AutoCAD® Pocket Reference
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About this ebook
Cheryl R. Shrock
Cheryl R. Shrock recently retired as Professor and Chairperson of Computer Aided Design at Orange Coast College (CA) where she had taught since 1990. She is an Autodesk® registered author. Previous to teaching, she owned and operated a commercial product and machine design company, using CAD to create and document designs. This book draws upon both her teaching and industry experience.
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AutoCAD® Pocket Reference - Cheryl R. Shrock
Section 1
Action Commands
ARRAY
The ARRAY command allows you to make multiple copies in a RECTANGULAR or Circular (POLAR) pattern and even on a PATH. The maximum limit of copies per array is 100,000. This limit can be changed but should accommodate most users. (Refer to the Help menu if you choose to change the limit)
RECTANGULAR ARRAY
This method allows you to make multiple copies of object(s) in a rectangular pattern. You specify the number of rows (horizontal), columns (vertical) and the spacing between the rows and columns. The spacing will be equally spaced between copies.
Spacing is sometimes tricky to understand. Read this carefully. The spacing is the distance from a specific location on the original to that same location on the future copy. It is not just the space in between the two. Refer to the example below.
To use the rectangular array command you will select the object(s), specify how many rows and columns desired and the spacing for the rows and the columns.
Refer to step by step instructions on page 1-3.
Example of a Rectangular Array:
How to create a RECTANGULAR ARRAY
1. Draw a 1" (Inch) Square Rectangle.
2. Select the ARRAY command using one of the following:
3. Select Rectangular Array.
4. Select Objects: Select the Object to be Arrayed
5. Select Objects: Select more objects or
The Array Creation tab appears with a 3 × 4 grid array of the object selected.
6. Make any changes necessary in the Array Creation tab, then press
7. If the display is correct select Close Array.
How to edit a RECTANGULAR ARRAY
1. Select the Array to edit.
The Array panel is displayed. (The Quick Properties will also be displayed if you have the QP button ON in the Status bar.)
2. Make any changes necessary in the Array Creation tab, then press
3. If the display is correct select Close Array.
How to edit a RECTANGULAR ARRAY
Using Grips to edit.
You may also use the Grips to edit the spacing. Just click on a grip and drag.
A. The first or allows you to change the spacing between the columns or rows.
B. The last or allows you to change the total spacing between the base point and the last or and also to add extra columns or rows, or change the axis angle.
C. The allows you to change the total row and column spacing simultaneously, and also to add extra columns and rows simultaneously.
D. Use the Base Point grip to MOVE the entire Array.
How to edit a RECTANGULAR ARRAY
Using Grips to edit.
POLAR ARRAY
This method allows you to make multiple copies in a circular pattern. You specify the total number of copies to fill a specific Angle or specify the angle between each copy and angle to fill.
To use the polar array command you select the object(s) to array, specify the center of the array, specify the number of copies or the angle between the copies, the angle to fill and if you would like the copies to rotate as they are copied.
Example of a Polar Array
Note: the two examples shown above use the objects default base point. The examples below display what happens if you specify a basepoint.
How to create a POLAR ARRAY
Using Number of Items
.
1. Draw a 3" Radius circle.
2. Add a .50 Radius 3 sided Polygon and place as shown.
3. Select the ARRAY command using one of the following:
4. Select Polar Array.
5. Select Objects: Select the Object to be Arrayed. (Polygon)
6. Select Objects: Select more objects or
7. Specify center point of array or [Base point / Axis of Rotation] Select the Center Point of the Circle
The Array Creation tab appears and the array defaults to 6 items.
8. Enter Items: 12
9. Enter Fill: 360
10. Press
11. Select Close Array if display is correct
Note:
12 items were evenly distributed within 360 degrees
How to create a POLAR ARRAY
Using Angle Between
.
1. Draw a 3" Radius circle.
2. Add a .50 Radius 3 sided Polygon and place as shown.
3. Select the ARRAY command using one of the following:
4. Select Polar Array.
5. Select Objects: Select the Object to be Arrayed. (Polygon)
6. Select Objects: Select more objects or
7. Specify center point of array or [Base point / Axis of Rotation] Select the Center Point of the Circle
The Array Creation tab appears and the array defaults to 6 items.
8. Enter Items: 6
9. Enter Between: 45
10. Press
11. Select Close Array if display is correct
Note:
6 items were copied at each 45 degree ccw
How to create a POLAR ARRAY
Using Fill Angle
.
1. Draw a 3" Radius circle.
2. Add a .50 Radius 3 sided Polygon and place as shown.
3. Select the ARRAY command using one of the following:
4. Select Polar Array.
5. Select Objects: Select the Object to be Arrayed. (Polygon)
6. Select Objects: Select more objects or
7. Specify center point of array or [Base point / Axis of Rotation] Select the Center Point of the Circle
The Array Creation tab appears and the array defaults to 6 items.
8. Enter Items: 8
9. Enter Fill: 180
10. Press
11. Select Close Array if display is correct
Note:
8 items were evenly distributed within 180 degrees
How to create a PATH ARRAY
1. Draw a Line 6" long at 20 degrees..
2. Add a 0.500 × 0.500
Rectangle as shown.
