1. Welcome!
CAD 1 - CLASSWORK
You will have today and tomorrow to finish SGO 1 and SGO 2.
Do the best that you can with what you know.
These assignments are UNGRADED.
Please make sure to save them each as separate drawing files.

2. Introduction to CAD CAD I Mr. Shea Room 303
Welcome. Please check and make sure you are in the right room. For now you may sit wherever you want at the tables

3. Important Terms to Know
CAD: Computer Assisted Drafting
Command: An instruction issued to the computer to complete a specific task
Workspace: a preset work environment containing specific interface items
Interface: items that allow you to input data to and receive outputs from a computer system
Toolbars: interface items that contain two buttons or drop- down list.

4. Important Terms to Know
Command Line: area where you can type commands and options
Dialog Box: a window-like item that contains various settings and information
Escape Key: keyboard key used to cancel a command or exit a dialog box
Enter Key: keyboard key used to accept commands or preformed the default action of certain commands.

5. Important Keyboard Commands
Ctrl+X: CUT
Copies selected objects to the Clipboard and removes them from the drawing.
Ctrl+C: COPY
Copies objects a specified distance in a specified direction.
Ctrl+V: PASTE
Pastes objects from the Clipboard into the current drawing.

6. Important Keyboard Commands
Ctrl+Z: UNDO
Reverses the effect of commands.
NOTE UNDO has no effect on some commands and system variables, including those that open, close, or save a window or a drawing, display information, change the graphics display, regenerate the drawing, or export the drawing in a different format.
Ctrl+Y: REDO
Reverses the effects of previous UNDO or U command.
REDO must immediately follow the U or UNDO command.

7. Important Terms to Know
Zoom: make objects appear bigger by zooming in or smaller but zooming out on the screen without affecting their actual size.
To see your entire drawing  Zoom Extents
Z  (ENTER)  E (ENTER)
Pan: change the drawing display to select different portions of the drawing are visible on screen.

8. DRAW and MODIFY Toolbars

9. Drawing 1
Drawings represented in presentations are for reference only. Because they are pictures of the drawings you will use as reference, lines may appear cooked or skewed. Always refer to the class handouts when recreating drawings.

10. The DRAW Toolbar LINE Creates straight line segments.
Can create a series of attached line segments.
Each segment is a line object that can be edited separately

11. Drawing Aids
Drawing Aids Toolbar
ORTHO
POLAR
OSNAP

12. Drawing Aids
Polar Tracking: a drawing aid that causes the drawer in crosshairs to snap to predefined angle increments.
Ortho: (from orthogonal) which means at right angles.

13. The MODIFY Toolbar OFFSET
Creates concentric circles, parallel lines, and parallel curves.
You can offset an object at a specified distance or through a point.
After you offset objects, you can trim and extend them as an efficient method to create drawings containing many parallel lines and curves.

14. Drawing Aids
Object Snap: a tool that snaps to exact points such as an endpoint, midpoint, or points on or in relation to the existing objects.
Snapping: picking a point near the intended position to have the crosshairs snap exactly that specific point.
Drawing Aids Toolbar

15. The MODIFY Toolbar TRIM
Cuts objects to meet the edges of other objects.
To trim objects, select the boundaries. Then press Enter and select the objects that you want to trim. To use all objects as boundaries, press Enter at the first Select Objects prompt.

16. Important Keyboard Commands
Ctrl+C: COPY
Copies objects a specified distance in a specified direction.
Using the Copy button allows the user to specify a basepoint in copying the object.

17. Important Keyboard Commands
Selection Tool
To select objects, you can simply click on them. To add more, keep clicking.
To deselect objects, hold down SHIFT and select them again.
To select objects in an area, click once and drag a window around them.
Pulling a window top left to bottom right (BLUE) selects only objects that are entirely within the window.
Pulling a window bottom right to top left (GREEN) selects all objects at are within or partially touching the window

18. Drawing 2
Drawings represented in presentations are for reference only. Because they are pictures of the drawings you will use as reference, lines may appear cooked or skewed. Always refer to the class handouts when recreating drawings.

19. The MODIFY Toolbar ROTATE Revolves objects around a base point.
You can rotate selected objects around a base point to an absolute angle.

20. The MODIFY Toolbar ERASE the command to remove objects from a drawing
Users can also select objects and use the DELETE or BACKSPACE keys
You can erase selected objects from the drawing.
This method does not move objects to the Clipboard, where they can then be pasted to another location.
Selection Set: a group of one or more selected objects typically created to perform an editing operation on the selected objects

21. The MODIFY Toolbar MOVE
Transports objects a specified distance in a specified direction.
Use coordinates, grid snaps, object snaps, and other tools to move objects with precision

22. The MODIFY Toolbar EXTEND
Extends objects to meet the edges of other objects.
To extend objects, first select the boundaries.
Then press Enter and select the objects that you want to extend. To use all objects as boundaries, press Enter at the first Select Objects prompt.

23. The MODIFY Toolbar MULTILINE TEXT (MTEXT)
Creates a multiline text object.
You can create several paragraphs of text as a single multiline text object. With the built-in editor, you can format the text appearance, columns, and boundaries.
Going forward, it is UNACCEPTABLE to hand write you name on our papers when handing in. Points will be deducted.

24. Going forward, it is UNACCEPTABLE to hand write you name a drawing and handing it in. Points will be deducted.

25. Drawing 3
Drawings represented in presentations are for reference only. Because they are pictures of the drawings you will use as reference, lines may appear cooked or skewed. Always refer to the class handouts when recreating drawings.

26. The MODIFY Toolbar MIRROR
Creates an exact copy of selected objects around a specified axis
You can create objects that represent half of a drawing, select them, and mirror them across a specified line to create the other half.

27. The MODIFY Toolbar FILLET Rounds and fillets the edges of objects.
To create a sharp corner instead, enter a radius of zero

28. The MODIFY Toolbar CHAMFER Bevels the edges of objects.
The distances and angles that you specify are applied in the order that you select the objects.

29. Drawing 4
Drawings represented in presentations are for reference only. Because they are pictures of the drawings you will use as reference, lines may appear cooked or skewed. Always refer to the class handouts when recreating drawings.

30. The DRAW Toolbar POLYLINE (PLINE) Creates a 2D polyline
a single object that is composed of line and arc segments.
A 2D polyline is a connected sequence of segments created as a single planar object.

31. The DRAW Toolbar RECTANGLES (RECTANG) Creates a rectangular polyline.
You can specify the rectangle parameters (length, width, rotation) and control the type of corners.

32. The DRAW Toolbar CIRCLE
A closed curve with a constant radius around a center point.
Tangent a line circle or arc that meets another circle or arc at only one point

33. The DRAW Toolbar POLYGON Creates an equilateral closed polyline
Inscribed in Circle: Specifies the radius of a circle on which all vertices of the polygon lie within.
Circumscribed about Circle: Specifies the distance from the center of the polygon to the midpoints of the edges of the polygon.

34. The DRAW Toolbar ELLIPSE
An oval shape that contains two centers of equal radius
Major axis the longer of the two axes.
Minor Axis the shorter of the two axes.

35. THINK ABOUT IT What commands might you use to complete this drawing?
Can you think of two different approaches?
Drawing 5
Drawings represented in presentations are for reference only. Because they are pictures of the drawings you will use as reference, lines may appear cooked or skewed. Always refer to the class handouts when recreating drawings.