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      <div class="title_topic3" id="xps10_pagetitle">Machining parameters</div>
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      <p class="para_topic">Machining Parameters enable you to specify Stock values, Feed Rates, Post Commands, and Avoidance geometry. Most of the Machining Parameters, options are common to many processors or to Lathe Rough and Lathe Finish. Refer to the Lathe Finish dialog box illustrated at the beginning of this chapter for the appropriate reference pages. The options described below are unique to Lathe Finish.</p>
      <div class="title_division">Stock</div>
      <p class="para_division">The Stock option allows you to specify the amount of material to be left on the part. If the Groove Control method is Automatic, you can add stock to the boundary for roughing or finishing the groove.</p>
      <p class="para_division">When you define stock values you should be aware of the following:</p>
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         <li>
            <p class="para_item">You cannot reliably specify a negative Stock value greater than the tool radius.</p>
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         <li>
            <p class="para_item">Stock values are only applied to linear segments. Circular segments are adjusted in relation to the stocked linear segments.</p>
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         <li>
            <p class="para_item">When a custom stock value has been defined for the boundary or any its segments, the custom stock value will override the Rough or Finish stock values.</p>
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      <div class="title_division">Rough Stock</div>
      <p class="para_division">Rough Stock allows you to leave behind additional material along the entire boundary of the groove during roughing passes. Rough Stock is applied only if the Cut Type is ROUGH ONLY or ROUGH AND FINISH.</p>
      <div class="title_division">Finish Stock</div>
      <p class="para_division">Finish Stock allows you to leave behind additional material along the entire boundary of the groove during finishing passes. Finish Stock is applied only if the Cut Type is FINISH ONLY or ROUGH AND FINISH.</p>
      <p class="para_division">The system adds the Face Stock and Radial Stock values to the Finish Stock value.</p>
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         <p align="center"><img align="bottom" src="graphics/lathe/lgroov_macAt04.gif"></p>
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      <div class="title_figure">Face Stock and Radial Stock Added to Finish Stock</div>
      <div class="title_division">Face Stock</div>
      <p class="para_division">Face Stock allows you to leave additional material along segments that are perpendicular, or nearly perpendicular to, the part centerline. Face Stock only applies to face grooves. Face Stock is only applied during the finish pass for Automatic grooves.</p>
      <div class="title_division">Radial Stock</div>
      <p class="para_division">Radial Stock allows you to leave additional material along segments that are parallel, or nearly parallel to, the part centerline. Radial Stock only applies to radial grooves. Radial Stock is only applied during the finish pass for Automatic grooves.</p>
      <div class="title_division">Min Clearance</div>
      <p class="para_division">Minimum Clearance allows you to establish a safety zone around the part for non-cutting tool motions. The tool remains at least the minimum clearance distance from the part in non-cutting tool motions until the end of path. The minimum clearance is measured from the &quot;lowest&quot; top segment. The specified Minimum Clearance value must be positive.</p>
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         <p align="center"><img align="bottom" src="graphics/lathe/lgroov_macAt03.gif"></p>
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      <div class="title_figure">Minimum Clearance</div>
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            <td valign="top" align="left"><img align="left" src="../graphics/warning.gif" alt="Warning" title="Warning"></td>
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               <div class="para_warning">
                  <p class="para_warning_body">  CAUTION: The tool rapids to the minimum clearance distance from the previously specified Start Point (Plunge Method) or the system determined first cut point (Automatic Method), and then proceeds at the cut feedrate. If you set no minimum clearance distance, undesirable conditions may result.</p>
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      <div class="title_division">Local Return</div>
      <p class="para_division">Local Return allows you to define the location where you want the tool to pause during the operation. This option also allows you to insert OPSTOP, OPSKIP, or DELAY statements in the tool path. Local Return moves are only created during plunge motions. They are not available for level cut methods (left-to-right, right-to-left, or zig-zag) or finish passes.</p>
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               <div class="para_note">
                  <p class="para_note_body"> NOTE: Most of these options work same way as they do for Lathe Rough.</p>
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      <p class="para_division">Local Return Pt allows you to to define a position to which the tool returns following completion of a specific number of plunges.</p>
      <p class="para_division">Return Move allows you to specify the method for the tool to move to the Local Return Point.</p>
      <p class="para_division">Opstop allows you to output an OPSTOP command to the tool path.</p>
      <p class="para_division">Opskip allows you to output an OPSKIP command to the tool path.</p>
      <p class="para_division">Delay allows you to specify a dwell interval (Delay) in tool motion at the end of a specific number of machining plunges.</p>
      <p class="para_division">Frequency allows you to define how often the tool will be moved to the local return point. You may define the frequency in terms of the number of plunges, the number of cycles, or depth. Choose one of the following:</p>
      <p class="para_division">Every N Plungesallows you to define the frequency of the local returns in terms of how often the tool plunges into the material. This option also allows you to enter the number of plunges. The default is 1 which means that you will have a local return after every plunge.</p>
      <p class="para_division">Every N Cyclesallows you to define the frequency of the local returns in terms of the Chip Control cycle. This option also allows you to enter the number of cycles. The default is 1 which means that you will have a local return after every chip control cycle.</p>
      <p class="para_division">By Depthallows you to define the frequency of the local+ returns in terms of how deeply the groove has been cut. This option also allows you to enter the depth that must be cut before a local return occurs. The default is 0.1 which means that you will have a local return after 0.1 units (e.g., inches) of material has been removed.</p>
      <p class="para_division">Resequence Output allows you to change the output order of Return Move, Opstop, Opskip, and Delay commands in the tool path.</p>
      <p class="para_division">Local Return allows you to specify whether the above described Local Return parameters are Active or Inactive.</p>
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