Creating Hidden-Line Views AutoCad Help

You aren’t quite finished yet. Typically, orthographic projections, such as the top, front, and right-side view, will show the hidden portions of the model with dashed lines. For example, theholes toward the right end of the bracket would be shown dashed in the front view. You could set up the viewports to do a hidden-line removal at plot time, but this would not create the effect you want. Fortunately, AutoCAD offers the Setup Profile tool to quickly generate a proper Orthographic Projection view of your solid model. Take the following steps to create your first hidden-line view.

1. First, go to Floating Model Space by double-clicking the lower-left viewport.
3. Choose Setup Profile from the Solids toolbar, or choose Draw> Solids> Setup> Profile.
4. Click both halves of the solid model, and then press .J.
5. At the Disp 1ay hi dden profi 1e 1i nes on separate 1ayer? <Y>: prompt, press .J.
6. At the Project profile lines onto a plane? <Y>: prompt,press.J.
7. At the De1ete tangenti a1 edges? <Y>: prompt, press .J. AutoCAD will work for a moment, and then the command prompt will appear with no apparent change to the drawing.

You don’t see the effects of the Setup Profile tool yet. You’ll need to make the solid model invisible to display the work that was done by the Setup Profile tool. You’ll also have to make a few layer changes to get the profile views just right.

1. Double-click an area outside the viewport or click the MODEL button on the status bar to return to Paper Space.
2. Zoom into the front view so it fills most ,of the display area.
3. Turn off Layer 0 (zero). If it is the current layer, you will get a message telling you that you are about to turn off the current layer. Go ahead and click OK. You’ve just turned off the layer of the solid model, leaving the profile created by the Setup Profile tool. Notice that you only see an image of the front view.
4. Open the Layer Properties Manager (click the Layers tool in the Object Properties toolbar or choose Format> Layer from the menu bar).
5. Select the layer whose name begins with the “PH” prefix.
6. Change its line type to Hidden. You may need to load the hidden-line type.
7. Once you’ve changed the line type, click OK to exit the Properties Manager dialog box. The front view now displays hidden lines properly with dashed lines.

creating a 20 Projection from your 3D Model

Another tool on the Solids tool bar creates 2D drawings of 3D solid models. The Setup’ Drawing tool does nearly the same thing as the Setup Profile tool, with some differences. First of ail, the Setup’O(awing tool only works with viewports that are created by the’ Setup View tool. It automatically turns off the layer on which the solid model resides. So once it has created a 2D view, you can see the results without having to adjust layer settings. Also, unlike tbe Setup Profile tool, Setup Drawing leaves the 2D drawing objects as
individual objects ready to beedited, instead of .turning them into blocks.

Finally, the Setup Drawing tool creates layers whose names offer a better description of their purpose. For example, if you use Setup Drawing to create a 20 drawing of the riqhtside view, you will get layers entitled Rightside-dim, Rightside, and Rightside-vis. These
layer names are derived from the View name from which the 2D drawing is derived. Setup Drawing adds the -dim, -hid, and -vis suffixes to the view name to create the layer name. These suffixes are abbreviations for dimension, hidden. and visible.

Adding Dimensions and Notes in Paper Space

Although I don’t recommend adding dimensions in Paper Space for architectural drawings, it may be a good idea for mechanical drawings like the one in this chapter. By maintaining the dimensions and notes separate from the actual model, you keep these elements from getting in the way of your work on the solid model. You also avoid the confusion of having to scale the text and dimension features properly to ensure that they will plot at the correct site.

As long as you set up your Paper Space work area to be equivalent to the final plot size, you can set dimension and text to the sizes you want at plot time. If you want text 1/4″ high, you set your text styles to be 1/4″ high.
To dimension, just make sure you are in Paper Space (View> Paper Space), and then use the dimension commands in the normal way. However, there is one thing you do have to be careful of: If your Paper Space viewports are set to a scale other \ than 1 to 1, you must set the Annotation Units option in the Dimension Style dialog box to a proper value. The following steps show you how.

1.Choose Dimension» Style
2. In the Dimension Style Manager dialog box, make sure you have selected the style you want to use, and click Modify.
3. In the Modify Dimension Style dialog box, click the Primary Units tab.
4. In the Scale factor input box under the Measurement Scale group, enter the value by which you want your Paper Space dimensions multiplied. For example, if your Paper Space views are scaled at one-half the actual size of your model, you enter 2 in this box to multiply your dimensions’ values by 2.
5. Click the Apply to Layout Dimensions Only check box. This ensures that your dimension is scaled only while you are adding dimensions in Paper Space. Dimensions added in Model Space are not affected.
6. Click qK to close the Modify Dimension Style dialog box, then OK again in the Dimension Style Manager dialog box .

You’ve had to complete a lot of steps to get the final drawing you have now, but, compared to having to draw these views by hand, you have undoubtedly saved a great deal of time. In addition, as you will see later in this chapter, what you have is more than just a 2D drafted image. With what you have created, further refinements are now quite easy.

Posted on November 9, 2015 in Mastering 3D Solids

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