Introduction to AutoCAD Chapter 15 Exercise 1

Transcription

1 Page 1 Introduction to AutoCAD 2010 Alf Yarwood Chapter 15 Exercise 1 1. Open AutoCAD 2010 with a double-click on its shortcut icon in the Windows desktop. 2. Open the template acadiso3d.dwt. 3. Open the Layer Properties Manager by entering layer at the command line. 4. In the Layer Properties Manager palette which appears left-click the Delete Layer icon, followed by left-clicks on each layer other than layer Left-click the New Layer icon three times to form Layer1, Layer2 and Layer3,. 6. For each layer left-click the colour square and from the Select Color dialog which appears select red for Layer1, magenta for Layer2 and blue for Layer3. Close the dialog. Set the Lineweight for the three layers to Set the drawing window to a Four: Equal viewports setup. 8. Make Layer1 the current layer. 9. Construct the body of the tool holder working in all four viewports as necessary. 10. Turn Layer1 off and make Layer2 current and working in all four viewports construct the pin with its screws. Note - in the Illustration on the next page an enlargement of one of the screws is shown in the Front viewport. 11. Turn Layer2 off and make Layer3 current and working in all four viewports construct the bolt for clamping the pin in position within the tool holder. 12. Turn all three layers - Layer1, Layer2 and Layer3 on. 13. Left-click in the Isometric viewport to make it current. In the View/Viewports panel s *Active Module Configuration* list click Single. 14. In the Home/View panel click Conceptual shading. 15. Add suitable lighting, followed by attaching suitable materials to the parts: Holder, Pin and screws, Screw. 16. Render the model drawing. 17. Save the model drawing to the file name 15_Exercise01.dwg in a floppy disk. 18. Close the drawing window.

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4 Page 4 Chapter 15 Exercise 2 1. Open acadiso3d.dwt - left-click New... in the Quick Access toolbar. 2. Construct the two sloping partitions first. (a) In a Front view, construct two closed polyline outlines from which solids of revolution can be produced. (b) Call the Revolve tool from the Home/3D Modeling panel and form the required solids of revolution. 3. Set the window in the ViewCube/Top view. 4. Construct the outlines for partitions and the surrounding 2 units thick walls and extrude the outlines to a height of 15. Using the two tools Union and Subtract to form the partitions. Use the Fillet tool to fillet the righthand corners of the partitions. 5. Construct the base from two polylines. Extrude the outer to a height of 15 and the inner to a height of 13. Place in the ViewCube/Front view and move the two into correct positions relative to each other. Subtract the inner from the outer. 6. Still in the Front view make sure the partitions are at a correct height relative to the base and with Union form a union of the base and partitions. 7. Place in the ViewCube/Isometric view and select 3D Hidden from the Home/View panel. 8. Place in the ViewCube/Top view and add suitable lighting and a suitable material. 9. Place in the ViewCube/Isometric view and render. 10. Save to a floppy disk with the file name 15_Exercise02.dwg. 11. Close the drawing window.

5 Page 5 Chapter 15 Exercise 3 1. Open acadiso3d.dwt - left-click New... in the Quick Access toolbar. 2. Construct an extrusion for the plate, cylinders for the central part and the holes and a torus for the flange at the outer edge of the large cylinder.

6 Page 6 3 Place the drawing window in the ViewCube/Front view and move the various solids to their correct positions relative to each other and Zoom to While in the ViewCube/Front view, construct cylinders and a torus for the spindle bearing part of the component and an extrusion for the support piece between the upper and lower parts. 5. Go back to the ViewCube/Top view, and move these parts to their correct positions relative to the other parts and copy the torus to the other end of the spindle bearing. 6. Place the drawing area in the ViewCube/Isometric view, Zoom to 1 and using the Union and Subtract tools form the 3D model.

7 Page 7 7. Place the drawing in the ViewCube/Top view, Zoom to 0.5 and add suitable lighting. In this example one Point light is 800 high above the model and two Distant lights one placed in front and 900 high and the other to the left front and 600 high. 8. Attach a material to the model and render. 9. Save the drawing to the file name 15_Exercise03.dwg in a floppy disk. 10. Close the drawing window. Additional exercises 1. A drawing on the right gives details of the polyline from which the rendered 3D solid model shown to its right was obtained. Construct the polyline and from the polyline construct the 3D solid model. Add suitable lighting and a material and render. 2. Construct and render a 3D solid model drawing of the support, working to the details given in the two-view orthographic projection.

8 Page 8 3. Construct and render the 3D solid model drawing of a support, working to the details given in the three-view third angle orthographic projection. 4. A rendering of a rotating arm from a machine is shown to the right and details of the arm in a two-view orthographic projection is given below. Construct a 3D solid model drawing of the arm to the given details, add lighting and a material and render the model.

9 Page 9 Multiple choice questions 1. Can Ambient lighting be set at a figure before rendering a 3D model: (a) Yes (b) No (c) Requires a setting in a dialog (d) Set to a figure of When setting lighting before rendering a 3D model Distant light can be described as: (a) A light the value of which diminishes in intensity the further the light position is set from the 3D model (b) Its light value is of the same intensity no matter how far the light position is set from the 3D model (c) Its intensity increases when set in front and above the 3D model compared with its being set to the side and above the model (d) A light which sheds rays in all directions from its set position 3. Which in your opinion gives the best rendering results: (a) Medium (b) High (c) Presentation (d) They are all as good as each other 4. Can a 3D model which has been Conceptual shaded when using the 3D Orbit tool be rendered after attaching materials: (a) Yes (b) No (c) After materials have been added to a 3D model it cannot be Conceptual shaded (d) The 3D Orbit tool cannot be used after rendering has taken place 5. When printing or plotting a 3D model, which of the following statements is correct: (a) A rendered 3D model in a single viewport can be plotted in full colour (b) A Conceptual shaded 3D model in a single viewport can be plotted in full colour (c) A four-view viewport screen of a rendered 3D model in Model Space can be plotted in full colour (d) A four-view viewport screen of a Conceptual shaded 3D model in Model Space can be plotted in full colour