The command sequence would look like this:. This method provides a good alternative to using relative cartesian co-ordinates for determining length and width. See the Using Co-ordinates tutorial for more details. The Polygon command can be used to draw any regular polygon from 3 sides up to sides. This command requires four inputs from the user, the number of sides, a pick point for the centre of the polygon, whether you want the polygon inscribed or circumscribed and then a pick point which determines both the radius of this imaginary circle and the orientation of the polygon.
The polygon command creates a closed polyline in the shape of the required polygon. This command also allows you to define the polygon by entering the length of a side using the Edge option. You can also control the size of the polygon by entering an exact radius for the circle. Follow the command sequence below to see how this command works. In the illustration above, the polygon on the left is inscribed inside the circle with the polygon vertexes touching it , the one in the middle is circumscribed outside the circle with the polyline edges tangential to it and the one on the right is defined by the length of an edge.
This command draws a solid donut shape, actually it's just a closed polyline consisting of two arc segments which have been given a width. AutoCAD asks you to define the inside diameter i. The donut is then drawn in outline and you are asked to pick the centre point in order to position the donut. You can continue picking centre points to draw more donuts or you can hit to end the command. Surprisingly, donuts are constructed from single closed polylines composed of two arc segments which have been given a width.
Fortunately AutoCAD works all this out for you, so all you see is a donut. As an alternative to picking two points or entering a value for the diameters, you could just hit to accept the default value. Most AutoCAD commands that require user input have default values. Curiously enough AutoCAD doesn't seem to mind if you make the inside diameter of a donut larger than the outside diameter, try it and see.
The Revcloud command is used to draw a "freehand" revision cloud or to convert any closed shape into a revision cloud. Move the mouse to form a closed shape; the command automatically ends when a closed shape is formed. Revision cloud finished. You can use the "Arc length" option to control the scale of the revision cloud. This is achieved by specifying the minimum and maximum arc length.
The "Object" option is used to transform any closed shape, such as a polyline, spline or circle into a revision cloud. The 3D Polyline command works in exactly the same way as the Polyline command. The main difference between a normal polyline and a 3D polyline is that each vertex pick point of a 3D polyline can have a different value for Z height. In normal 2D polylines, all vertexes must have the same Z value. For example, they cannot contain arc segments and they cannot be given widths.
However, they can be very useful for 3D modeling. Notice that you are not prompted for a Z value each time you pick a point. You must either use one of the Object Snaps to pick a point with the required Z value or use the ". Along with Line and Polyline, the Circle command is probably one of the most frequently used. Fortunately it is also one of the simplest.
However, in common with the other commands in this section there are a number of options that can help you construct just the circle you need. Most of these options are self explanatory but in some cases it can be quite confusing. The Circle command, for example, offers 6 ways to create a circle, while the Arc command offers 10 different methods for drawing an arc. The sections below concentrate mainly on the default options but feel free to experiment.
The Circle command is used to draw circles. There are a number of ways you can define the circle. The default method is to pick the centre point and then to either pick a second point on the circumference of the circle or enter the circle radius at the keyboard. You can choose to use the alternative options by typing them at the prompt. For example, the circle command gives you three extra options to define a circle. Obviously to use this last option you need to have drawn two lines which you can use as tangents to the circle.
Try these options out to see how they work. Note that to invoke a command option, you need only type the upper-case part of the option name. For example, if you want to use the Ttr option, you need only enter "T". There are two more circle options on the pull-down menu that enable you to draw a circle by defining the center and diameter or by using 3 tangents.
The Arc command allows you to draw an arc of a circle. There are numerous ways to define an arc, the default method uses three pick points, a start point, a second point and an end point. Using this method, the drawn arc will start at the first pick point, pass through the second point and end at the third point. Once you have mastered the default method try some of the others. You may, for example need to draw an arc with a specific radius.
All of the Arc command options are available from the pull-down menu. It is also possible to create an arc by trimming a circle object. In practice, many arcs are actually created this way.
See the Trim command on the Modifying Objects tutorial for details. A spline is a smooth curve that is fitted along a number of control points. The Fit Tolerance option can be used to control how closely the spline conforms to the control points. A low tolerance value causes the spline to form close to the control points.
