Introduction to AutoCAD 2012

Transcription

1 Introduction to AutoCAD 2012 Alf Yarwood Chapter 13 Exercise 1 1. Open AutoCAD 2012 with a double-click on its shortcut icon in the Windows desktop. 2. Open the template acadiso3d.dwt. 3. Make two new layer one of colour Yellow, the second of colour Cyan. Make layer Yellow current. 4. Left-click Named in View/Viewports panel. Page 1 5. The Viewports dialog appears. In the Standard viewports list pick Three: Right. Make sure that in the Setup popup list 3D is selected. 6. Left-click the OK button of the dialog. The dialog disappears from screen and the AutoCAD window shows a Three: Right viewports setup. 7. Left-click in the Top (bottom left) viewport to make it active.

2 Page 2 8. Left-click the Cylinder tool icon in the Home panel. The command line shows: Command: _cylinder Current wire frame density: ISOLINES=4 Specify center point for base of cylinder or [Elliptical] <0,0,0>: pick a central point Specify radius for base of cylinder or [Diameter]: enter 60 rightclick Specify height of cylinder or [Center of other end]: enter 150 rightclick Command: 9. Left-click the Sphere tool icon in the Home panel. The command line shows: Command: _sphere Current wire frame density: ISOLINES=4 Specify center of sphere <0,0,0>: pick centre of cylinder Specify radius of sphere or [Diameter]: enter 60 right-click Command: 10. Left-click in the Front (top left) viewport to make it active. 11. With the Move tool, move the sphere vertically into its correct position relative to the cylinder. 12. With the Union tool from the Home/Solid Editing panel form a union of the two solids. 13. Call the Box tool with a left-click on its tool icon in the Home panel. Material accompanying Introduction to AutoCAD 2012, ISBN Copyright 2011, Alf Yarwood.

3 Page In the Plan view construct a box as follows: Command: _box Specify corner of box or [CEnter] <0,0,0>: pick Specify corner or [Cube/Length]: pick Specify height: enter 15 right-click Command: 15. In the Front viewport, with the Move tool, move the box vertically to a good position. 16. Call Subtract with a left-click on its tool icon in the Home/Solid Editing panel and subtract the mouth from the head. 17. Make the Cyan layer current. In the Top viewport, construct two spheres of radius 5 for the eyes and with Move, move them into position in the head. 18. Make the Isometric viewport current, call the Fillet tool and fillet the base of the cylinder of the head to a radius of Add another cylinder for the neck and join with Union join it to he head. 20. Using the Wedge tool from the Home panel construct a wedge for the nose in the Top viewport, fillet its edges, then rotate and move to a good position. Then join to the head using Union. 21. In the isometric viewport select Conceptual from Visual Styles. 22. Save the model drawing to a memory stick with the file name 13_Exercise01.dwg. 23. Close the drawing window.

4 Page 4 Chapter 13 Exercise 2 1. Open AutoCAD 2012 with a double-click on its shortcut icon in the Windows desktop. 2. Open the template acadiso3d.dwt. Make a new layer colour Blue and make the layer current. 3. Select New from the View/Viewports panel and from the Viewports dialog select Four: Equal with Setup set to 3D. 4. Set ISOLINES to In the Front (top right) viewport, with the Sphere tool from the Home panel, construct a sphere of radius Construct boxes using the Box tool from the Home panel on each side of the sphere in the Right (top left) viewport, with one side 35 units from the centre of the sphere and subtract the boxes from the sphere using the Subtract tool from the Home/Solid Editing panel. 7. In the Plan (bottom right) viewport, construct three cylinders to sizes as given in Fig In suitable viewports and with the Move tool, move the cylinders to their correct places relative to each other and to the main model. 8. Form a union of the diameter 50 and 40 cylinders and subtract the smallest of the three cylinders from the union. 9. Call the Array tool from the Home/Modify panel and polar array the cylinder four times around the centre of the truncated sphere. 10. With the Union tool from the Home/Solid Editing panel form a union of the five objects. 11. In the Right viewport, construct a sphere of radius 25 and subtract it from the union. 12. In other viewports with the Move tool, move the sphere to its correct position in relation to the union. 13. Subtract the sphere from the union. 14. Save the model drawing to a memory stick with the file name 13_Exercise02.dwg. 15. Close the drawing window.

5 Page 5 Material accompanying Introduction to AutoCAD 2011, ISBN Copyright 2010, Alf Yarwood. Published by Elsevier Ltd. All rights reserved

6 Page 6 Chapter 13 Exercise 3 1. Open AutoCAD 2012 with a double-click on its shortcut icon in the Windows desktop. 2. Open the template acadiso3d.dwt. 3. Make a new layer Outlines of colour magenta and make it the current layer. 4. Place the AutoCAD window in Four: Left viewports, with a setup of 3D. 5. In the Top (centre left) viewport, construct the circle. 6. In the Front (top left) viewport, construct the ellipse. 7. Move the ellipse into its correct position with one axis end central to the circle. 8. Set ISOLINES to Make layer 0 current and the Isometric viewport current. 10. Call the Extrude tool from the Home panel. The command line shows: Command: _extrude Current wire frame density: ISOLINES=8 Select objects: pick the circle 1 found Select objects: right-click Specify height of extrusion or [Path]: enter p right-click Select extrusion path or [Taper angle]: pick the ellipse Command: 11. Working between the viewports and using the Copy tool, copy the link and rotate the link through Again working between the viewports and using Zoom where necessary, move the copied, rotated link in line with the first link. 13. With Copy tool copy the two links to make six in all. 14. In the Isometric viewport select Conceptual from Visual Styles. 15. Save your model drawing to the file name 13_Exercise03.dwg in a memory stick. 16. Close the drawing window.