3. Select the ARRAY command using one of the following:
4. Select Path Array.
5. Select Objects: Select the Object to be Arrayed. (The small Rectangle)
6. Select Objects: Select more objects or
7. Specify Path Curve: Select the Path. (The angled Line)
Note: The Path can be a line, polyline, spline, helix, arc, circle or ellipse.
The Array Creation tab appears and the array defaults to 9 items.
8. Make any alterations and press
9. If correct select Close Array.
BREAK
The BREAK command allows you to break an object at a single point (Break at Point) or between two points (Break). I think of it as breaking a single line segment into two segments or taking a bite out of an object.
METHOD 1 - Break at a Single Point
How to break one Line into two separate objects with no visible space in between.
1. Select the BREAK AT POINT command by using:
2. _break Select objects: select the object to break (P1).
3. Specify first break point: select break location (P2) accurately.
Note:
The single line is now 2 lines but no gap in between the 2 lines. For example, a 2 inch long line would become two 1 inch lines butted together.
METHOD 2 - Break between 2 points. (Take a bite out of an object)
Use this method if the location of the BREAK is not important.
1. Select the BREAK command by using one of the following:
2. _break Select objects: select the object to break (P1).
3. Specify first break point: select break location (P2) accurately.
Note:
A. Circles break Counter clockwise. (CCW)
B. Circles can’t be broken with 1 point
. You must use 2 points.
The following method is the same as method 2 above; however, use this method if the location of the break is very specific.
1. Select the BREAK command.
2. _break Select objects: select the object to break (P1) anywhere on the object.
3. Specify second break point or [First point]: type F
4. Specify first break point: select the first break location (P2) accurately.
5. Specify second break point: select the second break location (P3) accurately.
CHAMFER
The CHAMFER command allows you to create a chamfered corner on two lines. There are two methods: Distance (below) and Angle (next page).
DISTANCE METHOD
Distance Method requires input of a distance for each side of the corner.
1. Select the CHAMFER command using one of the following:
Command: _chamfer
(TRIM mode) Current chamfer Dist1 = 0.000, Dist2 = 0.000
Select first line or [Undo/Polyline/Distance/Angle/Trim/mEthod/Multiple]: select D
Specify first chamfer distance <0.000>: type the distance for first side
Specify second chamfer distance <0.000>: type the distance for second side
2. Now chamfer the object.
Select first line or [Undo/Polyline/Distance/Angle/Trim/mEthod/Multiple]: select the (First side) to be chamfered (distance 1).
Select second line or shift-select to apply corner or [Distance/Angle/Method]: select the (Second side) to be chamfered (distance 2).
Note: When you place the cursor on the second side, AutoCAD displays the Chamfer and allows you to change the Distances before it is actually drawn. If you choose to change the Distance, select the Distance option, enter new distance values then select the 2nd side.
ANGLE METHOD
Angle method requires input for the length of the line and an angle.
1. Select the CHAMFER command
Command: _chamfer
(TRIM mode) Current chamfer Dist1 = 1.000, Dist2 = 1.000
Select first line or [Undo/Polyline/Distance/Angle/Trim/method/Multiple]: type A
Specify chamfer length on the first line <0.000>: type the chamfer length
Specify chamfer angle from the first line <0>: type the angle
2. Now Chamfer the object
Select first line or [Undo/Polyline/Distance/Angle/Trim/mEthod/Multiple]: select the (First Line) to be chamfered. (the length side)
Select second line or shift-select to apply corner: select the (second line) to be chamfered. (the Angle side)
OPTIONS:
Polyline: This option allows you to Chamfer all intersections of a Polyline in one operation. Such as all 4 corners of a rectangle.
Trim: This option controls whether the original lines are trimmed or remain after the corners are chamfered. (Set to Trim or No trim.)
mEthod: Allows you to switch between Distance and Angle method. The distance or angle must have been set previously.
Multiple: Repeats the Chamfer command until you press
COPY
The COPY command creates a duplicate set of the objects selected.
The COPY command is similar to the MOVE command.
The steps required are:
1. Select the objects to be copied.
2. Select a base point.
3. Select a New location for the New copy.
The difference between Copy and Move commands:
The Move command merely moves the objects to a new location.
The Copy command makes a copy and you select the location for the new copy.
1. Select the Copy command using one of the following commands:
2. The following will appear on the command line:
Command: _copy
Select objects: select the objects you want to copy
Select objects: stop selecting objects by selecting
Current settings: Copy mode = Multiple
Specify base point or [Displacement/mOde]
Specify second point of displacement or select the
new location (P2) for the first copy
Specify second point or [Exit / Undo]
next copy or press
Note:
If you select the option mOde, you may select Single or Multiple copy mode. The default setting is Multiple. It is practical to leave the mode setting at Multiple. If you choose to make only one copy just press
The copy command continues to make copies until you press
COPY Array
option
The Copy command allows you to make an Array of copies.
After you have selected the Base point the following prompt appears:
Specify second point or [Array]
If you select the option Array,
1. Enter the number of items to Array: type in 4
2. Place 2nd Point or [Fit]: Place 2nd point or select F
Note: The Array option within the Copy command is a quick method to create multiple copies. For more accurate array options use the Array command.
COPY using DRAG
The Drag option allows you to quickly move or copy an object(s).
EXAMPLE:
1. Draw a Circle.
2. Select the