<!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>Outward Trochoidal Options</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_topic4" id="xps10_pagetitle">Outward Trochoidal Options</div>
      <hr noshade="true">
      <table cellspacing="4" align="center">
         <tr valign="top">
            <td bgcolor="#f7f7f7" colspan="1" height="25" rowspan="1">
               <p class="para_td"> <a class="links" href="javascript:void(0)" onclick="top.openFile('mfgmilling/comcut_trochoidal.html');return(false);">Overview</a></p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" height="25" rowspan="1">
               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('mfgmilling/trochoidal_ht.html');return(false);">How To</a> 
               </p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" height="25" rowspan="1">
               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('mfgmilling/trochoidal-list_op.html');return(false);">Options</a></p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" height="25" rowspan="1">
               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('mfgmilling/trocoidal-warn-rt.html');return(false);">Related Topics</a></p>
            </td>
         </tr>
      </table><br><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"><b class="uiTerm">Outward</b> <b class="uiTerm">Trochoidal</b> starts away from part walls and progresses towards the part walls.
                  </p>
               </div>
            </td>
         </tr>
      </table>
      <p class="para_topic">The <b class="uiTerm">Trochoidal</b> settings available on the <b class="uiTerm">Cut Parameters</b> dialog's <b class="uiTerm">Strategy</b> tab when the cut direction is set to <b class="uiTerm">Outward</b> are:
      </p>
      <table cellspacing="2" width="100%" align="center">
         <colgroup span="1">
            <col span="1" width="179*">
            <col span="1" width="95*">
            <col span="1" width="129*">
            <col span="1" width="127*">
         </colgroup>
         <tr>
            <th bgcolor="#c0c0c0" colspan="1" height="45" rowspan="1">
               <p class="para_th">Option</p>
            </th>
            <th bgcolor="#c0c0c0" colspan="1" height="45" rowspan="1">
               <p class="para_th">Minimum Value</p>
            </th>
            <th abbr="" bgcolor="#c0c0c0" colspan="1" height="45" rowspan="1">
               <p class="para_th">Maximum Value</p>
            </th>
            <th abbr="" align="center" bgcolor="silver" colspan="1" rowspan="1">
               <p class="para_th">Default Value</p>
            </th>
         </tr>
         <tr>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1">
               <p class="para_td"><b class="uiTerm">Trochoidal Width</b></p>
               <p class="para_td">This is the diameter,  measured at the path centerline, of the trochoidal circles.</p>
               <p class="para_td"><img align="bottom" src="graphics/out_trochoidal-width.gif" border="0"></p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1">
               <p class="para_td">0</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1">
               <p class="para_td">no limit, but best if no larger than tool diameter </p>
            </td>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td">60% of tool diameter</p>
            </td>
         </tr>
         <tr>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td"><b class="uiTerm">Min Trochoidal Width</b></p>
               <p class="para_td">This is the smallest allowable diameter for the trochoidal circles. Using a variable width increases your tool path control in sharp corners and narrow slots.</p>
               <p class="para_td"><img align="bottom" src="graphics/out_trochoidal-min_width.gif" border="0"></p>
            </td>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td">&gt; 0</p>
            </td>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td">&lt; <b class="uiTerm">Trochoidal Width</b></p>
            </td>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td">20% of the tool diameter </p>
            </td>
         </tr>
         <tr>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1">
               <p class="para_td"><b class="uiTerm">Stepover Limit %</b></p>
               <p class="para_td">Enter the maximum amount by which actual stepover can exceed the <b class="uiTerm">Stepover</b> specified on the main operation page. Trochoidal loops prevent larger stepovers.
               </p>
               <p class="para_td"><img align="bottom" src="graphics/out_trochoidal-stepover_limit.gif" border="0"></p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1">
               <p class="para_td">100%</p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1">
               <p class="para_td">200%</p>
            </td>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td">150%</p>
            </td>
         </tr>
         <tr>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td"><b class="uiTerm">Trochoidal Step Ahead</b></p>
               <p class="para_td">This is the value by which the trochoidal circles are spaced along the tool path.</p>
               <p class="para_td"><img align="bottom" src="graphics/out_trochoidal-step_ahead.gif" border="0"></p>
            </td>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td">&gt; 0</p>
            </td>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td">&lt;= <b class="uiTerm">Stepover</b></p>
            </td>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td">40% of the tool diameter</p>
            </td>
         </tr>
      </table><br><p class="para_topic"></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">Note: Stepover limit (computed distance) must be less than the tool diameter.</p>
               </div>
            </td>
         </tr>
      </table>
      <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">The default <b class="uiTerm">Outward Trochoidal</b> parameters are based on the default <b class="uiTerm">Stepover</b> value of 50%. 
                  </p>
               </div>
            </td>
         </tr>
      </table>
      <p class="para_topic">For hard milling, the stepover is around 10%. The recommended trochoidal settings are:</p>
      <ul>
         <li>
            <p class="para_item"><b class="uiTerm">Stepover Limit %</b> = 150% 
            </p>
         </li>
         <li>
            <p class="para_item"><b class="uiTerm">Trochoidal Step Ahead</b> = 80-100% of the tool path stepover.
            </p>
         </li>
         <li>
            <p class="para_item"><b class="uiTerm">Trochoidal Width</b> = 1.5 times the stepover.  
            </p>
         </li>
      </ul>
      <p class="para_topic">For simple slots, the recommended values are:</p>
      <ul>
         <li>
            <p class="para_item"><b class="uiTerm">Stepover Limit %</b> = 150%
            </p>
         </li>
         <li>
            <p class="para_item"><b class="uiTerm">Trochoidal Step Ahead</b> = same as the tool path stepover.
            </p>
         </li>
         <li>
            <p class="para_item"><b class="uiTerm">Trochoidal Width</b> = width of the slot machining region, tool path stepover.
            </p>
         </li>
      </ul>
   </body>
</html>