAM SAXENA TA101 LECTURE VI FIRST ANGLE PROJECTION

ANUPAM SAXENA TA101 LECTURE VI FIRST ANGLE PROJECTION FIRST QUADRANT

In case of DOUBTs or QUESTIONs

First angle projection is like keeping a solid in front of a screen and seeing it from the other side of the screen. It is just projecting all the edges, points features etc.. over a plane that is behind the solid. answers.yahoo.com In first-angle projection, the projectors originate as if radiated from a viewer's eyeballs and shoot through the 3D object to project a 2D image onto the plane behind it. In third-angle projection, the projectors originate as if radiated from the 3D object itself and shoot away from the 3D object to project a 2D image onto the plane in front of it. http://en.wikipedia.org/wiki/Engineering_drawing

In first-angle projection, the object is conceptually located in quadrant I, i.e. it floats above and before the viewing planes, the planes are opaque, and each view is pushed through the object onto the plane furthest from it. http://en.wikipedia.org/wiki/Multiview_orthographic_projection Important assumption: View the object from the right!

In third-angle projection, the object is conceptually located in quadrant III, i.e. it is positioned below and behind the viewing planes, the planes are transparent, and each view is pulled onto the plane closest to it. http://en.wikipedia.org/wiki/Multiview_orthographic_projection Important assumption: View the object from the right!

A n for the drawing Comes with practice… and with MISTAKES!

A n for the drawing Comes with practice… and with MISTAKES!

A n for the drawing Comes with practice… and with MISTAKES!

30 20 70 60  30 4 FACES AT R30 30 o SOLID II Front View 20 10

60 40 10 40 3030 30 ANUPAM SAXENA TA101 LECTURE VIII ISOMETRIC PROJECTION: EXAMPLE WITH ELLIPSES

ANUPAM SAXENA TA101 LECTURE VIII ISOMETRIC PROJECTION: SCALE 1:1 60 40 10 40 3030 30 10 USE ISOMETRIC SCALE USE TRUE SCALE ISOMETRIC PROJECTION/VIEW ISOMETRIC DRAWING

Missing lines and 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 IX MISSING LINES AND VIEWS ? ? ? ? ?

ANUPAM SAXENA TA101 LECTURE IX MISSING LINES AND VIEWS

ANUPAM SAXENA TA101 LECTURE IX MISSING LINES AND VIEWS

ANUPAM SAXENA TA101 LECTURE IX MISSING LINES AND VIEWS ? ?

ANUPAM SAXENA TA101 LECTURE IX MISSING LINES AND VIEWS

ANUPAM SAXENA TA101 LECTURE IX MISSING LINES AND VIEWS Minimum possible lines to be introduced TA: It helps to draw the isometric view to get an idea of the object’s shape

ANUPAM SAXENA TA101 LECTURE IX MISSING LINES AND VIEWS

ANUPAM SAXENA TA101 LECTURE IX MISSING LINES AND VIEWS TA: Even center lines are important

ANUPAM SAXENA TA101 LECTURE IX MISSING LINES AND VIEWS

T hink and A nalyze Until next time...

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