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      <title>Behavior on Irregular Shapes</title>
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      <div class="title_topic3" id="xps10_pagetitle">Behavior on Irregular Shapes</div>
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      <p class="para_topic">Zig-Zag Facemilling Stepovers follow the boundaries of selected faces. &nbsp;When the boundaries are convex, this is appropriate so that the tool does not drag across the face during stepover. &nbsp;However, when the boundaries are concave, following these boundaries is simply wasted motion. &nbsp;Behavior on Irregular Shapes ensures that stepover moves make the shortest possible path that neither drag across the milled face nor violate any part or check geometry </p>
      <div class="title_division">Direct Stepovers for Zig-Zag Cut Types</div>
      <p class="para_division">The Zig-Zag stepovers in a Face Milling operation are automatically optimized when the contour shape of the face between adjacent zig passes is concave. If the shape of the face is concave and there is no part or check geometry interfering, the stepover is made directly to the next zig pass, as shown in the figure below. &nbsp;The stepover motion between passes uses the shortest, most direct path possible without violating the part or dragging the tool over the part.</p>
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         <p align="center"><img align="bottom" src="graphics/zz_stepover.gif"></p>
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      <div class="title_figure">Face Milling Zig Zag Operation - Optimized Stepovers </div>
      <p class="para_division">The number 1 in the figure above illustrates that the stepover (in green) is direct where the shape of the face (dashed) is concave.</p>
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