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<a name="Dimension"></a>
<a name="14_7"></a><h2>Dimensions</h2>
<p>
<i>This chapter is about constructing dimensions. Figure 40
shows the notation that is used when referring to dimension parts.</i></p>
<p class="figure">
<img border="0" src="img/dim01.png"></p><p class="figure_label">
<b>Figure 40: </b>Notation for
dimensions.</p>
<p>
<b>Options Toolbar:</b>
</p>
<p>
The dimensioning tools may show individual option toolbars, but also
share one common toolbar. It allows you to enter a text label for the
dimension:</p>
<p>
<img border="0" src="img/options_dimension.png"><br>
</p>
<p>
This text label can be any text. When left empty, the label is
generated automatically and contains the measured distance of the dimension.
To add additional signs or letters to a measured dimension, you can use the
combination
<code><></code>
to insert the automatically generated label anywhere in the text you
entered.</p>
<p>
Examples:</p>
<p>
<table>
<tr>
<td>
<p>
<b>Chosen label in the toolbar:</b>
</p>
</td>
<td>
<p>
<b>Example for the generated label:</b>
</p>
</td>
</tr>
<tr>
<td>
<p>
<code>a</code>
</p>
</td>
<td>
<p>
<code>a</code>
</p>
</td>
</tr>
<tr>
<td>
<p>
<code><></code>
</p>
</td>
<td>
<p>
<code>20</code>
</p>
</td>
</tr>
<tr>
<td>
<p>
<code><> H7</code>
</p>
</td>
<td>
<p>
<code>20 H7</code>
</p>
</td>
</tr>
<tr>
<td>
<p>
<code>ø<></code>
</p>
</td>
<td>
<p>
<code>ø20</code>
</p>
</td>
</tr>
</table>
</p>
<a name="Aligned Dimension"></a>
<a name="Dimension - Aligned"></a>
<a name="14_7_1"></a><h3>Aligned Dimension</h3>
<p>
<b>CAD Toolbar:</b>
</p>
<p>
<img border="0" src="imgs/toolbar_dim_aligned.png"><br>
</p>
<p>
<b>Menu:</b>
</p>
<p class="code">
Dimension - Aligned</p>
<p>
<b>Hotkey:</b>
</p>
<p class="code">
da</p>
<p>
<b>Command:</b>
</p>
<p class="code">
?</p>
<p>
<b>Description:</b>
</p>
<p>
Creates aligned dimensions. Aligned dimensions usually measure the
length of an existing line (Figure 41). The dimension line is
always parallel to the line between the two extension line endpoints.</p>
<p class="figure">
<img border="0" src="imgs/dimaligned01.png"></p><p class="figure_label">
<b>Figure 41: </b>Sample for an
aligned dimension.</p>
<p>
<b>Procedure:</b>
</p>
<p>
<ol>
<li>Set the first extention line endpoint with the mouse or enter a
co-ordinate in the command line.</li>
<li>Set the second extension line endpoint.</li>
<li>Set the position of the dimension line.</li>
</ol>
</p>
<a name="Linear Dimension"></a>
<a name="Dimension - Linear"></a>
<a name="14_7_2"></a><h3>Linear Dimensions</h3>
<p>
<b>CAD Toolbar:</b>
</p>
<p>
<img border="0" src="imgs/toolbar_dim_linear.png"><br>
</p>
<p>
<b>Menu:</b>
</p>
<p class="code">
Dimension - Linear</p>
<p>
<b>Hotkey:</b>
</p>
<p class="code">
dr</p>
<p>
<b>Command:</b>
</p>
<p class="code">
?</p>
<p>
<b>Options Toolbar:</b>
</p>
<p>
<img border="0" src="img/options_dim_linear.png"><br>
</p>
<p>
<b>Description:</b>
</p>
<p>
Creates linear dimensions. Linear dimensions are usually used to
measure vertical or horizontal distances but can also measure distances with
any other angle. Figure 42 shows a horizontal version of a
linear dimension.</p>
<p class="figure">
<img border="0" src="imgs/dimlinear01.png"></p><p class="figure_label">
<b>Figure 42: </b>Example of a
horizontal, linear dimension.</p>
<p>
<b>Procedure:</b>
</p>
<p>
<ol>
<li>Enter the angle of the dimension in the options toolbar or click the
vertical or horizontal button to set the angle to 0 or 90.</li>
<li>Set the first extention line endpoint with the mouse or enter a
co-ordinate in the command line.</li>
<li>Set the second extension line endpoint.</li>
<li>Set the position of the dimension line.</li>
</ol>
</p>
<a name="Horizontal Dimension"></a>
<a name="Vertical Dimension"></a>
<a name="Dimension - Horizontal"></a>
<a name="Dimension - Vertical"></a>
<a name="14_7_3"></a><h3>Horizontal / Vertical Dimensions</h3>
