<!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>Flat pattern terminology</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">Flat pattern terminology</div>
      <hr noshade="true">
      <table cellspacing="3" align="center">
         <tr valign="top">
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1">
               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('sheetmetaldes/flpat_ov.html');return(false);">Flat Pattern Overview</a></p>
            </td>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td">How To</p>
            </td>
            <td bgcolor="#F7F7F7" colspan="1" rowspan="1">
               <p class="para_td"><a class="links" href="javascript:void(0)" onclick="top.openFile('sheetmetaldes/flpat_create.html');return(false);">Options</a></p>
            </td>
         </tr>
      </table><br><table bgcolor="#F0F0F0" cellpadding="2" cellspacing="4" width="95%" align="center">
         <colgroup span="1">
            <col span="1" width="65*">
            <col span="1" width="134*">
         </colgroup>
         <tr valign="top">
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td"><b class="uiTerm">Starting Face</b></p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">This is the first face included in the flat pattern. The <b class="uiTerm">Traverse Control</b> algorithm controls, which additional faces are included in the flat pattern.
               </p>
            </td>
         </tr>
         <tr valign="top">
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td"><b class="uiTerm">Traverse Control</b></p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">This is the method used to identify faces to be included in the flat pattern, given a <b class="uiTerm">Starting Face</b>.
               </p>
            </td>
         </tr>
         <tr valign="top">
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td"><b class="uiTerm">Developable Surface</b></p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">A surface is developable if it flattens without distortion. A developable surface will have zero Gaussian curvature.</p>
            </td>
         </tr>
         <tr valign="top">
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td"><b class="uiTerm">Area Preserving Faces</b></p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">When you select a face as area&ndash;preserving, the system assumes its surface is developable or near developable. If you flatten a non&ndash;developable face using the <b class="uiTerm">Area Preserving</b> algorithm, the results might be undesirable.
               </p>
            </td>
         </tr>
         <tr valign="top">
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td"><b class="uiTerm">Distortion Faces</b></p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">Any face that does not flatten using the<b class="uiTerm"> Area Preserving</b> algorithm will flatten using the <b class="uiTerm">Distortion Faces</b> algorithm. This algorithm requires three mapped edges by previous faces in the flat pattern. It is not a general&ndash;purpose flattener and in some cases will not give desirable results.
               </p>
            </td>
         </tr>
         <tr valign="top">
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td"><b class="uiTerm">Projection Faces</b></p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td"><b class="uiTerm">Projection Faces</b> will not flatten directly. Use them to denote faces from punches and beads. Flat pattern curves, resulting from shared edges between area preserving faces and projection faces, have an attribute denoting them as such.
               </p>
            </td>
         </tr>
         <tr valign="top">
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td"><b class="uiTerm">Master Flat Pattern</b></p>
            </td>
            <td bgcolor="#f7f7f7" colspan="1" rowspan="1" valign="top">
               <p class="para_td">When you enable multiple flat patterns for a single body, only the last flat pattern generated will update. This is the <b class="uiTerm">Master Flat Pattern</b>.
               </p>
            </td>
         </tr>
      </table><br><div class="title_division">Quick start</div>
      <p class="para_division">The simplest method to create a flat pattern is:</p>
      <ul>
         <li>
            <p class="para_item">Choose <b class="uiTerm">Tools&rarr;Flat Pattern</b>.
            </p>
         </li>
         <li>
            <p class="para_item">Select a starting face.</p>
         </li>
         <li>
            <p class="para_item">Press <b class="uiTerm">OK</b> or <b class="uiTerm">Apply</b>.
            </p>
         </li>
      </ul>
      <div class="title_division">General procedure</div>
      <p class="para_division">A more general procedure allows for customization of the flat pattern:</p>
      <ul>
         <li>
            <p class="para_item">Choose <b class="uiTerm">Tools&rarr;Flat Pattern</b>.
            </p>
         </li>
         <li>
            <p class="para_item">Select a starting face.</p>
         </li>
         <li>
            <p class="para_item">Enter a name and layer for the flat pattern. Also set the Location, if necessary. Set the BAF if non&ndash;sheet metal features exist in the model.</p>
         </li>
         <li>
            <p class="para_item">If necessary, select or deselect faces to be included in the flat pattern using <b class="uiTerm">Area Preserving Faces</b>, <b class="uiTerm">Distortion Faces</b>, and <b class="uiTerm">Projection Faces</b>.
            </p>
         </li>
         <li>
            <p class="para_item">Specify other options, such as <b class="uiTerm">Cutting Edges</b>,<b class="uiTerm"> Additional Curves</b>, <b class="uiTerm">Starting Position</b>, and <b class="uiTerm">Starting Orientation</b>.
            </p>
         </li>
         <li>
            <p class="para_item">Make sure that you set all <b class="uiTerm">Flat Pattern Preferences</b> as desired.
            </p>
         </li>
         <li>
            <p class="para_item">Press <b class="uiTerm">OK</b> or <b class="uiTerm">Apply</b> on the <b class="uiTerm">Flat Pattern</b> dialog box to create the flat pattern.
            </p>
         </li>
      </ul>
   </body>
</html>