<!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>Cutter Clearance Angles</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">Cutter Clearance Angles</div>
      <hr noshade="true">
      <p class="para_topic">These angles serve as protection angles which are considered during computation of the gouge-free tool path for all classes of turning tools available in Roughing, Finishing and Teachmode. The angle you insert here is internally added to the cutter and used to calculate the cut region. Use cutter clearance angles to create a ramping movement into the material. </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">Non&ndash;zero cutter clearance angles may affect which faces or corners of your part can be reached with cutting moves.</p>
               </div>
            </td>
         </tr>
      </table>
      <p class="para_topic">The figure below shows the effects of entering a cutter clearance angle on the cut region and tool path.</p>
      <table cellspacing="0" align="center">
         <tr valign="top">
            <td colspan="1" rowspan="1" width="50%">
               <p align="center"><img align="bottom" src="graphics/cutter_clearance_0.gif"></p>
            </td>
            <td colspan="1" rowspan="1" width="50%">
               <p align="center"><img align="bottom" src="graphics/cutter_clearance_10.gif"></p>
            </td>
         </tr>
         <tr valign="top">
            <td colspan="1" rowspan="1" width="50%">
               <p class="para_td">Cutter Clearance Angle = 0</p>
            </td>
            <td colspan="1" rowspan="1" width="50%">
               <p class="para_td">Cutter Clearance Angle = 10</p>
            </td>
         </tr>
      </table><br><p class="para_topic">The area marked with the  <img align="bottom" src="graphics/num_1.gif" border="0"> shows the material remaining after the operation. The larger the cutter clearance angle, the less material &nbsp;the system recognizes for cutting in a single operation.
      </p>
      <table border="0">
         <tr>
            <td valign="top" align="left"><img align="left" src="../graphics/warning.gif" alt="Warning" title="Warning"></td>
            <td valign="bottom" align="left" width="100%">
               <div class="para_warning">
                  <p class="para_warning_body">In general, you should not apply cutter clearance angles when using grooving tools. In cases where the grooving tool is the same size as the groove to be cut, cutter clearance angles virtually enlarge the size of the cutter, preventing the tool from fitting into the groove. The system cannot then recognize a cut region. In the figure below, the cutter (yellow) is slightly smaller than the groove. It has, however, been extended by cutter clearance angles (blue), and no longer fits into the groove. In this situation, the system cannot find a cut region.</p>
               </div>
            </td>
         </tr>
      </table>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/cutter_clear_groove.gif"></p>
      </div>
      <div class="title_figure">Width of Grooving Tool Equal to Width of Groove</div>
   </body>
</html>