Introduction to Computer Aided SketchingIntroduction, Drawing Instruments and their uses, BISconventions, Lettering, Dimensioning and free hand practicing.Computer screen, layout of the software, standard toolbar/menus and description of most commonly used tool bars,navigational tools. Co-ordinate system and reference planes. ofHP, VP, RPP & LPP. of 2D/3D environment. Selection of drawingsize and scale. Commands and creation of Lines, Co-ordinatepoints, axes, poly-lines, square, rectangle, polygons, splines,circles, ellipse, text, move, copy, off-set, mirror, rotate, trim,extend, break, chamfer, fillet, curves, constraints viz. tangency,parallelism, inclination and perpendicularity. Dimensioning, lineconventions, material conventions and lettering.
Orthographic projectionsIntroduction, Definitions - Planes of projection, reference line andconventions employed, Projections of points in all the fourquadrants, Projections of straight lines (located in Firstquadrant/first angle only), True and apparent lengths, True andapparent inclinations to reference planes (No applicationproblems).Orthographic Projections of Plane Surfaces (First Angle ProjectionOnly)Introduction, Definitions–projections of plane surfaces–triangle,square, rectangle, rhombus, pentagon, hexagon and circle,planes in different positions by change of position method only(No problems on punched plates and composite plates).
Projections of Solids (First angle Projection only)Introduction, Definitions – Projections of right regulartetrahedron, hexahedron (cube), prisms, pyramids, cylinders andcones in different positions (No problems on octahedrons andcombination solid).
Sections And Development of Lateral Surfaces of SolidsIntroduction, Section planes, Sections, Section views, Sectionalviews, Apparent shapes and True shapes of Sections of rightregular prisms, pyramids, cylinders and cones resting with baseon HP. (No problems on sections of solids)Development of lateral surfaces of above solids, their frustumsand truncations. (No problems on lateral surfaces of trays,tetrahedrons, spheres and transition pieces).
Isometric Projection (Using Isometric Scale Only)Introduction, Isometric scale, Isometric projection of simple planefigures, Isometric projection of tetrahedron, hexahedron(cube),right regular prisms, pyramids, cylinders, cones, spheres, cutspheres and combination of solids (Maximum of three solids).