While in the process of editing solids, you may end up with two separate solid forms that were created from one solid, as shown in Figure 18.42.Even though the two solids appear separated, they act like a single object. In these situations, Auto- CAD offers the Separate tool in the Solids Editing toolbar. To use it, just click the Separate tool, then select the solid that has become separated into two forms,
You’ve seen how each of the Solids Editing tools works through somesimple examples. You aren’t limited to using these tools in the way shown in this section and this book cannoi: anticipate every situation you may encounter as you create your solid models. These examples are intended as an introduction to these tools, 50 feel free to experiment with them. You can always use the Undo option to backtrack in case you don’t get the results you expect
This concludes your tour of the Solids Editing toolbar. Next, you’ll learn how to use your 3D solid models to quickly generate 2D working drawings.
Enhancing the 2D Drawing Process
Using solids to model a part-such as the Bracket and the Solidedit examples used in this chapter-may seem a bit exotic, but there are definite advantages to modeling in 3D, even if you want to draw the part in only 2D as a page in a set of manufacturing specs.
The exercises in this section show you how to quickly generate a typical mechanical drawing from your 3D model using Paper Space and the Solids toolbar. You will also examine techniques for dimensioning and including hidden lines.
Drawing a Standard Top, Front, and Right-Side View
One of the more common types of mechanical drawings is the orthogonal projection. This style of drawing shows the top, front, and right-side view of an object. Sometimes a 3D image is also added for clarity. You can derive such a drawing within a few minutes, once you have created your 3D solid model. The first step is to select a sheet title block. The title block consists of a border and .\0 area in the lower-right comer for notes and other drawing information.
Setting Up a File with a Title Block
The first step is to create a file using one of AutoCAD’s template ‘Sdesigned for mechanical applications.
1. If you haven’t done so already, save the Bracket. dwg file Inun the earlier exercise, and then Choose Filc> new.
2. In the Create New Drawing dialog box, click the Use a Template button
3. From the Select a Template list box, select An sid – co lor dependant plot styles. dwt, and then click OK. A title block appears, along with a viewportto Model Space.
4. Use File> Save As to save this file as Bracket.
You are now in Floating Model Space. Though it may not be obvious at first glance, the title block is in Paper Space and an active Model Space viewport is inside the title block.
Importing the 3D Model
The next step is to insert the Bracket solid model into this drawing. Remember that while you are in a floating Model Space viewport, anything you do affects Model Space. So in the next exercise, you will use the Insert tool to import the Bracket drawing into the Model Space of this new drawing. ‘
1. Choose Insert >- Block
2. In the Insert dialog box, click the File button.
3. At the Select Drawing File dialog box, locate and select the Bracket. dwg file and click Open.
4. Back in the Insert dialog box, make sure that the Explode check box in the lower-left comer of the dialog box is checked. Click the Specify On Screen heck box in the Insertion Point group to deselect this option.
5. Click OK. The drawing appears in the viewport.
There’s one more step to take before you actually set up the orthogonal views. You want to make the current viewport display a front view of the bracket, This is easily done with a single menu bar option.
1. Choose View >3D Views >Front. The Viewport view changes to show the front view of the model.
2 Choose View >Zoom >Scale, and then type lxp.J to give the view a 1-t0-1 scale. This has the same effect as setting the Standard Scale property of the viewport to a value of 1:1.The view is now in proper scale to the title block.
3. Choose View>Paper Space, and then using its grips, resize the viewport so it is just large enough to display the model,.To expose the viewport grip, clide the inner bord~r of the title block,.
4. Move the viewport to a location similar to the one