• Autocad 2016 Tutorials Pdf

Topics covered in this Lesson: An introduction to drafting in 3 Dimensions INTRODUCTION - WHY 3-D? You may have already figured out why CAD has many advantages over manual drafting. One big advantage is that once you've drawn something, you shouldn't have to draw it again. If you manually drew a house plan, you would have to draw a front elevation, side elevations, and possibly a perspective view. With one 3-D CAD model, you can generate views from any angle either inside or outside the house and animations. Afterwards, if your client needs something changed, you can then make the changes once and re-render your views.

If you're drawing mechanical parts, you can generate virtual prototypes or even create rapid prototypes. In this manner Boeing was able to the 777 jetliner. This level of engineering would be impossible without CAD. Your company may not do a lot of 3D work, but it is still a good skill to have and it's also more fun than 2D.

AutoCAD programs cover a broad range of applications. Experiment with other drawing options. As you become proficient with AutoCAD, you'll be able to convert lines into 2D surfaces, surfaces into 3D solids, add realistic material.

You'll be learning the 3-D concepts in the following order: Isometric Drawings (not true 3D) Wire-frame (very basic 3D) Surfaces / Regions (primitive 3D) Solid Objects (advanced 3D) You will have a chance to draw the same object different ways to see the differences between the various methods. Before entering the exciting world of 3-D, you'll have to learn some more CAD terminology. This level presumes that you have a good understanding of 2D commands. 3-D CAD TERMINOLOGY 2-D A concept of displaying real-world objects on a flat surface showing only height and width. This system uses only the X and Y axes.

3-D A way of displaying real-world object in a more natural way by adding depth to the height and width. This system uses the X Y and Z axes. Commands that allow you to add, subtract or intersect solid objects in AutoCAD. Complex surface Generally a curved surface. Examples: car fender, landscape contour. Elevation The difference between an object being at zero on the Z-axis and the height that it is above zero. Extrude The extrude command raises the shape of a 2D outline into a 3D solid.

For example, a circle would be extruded into a cylinder. Face The simplest true 3-D surface. Facet A three or four sided polygon that represents a piece (or section) of a 3-D surface. Hidden line removal A way of hiding lines that would not be visible if you were viewing the actual object you have drawn in AutoCAD.

(Command: HIDE) A simple way of achieving a '3-D' appearance using 2-D drawing methods. Plan View Also known as the top view, a plan view looks directly down the WCS Z-axis to the X-Y axis. A basic solid building block. Examples would be boxes, cones, cylinders.

A 2-D area consisting of lines, arcs, etc. A complex way of adding photo-realistic qualities to a 3-D model you have created. Shading A quick way of adding color to a 3-D object you have drawn. (Command: SHADE) Solid Model A 3-D model creating using solid 'building blocks'. This is the most accurate way of representing real-world objects in CAD. Surface Model A 3-D model defined by surfaces.

The surface consists of polygons. (See facets.) A property of lines and other objects that gives them a 3-D like appearance. The user co-ordinate system. This is defined by the person drawing to have easier access to portions of a 3-D model. A particular view of the object you have created. A window into your drawing showing a particular view.

You can have several viewports on your screen. Different from the viewports used in plotting. A 3-D shape that is defined by lines and curves.

A skeletal representation. Hidden line removal is not possible with this model.

The third axis that defines the depth. As computers and software get more powerful, working in 3D becomes more popular. You have more power in desktop machine today, than was dreamed of when CAD first appeared.

Be prepared that you will likely need to learn 3D at some point in your career. Once you are comfortable working in 3D, you'll find that you will rarely want to draw in 2D again.

Autodesk (the makers of AutoCAD) make other products designed specifically for certain disciplines -, and more. Depending upon your budget and needs, you may need to look into programs like these. The concepts taught in these lessons will aid you when you work in any 3D program. Reference: Have a look at some before you start in this new world.

CAD Lab model viva questions. 1. Of Civil Engineering, OPTC Edavanna Page 1 COMPUTER AIDED DRAFTING LAB (Viva Questions) 1. What is meant by AutoCAD? AutoCAD is one of the CAD system software introduced by Autodesk. Mention some CAD packages?  AUTOCAD  STAAD  3DsMax  REVIT  BEAMD  STRAP  MATLAB  MS Project  ETABS  EPANET 3.

