Continuing Education Department AutoCAD Instructor: Dr.Ashok Kaushal E-mail: ashok_kaushal@hotmail.com Topics Intro to CAD, Geometric commands, Absolute & Relative values, Line, Circle, Arc Dr. Ashok Kaushal 1
Portfolio AutoCAD 1. Use Concordia University 3 ring binder. 2. 2. A title page is required. Concordia University Computer Institute Course CI811 : AutoCAD Instructor s name & Student name Date submitted 3. A table of contents listing all drawings is required. 4. Include your term projects. 5. Marks are given for professional presentations. Dr. Ashok Kaushal 2
1. Introduction to CAD AutoCAD History of AutoCAD hardware & software first version was in 1982 running on Zilog Z-80 based CP/M microcomputer rewritten for DOS on Intel CPUs originally was 2D design software Windows based version available with Version 12 basic 3D functions have now been built in the main program present software in lab is Version 2006 Dr. Ashok Kaushal 3
Minimum Equipment Requirements Pentium III based CPU, 256 Mb RAM, 17 monitor Advantages still the world s leading design software users far outnumber any other CAD software (3.5 million) mid-range cost Limitations 3D design capabilities are just now catching up to competition parametric capabilities require add-in package competition offers more integrated solutions for entire design,analysis and manufacturing cycle Dr. Ashok Kaushal 4
Other AutoDesk products Architectural Desktop Inventor Mechanical Desktop Main CAD Programs AutoCAD & AutoDesk Mechanical Desktop Bentley Microstation CADKEY CATIA & Solid Edge IntelliCAD Pro-Engineer SolidWorks Dr. Ashok Kaushal 5
Standard AutoCAD Startup AutoCAD 1. Press on Start button (lower left corner) 2. Press on Programs 3. Press on AutoDesk 4. Press on AutoCAD 2006>AutoCAD 2006 5. AutoCAD Drawing editor is on screen Drop down menu on top: File Edit View etc Windows Icons on top & side Command line on bottom: Command Some functions on bottom: snap grid ortho etc duplicate keyboard function keys: F6 F7 F8 F9 Dr. Ashok Kaushal 6
Dots on screen show grid use mouse to go to bottom farthest left dot coordinate should be 0,0 (press F6 if you can not see coordinates in bottom left corner of screen) use mouse to go to top farthest right dot coordinate should be 12,9 Press F7 to turn off grid or double click on grid function on bottom of screen Press F7 to turn on grid and press F9 to turn on snap Grid/snap allows quicker perfect placement of lines according to specific points move mouse across the grids the mouse snaps to the various dots on the grid press F9 to turn off snap function Dr. Ashok Kaushal 7
Geometric Commands AutoCAD 1. Line Command Described by two points Options C will close a series of lines with a line from the last point to the first point U will undo the last entered point Press F8 for orthogonal vertical & horizontal Dr. Ashok Kaushal 8
Coordinate Systems X-Y coordinate system y x (x2,y2) (x1,y1) Dr. Ashok Kaushal 9
Absolute Values Dr. Ashok Kaushal 10
Absolute Values - Results Dr. Ashok Kaushal 11
Relative Values Dr. Ashok Kaushal 12
Relative Values - Results Dr. Ashok Kaushal 13
Polar Coordinate System Dr. Ashok Kaushal 14
Line - u & c Dr. Ashok Kaushal 15
Example 1.0 Dr. Ashok Kaushal 16
Geometric Commands 2.Circle Command Described by two points ; a center and a radius Circle Options 3P - a circle fit through 3 points 2P - a circle fit through 2 points TTR - a circle that is tangent on its diameter to two selected objects indicated with a specified radius Dr. Ashok Kaushal 17
Circle - center point, 3P & 2P Dr. Ashok Kaushal 18
Circle-center point, 3P & 2P-results Dr. Ashok Kaushal 19
Circle -TTR Dr. Ashok Kaushal 20
Circle -TTR - Results Dr. Ashok Kaushal 21
ARC Dr. Ashok Kaushal 22
ARC - Results Dr. Ashok Kaushal 23
Point Entry 1. Picking Pick a point on the screen. 2.Coordinate Entry Enter absolute, relative or polar coordinates. 3.Osnap, Object snap or entity selection Access specific precise points on existing objects on screen endpoints, midpoints,intersection points, etc. Use shift with right mouse button to obtain options, use osnap toolbar, or osnap command line command which opens osnap dialog box Dr. Ashok Kaushal 24
Osnap options APPINT - (apparent intersection) -snaps to real or imaginary intersection of two objects CENter - snaps to the center of an arc or a circle ENDpoint - snaps to the closest end of any object INSertion - snaps to to the insertion point of a block INTersection - snaps to the intersection of two objects MIDpoint - snaps to the midpoint of a selected item NEARest - snaps to a point on an object nearest to the digitized point NODE - snaps to a point created by POINT, DIVIDE, or MEASURE Dr. Ashok Kaushal 25
NONE - turns the object snap off PERpendicular - snaps to a 90 degree angle to a existing line QUADrant - snaps to the 0,90,180,270 degree point on an arc,circle, or ellipse Quick - snaps to the first snap point found TANgent - snaps to the tangent of a arc or circle Dr. Ashok Kaushal 26