TAILIEUCHUNG - Modelling with AutoCAD 2011 Part 8

Tham khảo tài liệu 'modelling with autocad 2011 part 8', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | The swept solid primitives 203 9 Select the revolve icon from the solids toolbar and a objects select the polyline outline then right-click b axis of revolution X axis c angle of revolution 250 d the revolved effect will be as fig b . Observe then undo 10 At the command line enter REVOLVE R and a objects select polyline then right-click b axis of revolution enter Y R c angle of revolution 360 d the result will be as fig c - pan needed e observe then undo the revolved effect 11 Finally revolve the polyline a about the Y axis b with a 300 angle of revolution - fig d 10 Shade 3D orbit etc. then save if required This completes the swept primitive exercises. Plotting multiple viewport layouts with hide To obtain a plot of a multiple layout with hide the user needs the use the MVIEW command. To demonstrate this command 1 Open any multiple viewport drawing . the splined shaft example 2 Enter paper space 3 At the command line enter MVIEW R and prompt Specify corner of viewport or various options enter H R - the hideplot option prompt Hidden line removal for plotting ON OFF enter ON R prompt Select objects respond pick the borders of all viewports which have to have hidden line removal then right-click 4 The command line is returned 5 Proceed with the normal plot sequence but ensure that the Hide Plot option is NOT ACTIVE . no tick 6 This procedure should be used at all times when multi-viewport plots are required with hidden line removal 204 Modelling with AutoCAD 2002 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 Summary Swept solids are obtained with the extrude and revolve commands The two commands can be activated a by icon selection from the Solids toolbar b from the command line with Draw-Solids c by entering EXTRUDE and REVOLVE at the command line Very complex models can be obtained from simple shapes Only certain shapes can be extruded revolved. These are closed polylines circles ellipses polygons closed splines and regions more on this in a later chapter Objects can be .

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