What is the difference between CAD & CADD? CAD - Computer Aided Design CADD - Computer Aided Design and Drafting 4. What are the applications of CAD?

 Preparing Architectural drawing  Interior design and modelling  Tool and fixture design.  Production planning and control.  Preparing of assembly list and bill of material.

 Computer aided inspection.  Preparation of programs for CNC machine.  Circuit layout and panel drawing.

Define current UCS? The User Co-ordinate System - Determines X,Y and Z axis. The file extension and format for the standard AutoCAD drawing. What is a hatch patterns? A pattern of lines, dots and other shapes that fills in a closed area. Command: H + Enter Orphanage Polytechnic College, Edavanna.

Dept. Of Civil Engineering, OPTC Edavanna Page 2 8.

What are the advantages of CAD?  High Accuracy  Speed  Easy Editing  Space effectiveness  Scaling  Better visualization  Freedom from using Drawing instruments 9.

Define block? A block is simply a collection of objects that has a name. Blocks have several advantages:  You can insert them again and again, saving time.  Can insert blocks into other drawings as well. 10.Shortcut keys for important commands Line L Arc A Circle C Polyline PL Move M Ellipse EL Copy CO Obj Snap F3 Hatch H Isoplane F5 Explode X Grid F7 Trim TR Ortho F8 Mirror MI Snap F9 Offset O Block B Dimension style D Boundary BO Text T Construction line XL Rotate RO Ray RAY Fillet F Extrude EXT Break BR Unit UN Zoom Z Join J.

Dept. Of Civil Engineering, OPTC Edavanna Page 3 11.What is mean by ARRAY?

What are types of ARRAYS? To create multiple copies of selected objects and to arrange them in a pattern is called an array. There are three types of arrays: a) Rectangular b) Path c) Polar 12.What are Boolean operations in AutoCAD 3D?

UNION - Joins two or more solids objects b. SUBSTRACT - Subtracts one or more solids from another c. INTERSECTION – Creates a solid based on the intersected geometry 13.What are intelligent selection commands?

Filter 14.What is a layer? Layers are the primary method for organizing the objects in a drawing by function or purpose. Layers can reduce the visual complexity of a drawing and improve display performance by hiding information that you don’t need to see at the moment. 15.What is mean by design centre?

Design Centre (DC) provides a way of quickly locating content such as drawing files, block definitions, and hatches. 16.What is mean by isometric drawing? All the vertical lines are drawn vertically but all horizontal lines are drawn at 30 degrees to the base line. It is also a method of 3D drawing in 2D plane. 17.What is mean by perspective drawing? What is difference b/w one point, two point and three point perspectives?

A view in which objects are smaller as their distance from the observer increases. One point perspective – one vanishing point (VP) 2.

Two point perspective – 2 VP 3. Three point perspective – 3 VP 18.What is mean by SWEEP? It creates a 3D solid object by sweeping a 2D figure along a path. Of Civil Engineering, OPTC Edavanna Page 4 19.What is mean by RENDER? It creates a realistically shaded image of a three dimensional wireframe or solid model. 20.Define the following terms.

Software: A collection of computer programs, libraries and related data Hardware: collection of physical parts of a computer system Input device: Eg:- Keyboard, mouse, scanner, etc Output device: Printer, Projector, Monitor, etc Analysis: Details like Shear force, bending moment, deflection, etc Design: Details like Reinforcement details CAD/CAM: Computer-Aided Design and Computer-Aided Manufacturing Project management: It is the discipline of initiating, planning, executing, controlling, and closing the work of a team to achieve specific goals and meet specific success criteria. Standard paper sizes 22. Model procedure 1. Open AutoCAD 2016 and setup the CAD worksheet. Set the units by typing UN + Enter 3. Using tools like LINE, PLINE, ARRAY, TRIM, OFFSET, etc complete the drawing 4.

Autocad 2016 Tutorials Pdf

Add dimensions and detailing. Detailing is done using MULTILINE TEXT.

Elevations are plotted by extending lines from plan; sections drawn using extending lines from elevation. Specifications are added in detail using MULTILINE TEXT.

Save the drawing as PDF or plot it. Think and modify procedures appropriately to the given question. All the best Paper Size A0 841 x 1189 A1 594 x 841 A2 420 x 594 A3 297 x 420 A4 210 x 297.