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8 Page 8 Chapter 13 Exercise 4 1. Open AutoCAD 2012 with a double-click on its shortcut icon in the Windows desktop. 2. Open the template acadiso3d.dwt. Make a new layer Outlines of colour magenta. 3. Place the AutoCAD window in a Four: Equal viewport setup. 4. On the layer Outlines and in the Front (top right) viewport, construct a front view closed polyline outline of the body of the lever and extrude to a height of In the Front viewport, make the layer Construction current. Construct a polyline outline for the slot in the lever and extrude to a height of 20. In the Top (bottom right) viewport move the slot to position in the lever. 6. Make layer 0 current and subtract the slot from the lever. 7. Make the layer Dimensions and the Front viewport current and construct three cylinders - two of radii 40 and height 10 and one of radius 30 and height Make the Top viewport current and move the cylinders into their correct positions in relation to each other. Then with the Union tool create a single entity from the three cylinders. 9. Make the Isometric viewport current, call the Fillet tool and fillet the edges to a radius of In the Top viewport construct a cylinder of radius 10 and height 95. In another viewport move the cylinder to its correct position and with Union join it to the union of three cylinders. 11. At the command line: Command: enter change right-click Select objects: pick the lever 1 found Select objects: right-click Specify change point or [Properties]: enter p right-click Enter property to change [Color/Elev/LAyer/LType/ltScale/LWeight/Thickness]: enter c right-click New color [Truecolor/COlorbook] <BYLAYER>: enter blue right-click Enter property to change [Color/Elev/LAyer/LType/ltScale/LWeight/Thickness]: rightclick Command:

9 Page In the isometric viewport select Shaded with edges from the Visual Styles. 13. Save to a memory stick with the file name 13_Exercise04.dwg. 14. Close the drawing window.

10 Page 10 Chapter 13 Exercise 5 1. Open AutoCAD 2012 with a double-click on its shortcut icon in the Windows desktop. 2. Open the template acadiso3d.dwt. 3. Place the AutoCAD window in a Three: Left viewport setup. 4. In the Front (top right) viewport, construct a front view of the faceplate. 5. Extrude all parts to a height of Subtract the inner parts from the circular extrusion. 7. In the Front viewport construct the boss at the rear of the faceplate, extrude to a height of 23 and subtract the inner part from the outer extrusions. 8. In the Top (bottom right) viewport move the boss to its correct position relative to the faceplate. 9. Form a union of the two parts. 10. Change the colour of the model to Cyan. 11. Shade each viewport in the Conceptual Visual Style. 12. Save the model drawing to a file name 13_Exercise05.dwg in a memory stick. 13. Close the drawing window. Material accompanying Introduction to AutoCAD 2012, ISBN Copyright 2011, Alf Yarwood.

11 Page 11 Additional exercises 1. The illustration shows a Conceptual shaded 3D model of a food whisk which has been constructed on layers of different colours. In a Three: Right viewport setup and working to dimensions of your own choice construct a 3D model of a similar food whisk. The curved metallic parts of the whisk are constructed from a union of extrusions along a path. 2. The illustration on the next page shows a Conceptual shaded scene of five 3D models in a scene which includes four copies of a chair placed around a table. The models have been constructed on layers of different colours. Construct a 3D model drawing of a table such as that shown. Construct a 3D model of a chair similar to those shown and copy the chair three times and place the copies around the table. Finally shade the drawing in a SE Isometric viewport.

12 Page A Shaded 3D model of a toy is shown to the right and a three-view projection of the toy is shown on the next page. In a Three: Left viewport setting, construct a 3D model of the toy, including coloured 3D model drawings of the shaped lengths of material for placing in the shaped holes of the stand. Published by Elsevier Ltd. All rights reserved

13 Page Working to the dimensions given in the drawing below, construct the views of the Piston crank in a Four: Equal viewports setup. Shade each viewport when completed.

14 Page 14 Multiple choice questions 1. When constructing 3D model drawings in multiple viewports: (a) The set variable UCSFOLLOW must be set to on (b) The set variable UCSFOLLOW must be set to off (c) It does not matter whether the set variable UCSFOLLOW is set on or off (d) The set variable UCSFOLLOW must be set to When constructing 3D model drawings in multiple viewports (a) The UCS icons must not be showing in each viewport (b) It does not matter whether the UCS icons are showing in viewports or not (c) The UCS icon must be showing in the isometric view viewport (d) The UCS icon must be showing in the Front and Plan viewports. 3. When constructing 3D model drawings in multiple viewports: (a) Each viewport must be set independently to different viewpoints from the Visual Styles menu (b) Only when working in a particular viewport will its viewpoint need to be set (c) Each viewport is set to different viewpoints when a multiple viewport is chosen from the Viewports dialog (d) Each viewport is set to different viewpoints when a multiple viewport is chosen from the Viewports dialog only if the Setup popup list is set to 3D.