ENGT 122 – CAD I

1. ENGT 122 – CAD I CAD I – Outline & Chapter 1 – Intro to AutoCAD & Chapter 2 – Getting Started with Auto-CAD

2. CAD I - Outline • Chap 1 – Introduction to AutoCAD • Chap 2 – Getting Started • Chap 3 – Drawing Commands • Chap 4 – Drawing Aids • Chap 5 – Editing Commands • Chap 6 – Editing with Grips • Chap 7 – Creating Text • Chap 14 – Hatching • Chap 18 – Blocks

3. Outline Chapter 1 –Intro to AutoCADChapter 2 - Getting Started • CAD Intro • Starting and Stopping AutoCAD • File Commands (Saving, Opening, Closing) • Command input Methods • Coordinates - Systems & Input Methods • Drawing Simple Objects (Lines, Circles) • Selection Methods & Modifying Objects (Erase, Undo, Move) • Display Commands (Zoom, Pan) • Basic Plotting • Help System

4. What do you think CAD is?

5. What is CAD? • CAD stands for Computer-Aided Design/Drafting. • It involves inputting lines, arcs, dimensions, and text into an electronic database for engineering purposes and in compliance with specific industry standards. • The ability to manipulate graphical data in many ways during and after completion of any job. • There are many types of CAD systems and brand names, but you can break it down into 2D and 3D. In this Program we use AutoCAD 2012 for 2D and Inventor2012 for 3D.

6. What do you think are the advantages of CAD over Mechanical Drafting?

7. CAD Advantages • CAD software is more accurate. • Lines are crisp and clean. • Text is legible (usually). • Erasures are undetectable. • More productive. • Repetitive operations can be performed with a single command. • Symmetrical parts are easily replicated. • Editing drawings is much easier. • Drawing can be transferred electronically. • Storage requirements are minimal. • Drawing retrieval process is much easier. • Data is reusable. • What else?

8. What is AutoCAD? • AutoCAD is an interactive general purpose CAD (Computer Aided Drafting) program. • Developed in California in the early 1980’s by Autodesk Inc. • Used in many disciplines: mechanical, civil, architectural, electrical, etc. • Performs 2D drafting, 3D surfaces, and 3D solid modeling. • Functionality is extremely comprehensive to suit various needs. Difficulty ranges from very easy to very complex, depending on user requirements. • The world’s most popular PC-based design software. By knowing AutoCAD, you are more likely to get hired!

9. AutoCAD Icon Starting AutoCAD 3 ways to start AutoCAD: • Double-Click AutoCAD 2012 English icon on your desktop. • Use the Start Menu – Start > All Programs > Autodesk > AutoCAD 2012-English > AutoCAD 2012-English • Double-Click an AutoCAD .dwg file in Windows Explorer.

10. Start AutoCAD Uncheck the Show this window at start up check box and close the AutoCAD Exchange window. Demo/Exercise – Initial Setup Close Uncheck

11. Switch the Status Bar from icons to text (right click on any status bar button and uncheckUse Icons) Toggle off all Status Bar buttons (should turn gray, not blue) Demo/Exercise – Initial Setup Status Bar

12. Type the command STARTUP at the command prompt and then press the Enter key. Enter a value of 2 and then press the Enter key. Demo/Exercise – Initial Setup

13. Shutting Down AutoCAD • If you intend to keep the drawing data be sure you SAVEbefore exiting! • Exiting AutoCAD: • From Application Menu • Or click  in upper right corner. • Or type EXIT at command prompt followed by [Enter]. To Exit AutoCAD To Exit AutoCAD

14. Demo/Exercise – Initial Setup • Shut down AutoCAD without saving. Then restart AutoCAD. • You should get the following screen, notify your instructor if yours looks different.

15. Demo/Exercise – Initial Setup • Select the New file button, then select acad.dwt from the Select Template dialog box. Finally select Open. New

16. On the View Tab select User Interface and uncheck the ViewCubeand Navigation Bar check boxes. Demo/Exercise – Initial Setup Status Bar View Tab Uncheck these • On the status bar toggle off the GRID button so it turns gray. Turn off Grid

17. Select the Save button. Under Files of Type choose AutoCAD Drawing Template (*.dwt) Select the file named acad.dwt Select Save, then Close the acad.dwtfile. Demo/Exercise – Initial Setup Save

18. Demo/Exercise – Initial Setup • Select the New file button, then select acadiso.dwt from the Select Template dialog box. Finally select Open. New

19. On the View Tab select User Interface and uncheck the ViewCubeand Navigation Bar check boxes. Demo/Exercise – Initial Setup Status Bar View Tab Uncheck these • Verify the GRID button on the status bar is toggled off (gray). Turn off Grid

20. Select the Save button. Under Files of Type choose AutoCAD Drawing Template (*.dwt) Select the file named acadiso.dwt Select Save, then close the file acadiso.dwt. Demo/Exercise – Initial Setup Save

21. Starting a New File • You can start a new file using the Application Menu>New or the New button on the Quick Access Toolbar. English units (feet, inch) Metric units (mm) • To work in English units (feet or inches) choose acad.dwt from Select Template dialog box. • To work in Metric units (millimeters) choose acadiso.dwt from Select Template dialog box.

