AutoCAD 2002 Bible

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On the CD-R


Step-by-Step: Drawing Polylines


1.    Open ab16-a.dwg from your CD-ROM.


2.    Save the file as ab16-1.dwg in your AutoCAD Bible folder. It shows a small section of a drive block, as shown in Figure 16-2. You need to complete part of the drawing. ORTHO and OSNAP should be on. Set running object snaps to endpoint, midpoint, and intersection. Layer 3 should be current.


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Figure 16-2: A small section of a drive block


Thanks to Mary Redfern of the Bethlehem Corporation, Easton, Pennsylvania, for this drawing.


Choose Polyline from the Draw toolbar. Follow the prompts:


From point: Choose the From object snap from the ObjectSnap flyout of the Standard toolbar.


Base point: Choose О in Figure 16-2.


<Offset>: @-1/2,0 J


Specify next point or[Arc/Close/Halfwidth/Length/Undo/Width]: Move the cursor in the 90-degree direction and type 3/32 J.


4. Type a J to continue with an arc. (Because your hands are already on the keyboard from typing the line length, it’s easier to type the option letter than to right-click and choose it from the shortcut menu.) At the Specify endpoint of arc or[Angle/CEnter/CLose/Direction/ Halfwidth/ Line/Radius/Second pt/Undo/Width]: prompt, type @3/16,3/16J.


5.    Type l Jto continue with a linear polyline segment. At the Specify next point or [Arc/Close/Halfwidth/Length/Undo/Width]: prompt, move the cursor in the 0-degree direction and type 11/32 J.


6.    Type a J to continue with an arc. At the prompt, type @3/16,3/16 J.

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