<p>
<b>CAD Toolbar:</b>
</p>
<p>
<img border="0" src="imgs/toolbar_dim_hor_ver.png"><br>
</p>
<p>
<b>Menu:</b>
</p>
<p class="code">
Dimension - Horizontal</p>
<p class="code">
Dimension - Vertical</p>
<p>
<b>Hotkey:</b>
</p>
<p class="code">
dh, dv</p>
<p>
<b>Command:</b>
</p>
<p class="code">
?</p>
<p>
<b>Description:</b>
</p>
<p>
This tool behaves essentially like the one described above (Linear
Dimension). The only difference is that you cannot enter an angle.</p>
<a name="Radial Dimension"></a>
<a name="Dimension - Radial"></a>
<a name="14_7_4"></a><h3>Radial Dimensions</h3>
<p>
<b>CAD Toolbar:</b>
</p>
<p>
<img border="0" src="imgs/toolbar_dim_radial.png"><br>
</p>
<p>
<b>Menu:</b>
</p>
<p class="code">
Dimension - Radial</p>
<p>
<b>Command:</b>
</p>
<p class="code">
?</p>
<p>
<b>Description:</b>
</p>
<p>
Creates radial dimensions for circle or arc entities (Figure
43).</p>
<p class="figure">
<img border="0" src="imgs/dimradial01.png"></p><p class="figure_label">
<b>Figure 43: </b>Example of a
radial dimension.</p>
<p>
<b>Procedure:</b>
</p>
<p>
<ol>
<li>Choose a circle or arc entity.</li>
<li>Set the position of the radial dimension line using the mouse or by
entering a co-ordinate or an angle in the command line.</li>
</ol>
</p>
<a name="Diametric Dimension"></a>
<a name="Dimension - Diametric"></a>
<a name="14_7_5"></a><h3>Diametric Dimensions</h3>
<p>
<b>CAD Toolbar:</b>
</p>
<p>
<img border="0" src="imgs/toolbar_dim_diametric.png"><br>
</p>
<p>
<b>Menu:</b>
</p>
<p class="code">
Dimension - Diametric</p>
<p>
<b>Command:</b>
</p>
<p class="code">
?</p>
<p>
<b>Description:</b>
</p>
<p>
Creates diametric dimensions for circle or arc entities (Figure
44).</p>
<p class="figure">
<img border="0" src="imgs/dimdiametric01.png"></p><p class="figure_label">
<b>Figure 44: </b>Example of
a diametric dimension.</p>
<p>
<b>Procedure:</b>
</p>
<p>
<ol>
<li>Choose a circle or arc entity.</li>
<li>Set the position of the diametric dimension line using the mouse or
by entering a co-ordinate or an angle in the command line.</li>
</ol>
</p>
<a name="Angular Dimension"></a>
<a name="Dimension - Angular"></a>
<a name="14_7_6"></a><h3>Angular Dimensions</h3>
<p>
<b>CAD Toolbar:</b>
</p>
<p>
<img border="0" src="imgs/toolbar_dim_angular.png"><br>
</p>
<p>
<b>Menu:</b>
</p>
<p class="code">
Dimension - Angular</p>
<p>
<b>Command:</b>
</p>
<p class="code">
?</p>
<p>
<b>Description:</b>
</p>
<p>
Creates angular dimensions between two reference lines.
(Figure 45).</p>
<p class="figure">
<img border="0" src="imgs/dimangular01.png"></p><p class="figure_label">
<b>Figure 45: </b>Example of
an angular dimension.</p>
<p>
<b>Procedure:</b>
</p>
<p>
<ol>
<li>Choose the first line entity.</li>
<li>Choose the second line entity.</li>
<li>Set the position of the angular dimension line using the mouse or
by entering a co-ordinate in the command line.</li>
</ol>
</p>
<a name="Leader"></a>
<a name="Dimension - Leader"></a>
<a name="Arrow"></a>
<a name="Pointer"></a>
<a name="14_7_7"></a><h3>Leader</h3>
<p>
<b>CAD Toolbar:</b>
</p>
<p>
<img border="0" src="imgs/toolbar_dim_leader.png"><br>
</p>
<p>
<b>Menu:</b>
</p>
<p class="code">
Dimension - Leader</p>
<p>
<b>Hotkey:</b>
</p>
<p class="code">
dl</p>
<p>
<b>Command:</b>
</p>
<p class="code">
?</p>
<p>
<b>Description:</b>
</p>
<p>
Leaders are arrows that usually point from a
text entity to an other entity (Figure 46). In the figure
the text entity "N7" is connected to a surface with a leader.</p>
<p class="figure">
<img border="0" src="imgs/dimleader01.png"></p><p class="figure_label">
<b>Figure 46: </b>Example of
a leader.</p>
<p>
<b>Procedure:</b>
</p>
<p>
<ol>
<li>Set the location where the leader points to or enter a co-ordinate
in the command line.</li>
<li>Set the location of the next edge of the leader line.</li>
<li>Set the other edges of the leader line and press Return to
finish.</li>
</ol>
</p>
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