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ME1720 Software, AutoCAD 2D Lesson 2 – Editing Document URL: http://ide20.com/upload/ModuleAC/Lesson02_2014JBS.pdf Developer: [email protected], 8/2015 update by [email protected]

Copyright 2015, Missouri S&T

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AutoCAD 2D Lesson 2 – Editing Pre-reqs/Technical Skills

• Basic computer use • Completion of AutoCAD Lesson 1

Expectations • Read lesson material • Implement steps in software while reading through lesson material • Complete quiz on Blackboard • Submit completed assignment on Blackboard • Ask questions as needed

Objectives/Measurables • Learn to edit drawing elements in AutoCAD, measured via assignment score • Learn various features in AutoCAD, measured via Blackboard quiz score

Lecture Topics • Editing drawing objects

Table of Contents

AutoCAD 2D ........................................................................................................................................ 1 Lesson 2 – Editing ................................................................................................................................................................................... 1

Pre-reqs/Technical Skills ........................................................................................................................................................................... 1 Expectations ..................................................................................................................................................................................................... 1 Objectives/Measurables ............................................................................................................................................................................. 1 Lecture Topics ................................................................................................................................................................................................. 1

Introduction – AutoCAD 2014 ............................................................................................................................................................ 1 Editing .......................................................................................................................................................................................................... 2

Moving ................................................................................................................................................................................................................ 2 Rotating ............................................................................................................................................................................................................. 3 Offsetting ........................................................................................................................................................................................................... 5 Mirroring ........................................................................................................................................................................................................... 6 Copying ............................................................................................................................................................................................................... 8 Arraying ............................................................................................................................................................................................................. 9 Chamfer/Fillet .............................................................................................................................................................................................. 11

Assignment ............................................................................................................................................................................................... 16

Introduction – AutoCAD 2014 AutoCAD is a 2D and 3D computer aided drafting (CAD) program. It is used primarily for mechanical and architectural drafting. Essentially, it provides a computer-based method for producing engineering drawings. The 2010+ versions integrates the Windows Ribbon interface which may be unfamiliar to those who have used earlier versions. This module uses the default Ribbon interface and is designed for those new to AutoCAD or those who wish to use the new Ribbon interface.

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Editing AutoCAD includes several features for editing previously drawn objects. These features include moving, rotating, offsetting, mirroring, copying and arraying. Each of these features and their uses will be covered in this tutorial.

Moving To move an object, or group of objects, use the Move feature. Move can be found in the Modify pane of the Home tab (Figure 1).

Figure 1 - Move

To use the Move feature, click the Move button (shown in Figure 1). Now select the objects to move. You can left-click each object in turn to select them (Ctrl or Shift clicking is not necessary) or use the click-drag techniques covered in Lesson 1. Hit the Enter key to move to the next step. AutoCAD will prompt for a base point (Figure 2), this point is used as a reference point for the Move feature. You can click to select a point or enter the point manually by typing in the x-coordinate, a comma and then the y-coordinate. Press Enter to move to the next step.

Figure 2 - Move: Select Base Point




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AutoCAD will prompt for a second point (Figure 3). Once selected, AutoCAD will move the objects along a vector from the first point to the second point based on the distance between these points. The second point can be selected with a click or entered manually. Press the Enter key to complete the move.

Figure 3 - Move: Select Second Point

Rotating Rotating objects works similarly to moving objects. To rotate, select the Rotate button in the Modify pane of the Home tab (Figure 4).

Figure 4 - Rotate

After clicking the Rotate button, you must select the objects to be rotated. Use the same techniques as for moving objects. Once selected, hit the Enter key to move to the next step. Like moving, you must select a base point (Figure 5). This can be clicked or entered manually. The object(s) will be rotated about the base point.




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Figure 5 - Rotate: Specify Base Point

The next step is to set the rotation angle (Figure 6). This can be set by moving the cursor until the object is at the desired angle or by entering an angle manually by typing it in (in degrees) and then hitting the Enter key. Unless rotating an object for aesthetic reasons, it is generally a good idea to enter rotation angles manually to ensure that they are correct.

Figure 6 - Rotate: Specify Rotation Angle

Once the angle is selected, the object(s) will be rotated (Figure 7).

Figure 7 - A Rotated Object




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Offsetting When you need to create an object similar to an existing object, but translated a fixed distance away, the Offset command can be used. To offset an object, select Offset in the Modify pane of the Home tab (Figure 8).

Figure 8 - Offset

Unlike moving and copying, selecting objects is not the first step in offsetting. AutoCAD will first prompt for an offset distance (Figure 9). This is the distance the object will be moved when copied. Enter the distance using the number keys and press Enter when done.

Figure 9 - Offset: Setting the Distance

Now AutoCAD will prompt to select the objects to offset. Only one object at a time can be selected (Figure 10).

Figure 10 - Offset: Selecting Objects




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Once selected, AutoCAD will prompt for a point on the side to offset to (Figure 11). This does not need to be a precise point, just click on the side you want the new object to appear (this distance set during the first step will be used, AutoCAD just needs to know which way to offset).

Figure 11 - Offset: Picking a Side

The object will be offset (Figure 12), and AutoCAD will prompt for another object to offset. The original distance will be used for any additional offsets. To cancel the Offset command, press the Esc key.

Figure 12 - An Offset Line

Mirroring To copy or move objects by mirroring them about a line, use the Mirror command. The Mirror feature is started by clicking the Mirror button in the Modify pane of the Home tab (Figure 13).