A tolerance of 0 zero forces the spline to pass through the control points. The illustration on the right shows the effect of different tolerance values on a spline that is defined using the same four control points, P1, P2, P3 and P4. Using this command, you can change the tolerance, add more control points move control points and close splines, amongst other things. However, if you just want to move spline control points, it is best to use grips.
See the Stretching with Grips section of the Modifying Objects tutorial for details. You can create linear approximations to splines by smoothing polylines with the PEDIT command, Modify Polyline from the pull-down menu.
However, you can also turn polylines into true splines using the Object option of the Spline command. The Ellipse command gives you a number of different creation options. The default option is to pick the two end points of an axis and then a third point to define the eccentricity of the ellipse. After you have mastered the default option, try out the others. The ellipse command can also be used to draw isometric circles. See the worked example in the Drawing Aids tutorial to find out how to do this and how to draw in isometric projection with AutoCAD.
The Ellipse Arc command is very similar to the Ellipse command, described above. The only difference is that, in addition to specifying the two axis end points and the "distance to other axis" point, you are prompted for a start and end angle for the arc.
You may specify angles by picking points or by entering values at the command prompt. Remember that angles are measured in an anti-clockwise direction, starting at the 3 o'clock position. In truth, the Ellipse Arc command is not a new or separate command; it is just an option of the Ellipse command and it therefore has no unique command line name. It is curious why Autodesk considered this option important enough to give it it's own button on the Draw toolbar.
Still, there it is. A region is a surface created from objects that form a closed shape, known as a loop. The Region command is used to transform objects into regions rather than actually drawing them i. Once a region is created, there may be little visual difference to the drawing. However, if you set the shade mode to "Flat Shaded", View Shade Flat Shaded , you will see that the region is, in fact, a surface and not simply an outline.
Regions are particularly useful in 3D modeling because they can be extruded. Before starting the Region command, draw a closed shape such as a rectangle, circle or any closed polyline or spline. A Wipeout is an image type object. Most commonly it is used to "mask" part of a drawing for clarity. For example, you may want to add text to a complicated part of a drawing. A Wipeout could be used to mask an area behind some text so that the text can easily be read, as in the example shown on the right.
The Wipeout command can be used for 3 different operations. It can be used to draw a wipeout object, as you might expect, but it can also be used to convert an existing closed polyline into a wipeout and it can be used to control the visibility of wipeout frames. You can use as many points as you wish in order to create the shape you need. When you have picked the last point, use right-click and Enter or hit the Enter key on the keyboard to complete the command and create the wipeout.
You may find that it is easier to draw a polyline first and then convert that polyline into a wipeout. To do this, start the Wipeout command and then Enter to select the default "Polyline" option. Select the polyline when prompted to do so. Remember, polylines must be closed before they can be converted to wipeouts.
The Frames option is used to turn frames off or on for all wipeouts in the current drawing. You cannot control the visibility of wipeout frames individually. Select objects : Select the circle with the pick box on the line when the circle is highlighted press the ENTER key on the keyboard.
Select objects : 1 found This line ask you if you would like to select more objects if not press ENTER on the keyboard. Specify base point of displacement : Pick with the near the center of the circle 6. Move the object to the location you desire and click down with the mouse. Command used to mirror an object to the side of another object 1. Draw a rectangle any size using the rectangle command 2. Select objects : Select the rectangle with the pick box on the line 4. Specify point on mirror line : Move your cursor to the right and above a short distance from the rectangle.
Click down with the mouse. Specify first point of mirror line : Specify second point of mirror line: move your cursor down a short distance then click down with the mouse 7. Delete source objects Type in : N Press enter An exact duplicate of the rectangle you created in step 2 will be created to the right Note: If you create a mirror line above the rectangle an exact duplicate of the rectangle will be created above.
You can mirror any object in the drawing area text, lines, circles, views, etc. Command used to offset one object from another 1. Draw a circle and a line of any diameter any length 2. Select object to offset Select the line with the pick box. An exact duplicate of the first line you selected in step 4 is created just above.
If you would have picked the line you in step an exact duplicate be created. You can offset almost any object in the drawing area. You can offset text. You can also offset a circle to the inside or outside itself. To offset inside a circle click inside the circle. To offset outside the circle click outside the circle. Command used to extend one line to another 1. Draw two lines one horizontal and one vertical. Draw the vertical line a short distance away from the horizontal line. Select boundary edges.
