Copyright Goodheart-Willcox Co., Inc. Chapter 11 Subobject Editing 299 Other Solid Editing Tools Other Solid Editing Tools There are other tools that can be used in solid model editing. As you will learn in Chapter 12, the SOLIDEDIT command can be used to edit faces, edges, and vertices, much like subobject editing. In addition, you can extrude open or closed geometry with the PRESSPULL command, offset edges with the OFFSETEDGE command, and explode a solid with the EXPLODE command. These methods are discussed in the next sections. Presspull The PRESSPULL command allows you to create extrusions from open or closed 2D profi les, 3D curves, and 3D solid faces. You can extrude open 2D objects such as lines, polylines, splines, or arcs. You can also extrude objects forming closed areas such as circles, closed polylines, and regions. In addition, you can use the PRESSPULL command to add to or subtract from an existing solid by selecting and dragging a closed and bounded area of the solid. The extrusion is always applied perpendicular to the plane of the boundary, but can be in the positive or negative direction. When applied to the face of a solid, the PRESSPULL command is very similar to the Extrude Faces option of the SOLIDEDIT command, though dynamic feedback is provided for the extrusion with PRESSPULL. Once the command is initiated, you are prompted to select an object or bounded area to extrude. If you are selecting a closed boundary, pick inside the boundary. Then, drag the boundary to a new location and pick, or, if dynamic input is on, enter the extrusion distance. The PRESSPULL command stays active so repetitive selections can occur in a single command sequence. An example of using the PRESSPULL command to add material to or subtract material from a 3D model is shown in Figure 11-36. By extruding the cylinder in a positive direction, the new cylinder is automatically unioned to the existing part, Figure 11-36B. By extruding the cylinder in a negative direction, the cylinder is subtracted from the wedge, Figure 11-36C. Using the PRESSPULL command to create extrusions from open 2D objects is shown in Figure 11-37. As is the case when using the EXTRUDE command, the resulting object is a surface. When extruding a 3D face with the PRESSPULL command, the extrusion is applied perpendicular to the surface and the shape of adjacent faces is maintained. If the adjacent faces are at an angle to the selected surface, you can maintain the shape of the faces by pressing the [Ctrl] key. You can use this method to maintain the orientation of adjoining surfaces or to create a taper angle. Figure 11-38A shows a run of ductwork along the top of walls that are at an angle to each other. The ducts follow the wall angles. A redesign requires the angled ductwork to be expanded. In Figure 11-38B, the long duct along the angled wall has been expanded using the PRESSPULL command. Then, the adjacent face is selected with the [Ctrl] key to maintain the angle with the face of the long duct. In addition, the face of the next duct at the 90° wall corner is selected and extruded. The result is shown in Figure 11-38C. In Figure 11-38D, the four front wall ducts have been expanded and unioned to complete the design. NOTE NOTE The PRESSPULL command allows for multiple object selection. To select more than one object, use the Multiple option, hold down the [Shift] key, or right-click and select Multiple from the context-sensitive shortcut menu. PRESSPULL Ribbon Home Modeling Solid Solid Presspull Type PRESSPULL