22. Startup - Using a Template • AutoCAD drawings are identified by a .dwgextension. When you save a drawing a .dwgextension is applied. • However, when you start a new drawing, AutoCAD loads a template file with a .dwtextension. • So What is a Template? Standardized file formats with preset internal variables. Provided by AutoCAD or created by user. • Limits (drawing length & width) • Text Height • Dimension Scale • LinetypeScale

23. Startup - Using a Template • You can start a drawing using a standard AutoCAD template or a user defined template that you create. Your Drawing settings will match the defined template properties. • AutoCAD Templates: • Standardized formats provided with AutoCAD. • Typically found in AutoCAD subfolder called Templates. • User defined templates: • Template file containing commonly used settings & objects. • Use Browser to locate user template.

24. Startup – Using a Template • Important: You must start with the correct template that corresponds with the units you intend to use. • For Metric Units • units = millimeters • Template file = acadiso.dwt • For Imperial/English Units • units = feet and inches • Template file = acad.dwt

25. Exercise: • Start AutoCAD • Start a drawing using English units (inch/feet). • Exit AutoCAD. DO NOT save your drawing! • Restart AutoCAD • Start a drawing using Metric units (mm). • Exit AutoCAD. DO NOT save your drawing! • Restart AutoCAD • Start a drawing using the following AutoCAD template: Tutorial-iarch.dwt • Exit AutoCAD. DO NOT save your drawing!

26. Saving Your Work! • As you work on an AutoCAD drawing, all data for the drawing resides in RAM memory on the computer. • If you close the AutoCAD session or some other misfortunate event occurs, ALL DATA WILL BE LOST! AND CANNOT BE RECOVERED! It’s enough to make a grown man or woman cry!…that is unless you have SAVED your session!

27. Saving Your Work! Top 8 Events that will make you cry! Accidentally exiting AutoCAD. AutoCAD bugs. Failure of Microsoft Windows OS. Power failure (frequent occurrence). Unrecoverable error in drawing. Network issues or shutdown. Disrupting a network or power cable. Missing an assignment due to above!

28. Saving Your Work! • *Important – You should save to a folder on your NETWORK drive (U:) whenever possible! Network drives are backed up daily and can be recovered in the event of system failure. • If you save to the local hard drive (C:) and the disk fails you are S.O.L.! • If you save to your flash drive and loose it, forget it, or destroy it in the wash machine you are S.O.L.! • Hint:No excuses for late assignments unless its due to a network problem!

29. Saving Your Work! • Most common ways to Save are the Application menu commands: Save & Save As… • First time file is saved, a file name must be supplied. Either command brings up “Save As” dialog box for file name entry. • Subsequent saves: • Save – saves to the existing drawing file name. No prompts or dialog box occurs. • Save As - brings up same dialog box. If new name is provided, data is saved to that new file and current drawing session name is updated.

30. *NOTE: All AutoCAD files have a .dwg extension. This is how you identify them. Saving Your Work! Click to browse for a folder • Save As Dialog Box: Selects folder where file is saved Moves folder up one level. Pre-existing file name may be selected from this list. File will be overwritten. Enter file name to save to. Drawing name will update as well. Not necessary to include .dwg extension. Added automatically. Click Save after folder and file name are entered

31. Saving Your Work! • Toolbar Quick Save: saves to the existing drawing file name. No prompts or dialog box occurs. Acts identical to Save from application menu.

32. Saving Your Work! Smart Save Tips: • Save often! – it’s a good idea to save after every major change to a drawing. • Create sensible file names that indicate the content. • Create a running history of your save files for each particular assignment or project; • Ex: Assign1_Bracket A.dwg 1st major save Assign1_Bracket B.dwg 2nd major save Etc. • Create a logical folder structure to save to (from orientation): • Create folders for each course (Draft I, CAD I, etc) • Create subfolders for assignments. • Create separate subfolder for class exercises.

33. Save – Application Menu: Open a new drawing and examine default file name. Show Save & Save As in Application menu. Show First save & subsequent saves. Demo

34. Opening and Closing Files • You can open and close multiple files at any time without leaving AutoCAD. • Typically use Application menu to perform such operation. • Starts a new file. Initiates Select Template dialog box. • Opens an existing file. Initiates Select-File dialog box. Allows you to browse for desired file. • Closes the active session. If the session has not been saved, a prompt to save will be initiated.

