Repeat the above steps and complete the freehand sketch by adding three more lines (from point 3 to point 4, point 4 to point 5, and then connect to point 5 back to point 1). Move the cursor to the left of point 2 and create a horizontal line about the same length as the first line on the screen. Left-click again (point 2) and we have created the first line of our sketch.ħ. Notice the rubber-band line that follows the graphics cursor in the graphics window. Next move the cursor upward and toward the right side of point 1.
Left-click once to position the starting point of our first line. We will start at a location about one-third from the bottom of the graphics window.
This exercise is to give you a feel for the AutoCAD® 2002 user interface.Ħ. Do not be overly concerned with the actual size or the accuracy of your freehand sketch. We will create the sketch near the center of the drawing window. We will create a freehand sketch of a fivepoint star using the Line command. We can treat the graphics window as if it was a piece of paper and we are using the graphics cursor as if it were a pencil with which to draw.Ĭoordinates of the location of the graphics cursor.ĥ. The three numbers represent the location of the cursor in the X, Y, and Z directions. Move the graphics cursor inside the graphics window and watch the display of the coordinates of the graphics cursor at the bottom of the AutoCAD drawing screen. AutoCAD expects us to identify the starting location of a straight line. In the command prompt area, near the bottom of the AutoCAD drawing screen, the message “_line Specify first point:” is displayed. It is highly recommended that you read the explanations to gain some insights on the basic assumptions and general procedure of using AutoCAD.Ĥ. Notice a brief explanation of the selected command is displayed in the Active Assistance window. Select the icon by clicking once with the left-mousebutton this will activate the Line command. A help-tip box appears next to the cursor and a brief description of the icon is displayed at the bottom of the AutoCAD drawing screen: “Creates Straight line segments: LINE.” 3. Move the graphics cursor to the first icon in the Draw toolbar. Click on the Active Assistance icon to activate the option.Ģ. The second graphics window (Drawing2) was opened when we chose to create a new drawing from scratch using the default English units. In our example, AutoCAD opened the first graphics window (Drawing1), using the default system units. AutoCAD automatically assigns generic names, Drawing X, as new drawings are created. Note that two graphics windows, Drawing1 and Drawing2, are opened. In the Default Settings section, pick English (feet and Inches) as the drawing units. Confirm the startup option is set to Start from Scratch, as shown in the figure below.Ĥ. In the AutoCAD Today startup dialog box, select the Create Drawings tab with a single click of the left-mouse-button.ģ. Once the program is loaded into memory, the AutoCAD® 2002 drawing screen and the AutoCAD Today startup dialog box will appear on the screen.Ģ. Select the AutoCAD 2002 option on the Program menu or select the AutoCAD 2002 icon on the Desktop. In this lesson, we will examine the different ways of creating lines and circles in AutoCAD® 2002. As we gain some experience in creating lines and circles, similar procedures can be applied to create other geometric entities.
Ellipses and Splines can be constructed by connecting arcs with different radii. In examining the different types of planar geometric entities, we can see that triangles and polygons are planar figures bounded by straight lines. Straight lines and circles are used in almost all technical designs. In learning to use a CAD system, lines and circles are the first two, and perhaps the most important two, geometric entities that we need to master the skills of creating and modifying. In order to become effective in using a CAD system, we must learn to create geometric entities quickly and accurately. The method and number of operations that are required to accomplish the constructions are different from one system to another. Many of the constructions used in technical designs are based upon two-dimensional planar geometry. All CAD systems create designs using basic geometric entities. This will require learning some new concepts and skills as well as learning a different vocabulary.
#2D AUTOCAD PRACTICE DRAWINGS PDF HOW TO#
We need to begin with the basic alphabet and learn how to use it correctly and effectively through practice. Introduction Learning to use a CAD system is similar to learning a new language. ♦ Define Positions using the Basic Entry methods. ♦ Draw, using the LINE and CIRCLE commands. ♦ Use the AutoCAD visual reference commands. Schroff Development Corporation AutoCAD® 2002 Tutorial An audioi/visual presentation of the tutorial exercises