Copyright Goodheart-Willcox Co., Inc. Chapter 12 Solid Model Editing 309 NOTE NOTE AutoCAD displays a variety of error messages when invalid solid editing operations are attempted. Rather than trying to interpret the wording of these messages, just realize that what you tried to do will not work. Actions that may cause errors include trying to rotate a face into other faces or extruding and tapering an object at too great of an angle. When an error occurs, try the operation again with different parameters or determine a different approach to solving the problem in order to maintain the design intent. Face Editing Face Editing The basic components of a solid are its faces. Many of the SOLIDEDIT options are for editing faces. All eight face editing options prompt you to select faces. It is impor- tant to make sure you select the correct part of the model for editing. Remember the following three steps when using any of the face editing options. 1. First, select a face to edit. If you pick an edge, AutoCAD selects the two faces that share the edge. If this happens, use the Remove option to deselect the unwanted face. A more intuitive approach is to select the open space of the face as if you were touching the side of a part. AutoCAD highlights only that face. 2. Adjust the selection set at the Select faces or [Undo/Remove/ALL]: prompt. The following options are available. • Undo. Removes the previous selected face(s) from the selection set. • Remove. Allows you to select faces to remove from the selection set. This is only available when Add is current. • All. Adds all faces on the model to the selection set. This is only available after selecting at least one face. It can also be used to remove all faces if Remove is current. • Add. Allows you to add faces to the selection set. This is only available when Remove is current. 3. Press [Enter] to continue with face editing. Extruding Faces An extruded face is moved, or stretched, in a selected direction. The extrusion can be straight or have a taper. To extrude a face, select the command and pick the Face Extrude option. Remember, the option is directly entered when picking the button in the ribbon. You are then prompted to select the face(s) to extrude. Nonplanar (curved) faces cannot be extruded. As you pick faces, the prompt verifi es the number of faces selected. For example, when an edge is selected, the prompt reads 2 faces found. When done selecting faces, press [Enter] to continue. Next, the height of the extrusion needs to be specifi ed. A positive value adds mate- rial to the solid, while a negative value subtracts material from the solid. A taper can also be given. Specify height of extrusion or [Path]: (enter the height) Specify angle of taper for extrusion 0: (enter an angle or accept the default) Solid validation started. Solid validation completed. Enter a face editing option [Extrude/Move/Rotate/Offset/Taper/Delete/Copy/coLor/mAterial/Undo/eXit] eXit: X↵ Solids editing automatic checking: SOLIDCHECK=1 Enter a solids editing option [Face/Edge/Body/Undo/eXit] eXit: X↵ SOLIDEDIT Ribbon Home Solid Editing Solid Solid Editing Extrude Faces Type SOLIDEDIT