<!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>Area Milling Drive Method</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_topic5" id="xps10_pagetitle">Area Milling Drive Method</div>
      <hr noshade="true">
      <p class="para_topic">The Area Milling Drive Method enables you to define a Fixed Axis Surface Contouring operation by specifying a cut area and, if desired, adding Steep Containment and Trim Boundary constraints. This drive method is similar to the Boundary Drive Method, but requires no drive geometry and uses a robust and automated computation of collision-free containment. It is available only for Fixed Axis Surface Contouring operations. requires no drive geometry For these reasons, you should use the Area Milling Drive Method in place of the Boundary Drive Method whenever possible.</p>
      <p class="para_topic">Cut Area may be defined by selecting Surface Regions, Sheet Bodies, or Faces. Unlike the Surface Area Drive Method, the cut area geometry need not be selected in an orderly grid of rows and columns.</p>
      <p class="para_topic">If you do not specify a Cut Area, the system will use the entire defined Part Geometry (excluding areas not accessible by the tool) as the cut area. In other words, the system will use the silhouette of the part as the cut area. Edge Tracing cannot be removed if the entire Part geometry is used and no Cut Area is defined.</p>
      <p class="para_topic">Area Milling Drive Method may use a Zig-Zag with Lifts Cut Type. This Cut Type lifts the tool between passes according to the specification for local Engage, Retract, and Traverse moves. It does not output Departure and Approach moves.</p>
      <p class="para_topic">In the Fixed Contour dialog, In the Drive Method area, specify the desired parameters by pressing the wrench icon, select your parameters, and press OK to accept. In the Fixed Contour Dialog, choose Cut Area and Select to define the cut area geometry. If you do not define the cut area geometry, the system will use the silhouette of the part.</p>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/fixcont_dialog.gif"></p>
      </div>
      <div class="title_figure">Area Milling Drive Method</div>
      <p class="para_topic">You may further constrain the cut regions by using Trim. You may define the area of the cut region to be excluded from the operation by specifying Trim Side as Inside or Outside. Trim boundaries are always Closed, always use an On condition, and are projected to the Part geometry along the tool axis vector. More than one Trim Boundary may be defined. In the Cutting dialog box, you may specify a Boundary Stock to define the distance the tool is positioned from the Trim Boundary, and Boundary Intol/Outol.</p>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/fixcont_trimbndry.gif"></p>
      </div>
      <div class="title_figure">Trim Boundary</div>
      <div class="title_division">Pattern</div>
      <p class="para_division">The Patterns used in the Area Milling Drive Method are the same as those used in the Boundary Drive Method.</p>
      <div class="title_division">Cut Type</div>
      <p class="para_division">The Cut Types used in the Area Milling Drive Method are the same as those used in the Boundary Drive Method, except for the addition of Zig-Zag with Lifts. This Cut Type lifts the tool between passes according to the specifications for local Engage, Retract, and Traverse moves.</p>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/zzlifts.gif"></p>
      </div>
      <div class="title_figure">Zig-Zag with Lifts</div>
      <div class="title_division">Cut Angle</div>
      <p class="para_division">Cut Angle determines the angle of rotation of the cutting pattern about the ZC axis with respect to the XC axis. Refer to the discussion of Cut Angle in the Boundary Drive Method for additional details.</p>
      <div class="title_division">Display Cut Direction</div>
      <p class="para_division">This option is available if the Cut Angle is set to User Defined. A cut direction vector will be displayed.</p>
   </body>
</html>