Figure 13 - Mirror




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Like moving objects, the first step to mirroring objects is to select them. Once selected, AutoCAD will prompt for the first point of the mirror line (Figure 14). This is the line the objects will be mirrored across (it defines the plane of the mirror). This point can be entered manually or selected with a click.

Figure 14 - Mirror: First Mirror Line Point

AutoCAD will then prompt for the second point of the mirror line (Figure 15). Once again, this can be entered manually or simply clicked.

Figure 15 - Mirror: Second Mirror Line Point

Now AutoCAD will prompt on whether or not to erase the source object. If you type Y, the originally selected objects will be deleted. If you type N, the original objects will be kept and new objects created that mirror the original ones (Figure 16).

Figure 16 - A Mirrored Object




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Copying Copying works similarly to moving but leaves the original object(s) intact. To activate the Copy feature, click the Copy button in the Modify pane of the Home tab (Figure 17).

Figure 17 - Copy

Like with moving objects, the first step is to select the object(s) to copy. Once objects are selected, a base point must be selected (Figure 18).

Figure 18 - Copy: Specifying the Base Point

Once a base point is selected, a second point must be selected. This second point will be used like in the Move feature (Figure 19). However, unlike Move, AutoCAD will prompt for more points after copying the object. This allows you to quickly make several copies of the originally selected objects (Figure 20).




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Figure 19 - Copy: Specifying the Second Point

Figure 20 - Multiple Copies

Arraying If you need to make several copies of an object that are translated or rotated at fixed increments, you can use the Array feature. Start the Array feature by clicking the arrow next to Array button in the Modify pane of the Home tab (Figure 21).

Figure 21 - Array

This lets you choose the kind of array to be made (rectangular, path, or polar). Start off by selecting a rectangular array. Then you will select the object(s) to be arrayed by left clicking on them and pressing Enter. Array options will now appear in the top pane (Figure 22).




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Figure 22 – Array Options (rectangular)

Experiment with the row and column options and watch how the array changes. To change the number and distances between the rows and columns, enter values into the boxes in the array options pane. You can also adjust the array by selecting the grips within the objects and clicking on a new location to adjust the column/row spacing (Figure 23). Click on “Close Array” in the array options pane or press ESC when you are finished editing the array.

Figure 23 – Array – Adjust column spacing by selecting grips

If you need to array objects circularly about a point, select the Polar Array option in the Modify pane of the Home tab. You will again be prompted to select the objects to be arrayed. After selecting the objects and pressing “Enter,” you will be prompted to select the center point for the array (Figure 24). You can do this by clicking or entering the point coordinates manually.




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Figure 24 –Polar Array – select center point

Once you have selected the center point, a polar array options pane will appear (Figure 25), and you can set the number of, angles, and spacing of the objects in the array. As with the rectangular array, you can also adjust the array by clicking and moving the grips. When you are done creating the array, click “Close Array” or press ESC.

Figure 25 – Polar Array: Options pane and the resulting polar array are shown.

Chamfer/Fillet Chamfers and Fillets are used to break sharp corners. A chamfer breaks the corner with a straight line segment. A fillet breaks the corner with a circular arc (Figure 26).




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Figure 26 - Chamfer and Fillet

To chamfer a corner, select the Chamfer button in the Modify pane of the Home tab (Figure 27).

Figure 27 - Chamfer

AutoCAD will immediately prompt for the objects to chamfer. Unless you have previously set chamfer distances, you must set them now. To set the chamfer distances, type “distance” and press the Enter key (Figure 28).

Figure 28 - Chamfer: Setting the Distance

AutoCAD will now prompt for the first chamfer distance (look towards the bottom of the screen in the big text box). Type this distance in and press the Enter key. AutoCAD will them prompt for the second distance, type




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this in as well and press Enter. For a visual representation of what these distances mean, see Figure 27. Once the distances are entered, you will need to select the two objects to chamfer in order (Figure 29 and Figure 30).

Figure 29 - Chamfer: Picking the First Line

Figure 30 - Chamfer: Picking the Second Line

Once the two items are selected, the chamfer will be applied (Figure 31).

Figure 31 - Finished Chamfer

To create a fillet, click the Fillet button in the Modify pane of the Home tab (Figure 32).




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Figure 32 - Fillet

Like with Chamfer, Fillet requires you enter the operation parameters (in this case the fillet radius) before you select the objects. To enter the radius, type “radius” then press Enter (Figure 33).

Figure 33 - Fillet: Setting the Radius

AutoCAD will then prompt for a radius for the chamfer. Type this number then press Enter (Figure 34).

Figure 34 – Fillet: Entering the Radius




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Like chamfer, two objects will need to be selected for the fillet. Once selected, the filet will be applied (Figure 35).

Figure 35 - A Finished Fillet

Wrapping Up You now have seen several of AutoCAD’s object editing features. These features can be used in conjunction with the basic drawing features to create complex objects. Experiment with these features and complete the following assignment.




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Assignment Create a drawing in AutoCAD that includes the following features (points are in parentheses):

• A square rotated 30 degrees clockwise (2) • A triangle mirrored about a vertical line (2) • A square with all four sides offset to the outside (2) • A circle arrayed rectangularly with 2 columns and 4 rows (3) • A square polar arrayed around 360 degrees with 5 total copies (including the original) (3) • A square with a fillet and a chamfer (3)

An example is shown in Figure 36. Submit a .dwg file to the appropriate link under Assignments in Blackboard.

Figure 36 - Assignment Example


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