<!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>Part Stock</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_topic3" id="xps10_pagetitle">Part Stock</div>
      <hr noshade="true">
      <p class="para_topic">The cut parameter <b class="uiTerm">Part Stock</b> is common to Planar Milling, Face Milling, and Surface Contouring.
      </p>
      <p class="para_topic"><b class="uiTerm">Part Stock</b> specifies an envelope of material surrounding the part geometry to remain after machining. Part stock is usually applied for a roughing operation.
      </p>
      <div class="title_division">Surface Contouring</div>
      <p class="para_division">The stock specified here only applies to part entities which do not have custom stock specified (under <b class="uiTerm">Custom Data</b> in the <b class="uiTerm">Part Geometry</b> dialog box).
      </p>
      <p class="para_division">To specify a negative <b class="uiTerm">Part Stock</b> value, the smallest radius of any arc in the tool profile must be greater than the absolute value of the negative stock. If any corner in the tool profile is formed by the intersection of two lines, this is regarded as a zero radius and a negative stock is not allowed..
      </p>
      <div class="title_division">Planar Milling</div>
      <p class="para_division">Part stock is generally removed in a subsequent finishing operation, but can also be removed in the finish pass of the same operation (<b class="uiTerm">Follow Periphery</b> or <b class="uiTerm">ZigZag</b> patterns.)
      </p>
      <p class="para_division">Applying part stock to boundaries or faces can make some of the material to remove impossible to reach without gouging. The following figure shows how a region cannot be entered by a tool because of the part stock.</p>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/pcmill_figurespl5.gif"></p>
      </div>
      <div class="title_figure">&nbsp;Cut regions due to part stock</div>
      <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">If you define the boundary to be machined with <b class="uiTerm">Tool Position</b> set to On, the software ignores part stock and machines on the boundary. To specify a negative <b class="uiTerm">Part Stock</b> value, you must use a tool with:
                  </p>
                  <ul>
                     <li>
                        <p class="para_note_body">corner radii (R1 and/or R2) greater than or equal to the amount of the negative stock</p>
                     </li>
                     <li>
                        <p class="para_note_body">a tip</p>
                     </li>
                  </ul>
               </div>
            </td>
         </tr>
      </table>
      <p class="para_division">If you are using automatic engage methods and you set your <b class="uiTerm">Part Stock</b> values too large, you can in a sense &quot;close up&quot; a pocket and the software will have to ramp the tool into the part.
      </p>
   </body>
</html>