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      <title>Create a Sparking Head With Trim Solid&rarr;Subtract</title>
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      <div class="title_topic4" id="xps10_pagetitle">Create a Sparking Head With Trim Solid&rarr;Subtract</div>
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      <p class="para_topic">In this step, you will <b class="uiTerm">Trim Solid </b> to quickly create a sparking head by letting the Subtract option subtract the sparking head from a solid box.
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      <div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">Open <b class="uiTerm">workpiece_2.prt</b>.
         </p>
      </div>
      <div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">On the <b class="uiTerm">Electrode Design </b><a class="links" href="javascript:void(0)" onclick="top.popUpPage('nxelectrode_design/index.html?goto=nxelectrode_design/nx_electrode_toolbar.html&amp;vars=-aux,-home','link','menubar=yes,status=no,resizable=yes,toolbar=no,scrollbars=yes,location=no,directories=no,height=600,width=500,left=100,top=100');return(false);">toolbar</a>, choose <b class="uiTerm">Trim Solid</b> <img align="bottom" src="../graphic_library/icons/toolbars/wizards/electrode_design/trim_solid.gif" border="0">.
         </p>
      </div>
      <div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">On the <b class="uiTerm">Trim Solid</b> dialog box, choose <b class="uiTerm">Subtract</b>.
         </p>
      </div>
      <p class="para_topic">The <b class="uiTerm">Trim Solid </b>dialog box presents a new set of parameters.
      </p>
      <div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">In the graphics window, select the cylindrical face on the box top as shown.
         </p>
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                  <p class="para_td"><b class="uiTerm">Selected Face</b></p>
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      </table><br><div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">Select face 2.
         </p>
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                  <p class="para_td"><b class="uiTerm">Select Face 2</b></p>
               </td>
            </tr>
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      </table><br><div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">Select face 3.
         </p>
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                  <p class="para_td"><b class="uiTerm">Select Face 3</b></p>
               </td>
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      </table><br><div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">On the <b class="uiTerm">Trim Solid</b> dialog box, click <b class="uiTerm">Apply</b>.
         </p>
      </div>
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                  <p align="center"><img align="bottom" src="graphics/case_5b_5.gif"></p>
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                  <p class="para_td"><b class="uiTerm">Trim Solid Subtract Result</b></p>
               </td>
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      </table><br><div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">On the <b class="uiTerm">Trim Solid</b> dialog box, choose <b class="uiTerm">Create Bounding Box</b>. 
         </p>
      </div>
      <div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">Change the option to  <b class="uiTerm">Existing Box</b>.
         </p>
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      <div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">In the graphics window, select the box.
         </p>
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                  <p class="para_td"><b class="uiTerm">Box Selection</b></p>
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      </table><br><div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">On the <b class="uiTerm">Trim Solid</b> dialog box, choose <b class="uiTerm">Edit Bounding Box</b>.
         </p>
      </div>
      <div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">In the graphics window, drag the top face of the box in the positive-Z direction.
         </p>
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                  <p align="center"><img align="bottom" src="graphics/case_5b_7.gif"></p>
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                  <p class="para_td"><b class="uiTerm">Edit Bounding Box</b></p>
               </td>
            </tr>
         </tbody>
      </table><br><div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">On the <b class="uiTerm">Create Box</b> dialog box, click <b class="uiTerm">OK</b>.
         </p>
      </div>
      <div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">On the <b class="uiTerm">Trim Solid</b> dialog box, click <b class="uiTerm">Cancel</b>.
         </p>
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                  <p align="center"><img align="bottom" src="graphics/case_5b_8.gif"></p>
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                  <p class="para_td"><b class="uiTerm">Trimmed Solid</b></p>
               </td>
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            <td valign="top" align="left"><img align="left" src="../graphics/note.gif" alt="Note" title="Note"></td>
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               <div class="para_note">
                  <p class="para_note_body">In the <b class="uiTerm">Trim Solid</b> tool, the<b class="uiTerm"> Subtract</b> option performs a <b class="uiTerm">Boolean</b> operation between the box and workpiece.  The <b class="uiTerm">Subtract </b>option does not include any extension operations. 
                  </p>
               </div>
            </td>
         </tr>
      </table>
      <table border="0" cellpadding="2" cellspacing="1" frame="void" rules="none" width="434" align="center">
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            <tr bgcolor="" valign="middle">
               <td align="center" colspan="1" rowspan="1">
                  <p align="center"><img align="bottom" src="graphics/case_5b_9.gif"></p>
               </td>
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               <td align="center" colspan="1" rowspan="1">
                  <p class="para_td"><b class="uiTerm">Final Sparking Head</b></p>
               </td>
            </tr>
         </tbody>
      </table><br><div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">Close the part file.
         </p>
      </div>
      <div class="action">
         <p class="para_action1"><img src="../graphics/actarrow.gif">To continue, click the <b class="uiTerm">Next </b> button.
         </p>
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