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CMU ARC 48568 - AutoCAD 2D Tutorial

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AutoCAD 2D Tutorial - 24 - Chapter 3 Draw CommandsAutoCAD 2D Tutorial - 25 - 3.1 Line Command Creates single straight line segments 1. Choose Draw, Line. or 2. Click the Line icon. or 3. Type LINE from the command prompt Command: LINE or L 4. Press ENTER 5. Pick From point: (point) 6. Pick Specify next point or [Close/Undo]:(point) 7. Pick Specify next point or [Close/Undo]:(point) 8. Press ENTER to end line sequence or 9. Type U to undo the last segment To point: U (undo) or 10. Type C to create a closed polygon To point : C (close) TIPS: • You can continue the previous line or arc by responding to the From point: prompt with a space or ENTER. • Choose the right mouse button for the line pop-up menu to appear while in the line commandAutoCAD 2D Tutorial - 26 - 3.2 Cartesian Coordinate System AutoCAD provides the user with an infinite two dimensional area to work with. Any entities place on the working two dimensional plane can be defined relative to the Cartesian coordinate system. The Cartesian coordinate system divides a two dimensional plane with two perpendicular axis. The X axis runs horizontal across the bottom of the screen. The Y axis runs vertically along the left side of the screen. These two axis intersect at the bottom left corner of the screen. Each of these axis is further divided into segments. Each segment is given a value. The X axis segments increase in value to the right. The positive X values are to the right of the intersection of the two axis. The negative X values are to the left. The positive Y values are above the intersection and increase up. The negative Y values are below.AutoCAD 2D Tutorial - 27 - Absolute Coordinates 1. Type x,y coordinate when AutoCAD asks for a point. From point: 1,1 To point: 2,1 To point: 2,2 To point: 1,2 To point: 1,1 Relative Coordinates 1. Type @deltax,deltay when AutoCAD asks for a point. From point pick point To point: @1,0 To point: @0,1 To point: @-1,0 To point: @0,-1 Polar Coordinates 1. Type @distance<angle when AutoCAD asks for a point. From point: pick point To point:@1<0 To point:@1<90 To point:@1<180 To point:@1<270AutoCAD 2D Tutorial - 28 - 3.3 Dynamic Input Dynamic Input provides a command interface near the cursor to help you keep your focus in the drafting area. When Dynamic Input is on, tooltips display information near the cursor that is dynamically updated as the cursor moves. When a command is active, the tooltips provide a place for user entry. Turning Dynamic Input ON/OFF 1. Click Dyn on the status bar or 2. Press F12 Tip: Right-click Dyn and click Settings to control what is displayed by each component when Dynamic Input is on.AutoCAD 2D Tutorial - 29 - 3.4 Orthogonal Lines Controls lines from being drawn at various angles to straight lines. When the snap grid is rotated, ortho mode rotates accordingly. 1. Press Function Key F8. or 2. Double Click ORTHO from the Status Bar. or 3. Press CTRL + L. Line drawn with ORTHO ON Line drawn with ORTHOAutoCAD 2D Tutorial - 30 - 3.5 Polar Tracking Polar Snaps work independently from snaps. With Polar Snaps on, AutoCAD shows the distances and angles being displayed as the cursor moves. 1. Choose Tools, Drafting Settings or 2. Type DDSETTINGS at the command prompt. Command : DDESTTINGS 3. Choose the Polar trackingTAB from the dialog box. 4. Select the desired incremental angle from the dropdown list (or create a new angle). 5. Pick OK to exit the dialog box. 6. Draw a LINE using the Polar Snap references.AutoCAD 2D Tutorial - 31 - 3.6 Circles Circle Command 1. Choose Draw, Circle. or 2. Click the Circle icon. or 3. Type CIRCLE at the command prompt. Command: CIRCLE 4. Type One of the following options: 3P/2P/TTR/<<center point>>: or 5. Pick A center point. 6. Type A radius or diameter. or 7. Pick A radius or diameter Diameter/<<radius>>: TIPS: - To create circles that are the same size, press ENTER when asked for the circle radius. - When selecting a circle with a pickbox, be sure to select the circumference of the circle. Circle, Center Radius Circle, Center Diameter Circle, Tangent, Tangent Radius Circle, Tangent, Tangent, TangentAutoCAD 2D Tutorial - 32 - 3.7 Arc Command 1. Choose Draw, Arc. or 2. Click the Arc icon. or 3. Type ARC at the command prompt Command: ARC 4. Draw One of the arcs. TIPS: -Except for 3 point arcs, arcs are drawn in a COUNTERCLOCKWISE direction. - While in the arc command, press the right mouse button to select the following options for arcs: Arc Examples 3 point arc Start ,center, chord length start, center, end Start, end, radius Start , center, included angle Start, end,


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