Select objects the vertical line the line you want to extend to. Select objects to extend Select the right end point of the horizontal line with the pick box. The horizontal line will now extend to the vertical line.
Press the ESC key on the keyboard to cancel the command. How to do a rectangular array 1. Start a new drawing from scratch. Draw a polygon, 6 sides, inscribed, with a radius of. Click on OK Note: The row and offset distance is taken from the center of the polygon. How to do a polar array 1. Draw two circles diameter 2.
Click on OK. Command used to scale an object larger or smaller in size 1. Draw circle of any diameter 2. Specify base point : Click near the center of the circle with the cursor.
Specify scale factor or reference: Type in 2 press enter on the keyboard. This makes the circle 2 times its original size if you were to type in 50 it would make the circle-half its original size.
This can be done with any object created the AutoCAD drawing area a percentage less than 1 makes the object smaller A percentage more than 1 makes the object bigger. A percentage of 1 has know effect on the object. Command used to move an object from one location to another in the drawing area 1. Draw a circle of any diameter 2. Click on the MOVE icon in the edit toolbar 3. Specify basepoint of displacement Select near the center of the circle with the cursor. Specify second point of displacement.
If you move your cursor around little in the drawing area you can see what is called rubberbanding 6. Click down the mouse anywhere within the drawing area at the desired location for the move.
Command used rotate an object around a point you pick 1. Draw a rectangle with only two equal sides rectangle command 2. Specify base point select somewhere near the center of the rectangle with the cursor. Specify rotation angle At this point you can type in an angle of rotation at the command line or by moving your mouse around you can dynamically see the rotation angle, then click down with the mouse when you like the rotation angle.
Command used to trim one line back from another line 1. Draw two overlapping line one horizontal and one vertical 2. Click on the TRIM icon from the edit toolbar 3. Select cutting edges. Select objects : Select the Vertical line with the pick box this will be your cutting edge. Select object to trim : Select the horizontal line the part to the right of the vertical line this is your object to trim.
CAM stands for Computer-Aided Manufacturing and referes to the use of software to control machine tools used in manufacturing processes. Enabling faster, accurate and more precise production of components, CAM is usually the next step after computer-aided design CAD.
Computer Aided Manufacturing CAM is the use of software and computer-controlled machinery to automate a manufacturing process. Software that tells a machine how to make a product by generating toolpaths. Machinery that can turn raw material into a finished product. If a user is working offline, then by pressing this key, all the functionalities of this software will be opened in PDF format. All of the Modify tools are available from the Modify pull-down and the Modify toolbar.
In each section below, the toolbar, pull-down and keyboard options are given. The method you choose is entirely up to you. You can also create your own toolbars. A toolbar can be floating or docked.
A floating toolbar can be displayed anywhere on your screen, and you can drag it to a new location, resize it, or dock it. A docked toolbar can be attached to any edge of the drawing area. The circle command is used to draw a circle by specifying the center point and radius. Let's understand by two examples. Type Circle or C on the command line and press Enter. Using the Line command, a line can be drawn between any two points picked within the drawing area. Ortho only addresses degree angles, Polar can be set to any increment angle you want as low as 1-degree.
The Polar Mode in 3D provides an additional alignment in the upward and downward direction other than polar angles. The Tooltip, which is present near the cursor displays the distance and the angle. The fillet command is used to create rounded edges between the adjacent lines and faces in 2D and 3D. It is also used to connect two tangent arcs in 2D. Specify the radius of the Fillet and press Enter.
Example: A circle between three edges. The steps to create a three-point circle are listed below: Create three edges. The command starts Tangent object snap mode. Select the first object to draw the circle tangent to. Select the second object to draw the circle tangent to. Specify the radius of the circle. Polyline geometries are made up of two or more vertices forming a connected line. Polygon geometries are made up of at least four vertices forming an enclosed area.
The first and last vertices are always in the same place. A polygon is a figure formed by the finite number of line segments connected to form a closed circuit. The triangle is a figure with three sides, and an octagon is a figure with eight sides. The polygon command is used to create polygons in AutoCAD. We need to specify the number of sides to create a polygon.
On December 18, What are the different basic drawing commands? How many types of drawing commands are there? What are AutoCAD commands?
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