35. Opening and Closing Files: Open an existing file. Open a new file. Close a file. Demo

36. End Lecture 1

37. Application Menu Ribbon Screen Layout Quick Access Toolbar Toolbar Menus Ribbon Menu Graphics Window World CS Origin Command Window Status Bar Buttons

38. Making AutoCAD DoStuff • AutoCAD uses Commands, Command Input Data,and System Variables in order to perform a particular function. • Commands – user selected instructions telling AutoCAD which operation to perform. • Example:Line – creates a line • Example: Circle – creates a circle • Command Input Data–additionalinput data supplied by the user when issuing a command. • Example:End points for creating a line with the Line command • System Variables – Internal AutoCAD data settings that control how a particular AutoCAD command is performed.

39. Command Input • Redundant Commands – • A specific command can typically be issued by various methods. • Don’t let this confuse you, it simply allows options for you to work in a manner you prefer. • Methods for issuing a command: • Keyboard / Command Line • Ribbon Menus • Toolbar Button Menus • Be Observant -for all methods the Command Window will prompt for command input data, indicate command status, and list the command history.

40. Keyboard / Command Line: • Type a command at command line prompt Command:followed by [Enter] • Command prompt (Command:)must first be displayed, otherwise a previous command is still active. • Use [Esc] to cancel previous command. Command history Command line prompt or data input prompt

41. Ribbon Menu: • Uses Tabbed categories. • Within each tab are categorized Panels • Select command with left mouse button. • Drop down arrows indicate additional options/commands. Arrows indicate additional options or commands Panel names within Tabs Command history data input prompt

42. Issue command by keyboard. Show response in Command Window. Show contents of ribbon menus and drop down arrows. Issue command by ribbon menu. Demo

43. Toolbar Menus: • Hold mouse pointer over toolbar command to display tool-tip (name of command). • Select command icon with left mouse button. • Only displayed toolbars are accessible and not all command options are available. Tool-Tip for Line command Command history data input prompt

44. Toolbar Menus: • Toolbar commands are grouped in logical categories; • Draw Toolbar,Modify Toolbar,etc. • Toolbar menus are configurable; • Can be displayed or hidden. • Can be reshaped. • Can be arranged anywhere on the screen. • Toolbar visibility is controlled by; • Right mouse click on any toolbar. • -TOOLBAR command. Right click on any toolbar

45. Show –TOOLBAR command to show DRAW toolbar. Issue command by toolbar. Show other options of –TOOLBAR command. Right click to show additional toolbars. Show how to close toolbars. Configure toolbar; Change visibility Change location Change Shape Demo

46. Exercise: • Use the –TOOLBAR command to show the Draw toolbar. • Use right mouse click to display the Dimension toolbar. • Move Dimension toolbar to the middle of the screen. • Reshape Dimension toolbar until approximately square. • Close the Dimension toolbar. • Use right mouse click to display the Object Snap toolbar. • Embed Object Snap as a vertical column into the menu on the right side of the graphics screen. • Display the View and Inquiry toolbars and embed them in the menu on the left side of the screen.

47. Exercise: • Use –TOOLBAR command to first hide all toolbars. • Then use –TOOLBAR command to show only the Draw and Modify toolbars and place as shown. • This layout will be used for class demonstrations. You should also maintain this toolbar arrangement for the initial portion of the course. We will add additional toolbars as the class progresses. Draw & Modify Toolbars

48. Coordinate Space • In AutoCAD, geometry such as lines and circles are created by locating points on the screen. • A Coordinate System is used as a reference for locating such points. In AutoCAD the primary CS is the World Coordinate System. • Points can be placed in the WCS using several Coordinate System Input Methods: • 2D Rectangular Coordinates • 2D Polar Coordinates • 3D Cartesian Coordinates • 3D Cylindrical Coordinates • 3D Spherical Coordinates

49. +Y X Y +X -X -Y Coordinate Space 2D Rectangular Coordinates (Cartesian): • Plane defined byhorizontalX andverticalY axes. • Origin(0,0)is intersection ofXand Yaxes. • Xcoordinate measureshorizontaldistance from origin. • Ycoordinate measuresverticaldistance from origin. • Coordinates of a point are indicated by X, Y pairs. Ex: -3,5

50. Exercise: • What are the X & Y coordinates of point: • A • B • C • D • E • Locate point at: • -5, -4 • 6, 1.8 • 2.4, -1 • -5, 4 • -3,-5 Y B E A X D C