Now let’s explore the tools that let you quickly duplicate objects. In the next exercise, you will begin to draw parts to a small kitchen. The first exercise introduces the Array command, which enables you to draw the gas burners of a range top.
Making Circular Copies
To start the range top, you have to first set the layer on which you want to draw, and then draw a’circle representing the edge of one burner.
1. Set the current layer to Fixture, and turn the Grid Snap mode on by rightclicking the SNAP button in the status bar, then selecting Grid Snap On.
2. Click the Circle tool on the Draw toolbar, or type C.J.
3. At the Spec; fy Center poi nt for ci rcl e or [3p/2p/Ttr (Tan tan
tan rad; us)] : prompt, pick a point at coordinate 4′,4′. Metric users should pick a point at coordinate 120,120.
4. At the Spec; fy radi us of ci rcl e or [D; ameter] : prompt, enter 3.J. Metric users should enter 7.6.J. The circle appears.
Now you’re ready to use the Array command to draw the burner gril~.You will first draw one line representing part of the grill, and then use the Arfay corrimands to create the copies.
1. Turn off both the Polar Snap and Grid Snap modes by clicking the SNAP button in the status bar and draw a 4″-long line starting from the coordinate 4′-1″, 4′-0″ and ending to the right of that point. Metric users should draw a line 9cm long starting at coordinate 122,120and ending to the right oi that point.
2. Zoom into the circle and line to get a better view. Your drawing should look
3. Click Array on the Modify toolbar, or type AR.J.
4, At the Se1ect obj ects: prompt, enter L.J. This highlights the line you just
5. Press .J to confirm your selection.
6. Atthe Enter type of array [Rectangular/Polar] <R>: prompt, type p.J to use the Polar array option, You can also right-dick and select Polar from the popup menu,
7. At the Specify Center poi nt of array: prompt, pick the center of the circle. To do this, Shift+right-click, then select Center from the popup menu..
8, At the Enter the number of items in the array: prompt, enter 8.J. This tells AutoCAD you want seven copies plus the original.
At the Specify the angle to fill (+-ccw,–cw) <360>: prompt, press .J.J to accept the default. The default value ofJ60 tells AutoCAD to copy the objects so that they are spaced evenly over a 360° arc. (If you had instead entered 180°, the lines would be evenly spaced over a 180° arc, filling only half the circle.)
10 At the Rotate obj ect 5 ? <Y>: prompt, press .J again to accept the default. The line copies around the center of the circle, rotating as it copies, Your drawing will look like Figure 5,2,
Making Rowand Column Copies
Now you will draw the other three burners of the gas range by creating a rectangular array from the burner you just drew. You will first zoom back a bit to get a view of a larger area. Then you will proceed with the Array command.
1. Choose View > Zoom> Scale, or type Z↵ S↵.
2. Enter .Sx.J, Your drawing will look like
Entering .5x for the Zoom Scale value tells AutoCAD you want a view that reduces the width of the current view to fill half the display area, allowing you to see more of the work area. If you specify a scale value greater than 1 (5, for example), you will magnify your current view. If you leave off the-x, your new view will be in relation to the drawing limits rather than the current view.
Now you will finish the range top. Here you will get a chance to use the Rectangular Array option to create three additional burners.
3. Click the Array tool on the Modify toolbar again, or type AR↵
4. At the Se1ect obj ects: prompt, use a window to select the entire burner. Then press .J to confirm your selection.
5. Enter R.J at the Enter the type of array [Rectangular/Polar] <R>: prompt to select the Rectangular option.
6. As mentioned earlier, d rectangular array is a matrix of columns and rows. At the Ente r number of rows (–) <1>: prompt, enter 2.J. This tells AutoCAD the number of copies you want vertically.
7 At the Enter number of columns ( III ) <1>: prompt, enter 2.J “gain.
This tells AutoCAD the number of copies you w.mt horizontally.
8. At the Enter distance between rows or specify unit cell(-:-): prompt, enter 14.J. Metric users should enter 35.5.J. This tellsAutoCAD that thevertical distance between the rows ofbumers is 14″,35.5cmfor metric users.
9. At the Speci fy the di stance between columns (III): prompt, enter 16.J to tell AutoCAD you want the horizontal distance between the columns of burners to be 16”. Metric users should enter 40.6.J. Your screen will look like Figure 5.4.
You can also use the cursor to graphically indicate an array cel. An array cell is a rectangle defining the distance between rows and columns. You may want to use this option when an object is available to use as a reference from which to determine column and row distances. For example, you may have drawn a crosshatch pattern, as on a calendar, within which you want to array an object. You use the intersections of the hatch lines as references to define the array cell, which is one square in the hatch pattern.