<!DOCTYPE html
  PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">

<!--
Copyright (c) 2006 UGS Corp.

All Rights Reserved.

This software and related documentation are proprietary to UGS Corp.
-->
<html>
   <head>
      <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
      <title>Cavity Milling Cut Area</title>
      <script language="javaScript">
        abridged="false";
        displayConditions=new Array();
      </script>
      <link type="text/css" href="../css/main_styles.css" rel="stylesheet">
   </head>
   <body class="bodydocs" onload="top.pageLoader()" bgcolor="#FFFFFF">
      <div class="title_topic2" id="xps10_pagetitle">Cavity Milling Cut Area</div>
      <hr noshade="true">
      <p class="para_topic">Use Cut Area  <img align="bottom" src="graphics/geomtype_cutarea.gif" border="0"> to create localized cavity milling operations. Like in Zlevel and surface contouring, you can select specific faces on a part to contain the cutting regions instead of selecting the entire solid body. This helps eliminate the need for trim boundaries.
      </p>
      <p class="para_topic">A common use of cut area is in mold and die machining. Many mold cavities require a &quot;divide-and-conquer&quot; strategy where the cavity is divided into separate, manageable areas. You can then apply different strategies for specific areas, such as wide-open regions or deep, intricate areas. This is especially important for high speed hard-milling</p>
      <p class="para_topic">Cut Area also improves processing time when the cut area is limited to a small region within a large part.</p>
      <table border="0">
         <tr>
            <td valign="top" align="left"><img align="left" src="../graphics/note.gif" alt="Note" title="Note"></td>
            <td valign="bottom" align="left" width="100%">
               <div class="para_note">
                  <p class="para_note_body">For collision and gouge avoidance, select the entire part, including the faces you aren't cutting, as part geometry.</p>
               </div>
            </td>
         </tr>
      </table>
      <p class="para_topic">Cut Area is in the geometry selection for cavity milling operations, and can also be inherited from a geometry group. &nbsp;Select an individual face or multiple faces as the cut area. </p>
      <div class="title_division">Cavity Milling &ndash; Extend at Edges</div>
      <p class="para_division">You can use <b class="uiTerm">Extend at Edges</b> (Cut Parameters dialog box, Strategy page) to make the cutter run off the faces and go beyond the exterior edges of the cut area in open areas. <b class="uiTerm">Extend at Edges</b> tangentially extends the path for open pockets (up to the blank) and eliminates edge roll over. If the extension distance goes past the blank, the cutting is trimmed at the blank. Hint: To extend all the way to the blank, specify a large extension distance.
      </p>
      <table border="0">
         <tr>
            <td valign="top" align="left"><img align="left" src="../graphics/note.gif" alt="Note" title="Note"></td>
            <td valign="bottom" align="left" width="100%">
               <div class="para_note">
                  <p class="para_note_body">Cut area extension regions in upper levels may get enlarged to include the extension regions for lower levels. This ensures that the material above gets removed and the region below can be safely cut.</p>
               </div>
            </td>
         </tr>
      </table>
      <p class="para_division">When the blank top is above the cut area, the cut area is extended to the top of the blank. Machining is contained within this area.</p>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/cav_mil-blue_extend_open.gif"></p>
      </div>
      <div class="title_figure">Cut Area extended up to the top of the blank</div>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/cav_mil-green_extend_open.gif"></p>
      </div>
      <div class="title_figure">Cut Area extended out to the side of the blank</div>
      <p class="para_division">When there is an unselected cavity within the cut area, the resulting tool path avoids the sub-cavity, but does machine above it. The following pictures illustrate this:</p>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/cav_mil-orange_subpocket.gif"></p>
      </div>
      <div class="title_figure">Blue Cavity Not Completely within Orange Cut Area: Path Goes Around it</div>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/cav_mil-orange_sub_closed.gif"></p>
      </div>
      <div class="title_figure">Blue Cavity Completely within Orange Cut Area: Path Goes Over, but Not Inside Cavity</div>
      <p class="para_division">When the blank top is above the cut area, the cut area is extended to the top of the blank. Machining is contained within this area.</p>
      <div class="title_division">Defining the Removal Volume &nbsp;</div>
      <p class="para_division">For the best results in Cavity Milling, the cut area should contain faces that clearly define a volume of material to remove. If the cut area doesn't define a volume, the results may not be desirable. </p>
      <p class="para_division">If the cut area contains only vertical faces, the system still attempts to define a volume to remove, but it may not be what you expect. By selecting more faces, adjusting the extension distance, or changing the blank, you should be able to get the desired tool path for a local area.</p>
      <p class="para_division">If the cut area contains only horizontal faces, then no depth of the volume is defined, and the cut levels may be extended up to the top of the blank. To limit the cut depths to the local area, either select some non-horizontal faces to represent the depth, or adjust the cut levels manually.</p>
   </body>
</html>