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      <title>Cut Regions</title>
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      <div class="title_topic5" id="xps10_pagetitle">Cut Regions</div>
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      <p class="para_topic">The Cut Regions section of the dialog box contains two buttons, Options and Display, that enable you to define Start Points and to specify how cut regions are graphically displayed for visual reference.</p>
      <div class="title_division">Options</div>
      <p class="para_division">Options displays a dialog box that enables you to create start points automatically or interactively, and to specify how cut regions will be graphically displayed when the Display button is selected.</p>
      <p class="para_division">The Cut Region Start Points section of this dialog box enables you to create start points automatically or interactively using the following options.</p>
      <p class="para_division">Custom allows you to interactively define one or more Start Points for the cut region using the Point Subfunction. Custom activates the Select button which enables you to initially define the Start Points. The Add, Select, and Display buttons are described below.</p>
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         <p align="center"><img align="bottom" src="graphics/stpts_cutreg.gif"></p>
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      <div class="title_figure">Start Points and Cut Region</div>
      <p class="para_division">The Start Point defines the proximity in which the tool begins cutting. The user-defined (Custom) Start Points do not necessarily define the exact starting position, but rather the general area of the cut region in which to start cutting. The system determines the exact starting position based on the Start Point location, the specified Cut Type, and shape of the cut region. If multiple Start Points are specified, the system uses the Start Point closest to the cut region.</p>
      <p class="para_division">In the illustration above, for example, the system uses Start Point A to define the tool starting position because it is the closest Start Point to the cut region. The tool, however, cannot position directly on the point without violating the specified Zig-Zag cut type. The tool therefore chooses a starting position as close as possible to the Start Point which does not violate the cutting parameters.</p>
      <p class="para_division">Automatic allows the system to define a single Start Point for the cut region and requires no additional user interaction.</p>
      <p class="para_division">Add enables you to continue defining Start Points once they have been initially defined using Custom.</p>
      <p class="para_division">Select displays the Point Subfunction enabling you to initially define one or more Start Points. If more than one Start Point is defined, the system uses the point closest to the cut region to define the tool starting position. Once the Start Points have been initially defined, this option changes to Reselect which enables you to redefine all Start Points.</p>
      <p class="para_division">Display generates visual reference indicators that illustrate the positions of the Start Points.</p>
      <p class="para_division">The Cut Region Display Options section of this dialog box consists of the four buttons described below that enable you define how the cut regions are graphically displayed. These buttons are not mutually exclusive and may be used in any desired combination.</p>
      <p class="para_division">Tool End creates a temporary display curve on the Part Surface defined by tracing the tip of the tool. The tip is traced regardless of whether or not it actually contacts the Part Surface.</p>
      <p class="para_division">Contact Point creates a series of temporary display points on the Part Surface defined by the contact point of the tool.</p>
      <p class="para_division">Contact Normal creates a series of temporary display vectors on the Part Surface. The vectors are normal to the Part Surface and defined by the tool contact points.</p>
      <p class="para_division">Tool End on Projection creates a temporary display curve projected on to the boundary plane. If there is no boundary, the temporary display curve is projected on to a plane normal to the projection vector at the WCS origin. This option displays the combined cut regions that the system recognizes when determining the tool path.</p>
      <div class="title_division">Display</div>
      <p class="para_division">Display generates a temporary screen display of the cut regions for visual reference. The display is generated using the parameters specified under Cut Region Display Options.</p>
      <div class="title_division">Climb Cut / Conventional Cut</div>
      <p class="para_division">Climb Cut and Conventional Cut allow you to define the direction the Drive Path cuts in relationship to the spindle rotation. These options are only available for the Zig, Zig with Contour, and Zig with Stepover Cut Types.</p>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/climb_conven.gif"></p>
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      <div class="title_figure">Climb Cut and Conventional Cut</div>
      <div class="title_division">Projection Vector</div>
      <p class="para_division">Projection Vector is an option common to most Drive Methods. It enables you to determine how the Drive Points project to the Part Surface.</p>
      <div class="title_division">Display Drive Path</div>
      <p class="para_division">Display Drive Path displays the Drive Path used to generate the Tool Path. The path is created as a temporary element projected onto the WCS along the tool axis and is for visual reference only.</p>
      <div class="figure">
         <p align="center"><img align="bottom" src="graphics/drvpth_zz.gif"></p>
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      <div class="title_figure">Drive Path for Zig-Zag Cut Type</div>
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