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      <title>Start/Stop on unaltered boundary</title>
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      <div class="title_topic3" id="xps10_pagetitle">Start/Stop on unaltered boundary</div>
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      <p class="para_topic">Depending on your geometry and tool shape, it may be more efficient for the system evaluate the drive curve subsection before offset and gouge avoidance are calculated. This would appear as follows:</p>
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         <p align="center"><img align="bottom" src="graphics/teach/unaltered_boundary_on.gif"></p>
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      <div class="title_figure">Start/Stop on Unaltered Boundary ON </div>
      <p class="para_topic">When this option is inactive, the system first calculates the offset and gouge-free tool path, then trims this tool path at the specified Start Point as follows:</p>
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         <p align="center"><img align="bottom" src="graphics/teach/unaltered_boundary_off.gif"></p>
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      <div class="title_figure">Start/Stop on Unaltered Boundary OFF</div>
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