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      <title>Preferences &ndash; Global parameter values and application options</title>
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      <div class="title_topic2" id="xps10_pagetitle">Preferences &ndash; Global parameter values and application options</div>
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      <p class="para_topic">To set the global values and options for Aerospace Sheet Metal:</p>
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            <p class="para_item">Click <b class="uiTerm">Preferences</b>.
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            <p class="para_item">Select <b class="uiTerm"> Aerospace Sheet Metal</b>.
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      <p class="para_topic">The <b class="uiTerm">Aerospace Sheet Metal Preferences</b> dialog box includes the following three tabs:
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      <div class="title_division">Part properties</div>
      <p class="para_division">All part properties are described in <a class="links" href="javascript:void(0)" onclick="top.popUpPage('nx_sheet_metal/index.html?goto=nx_sheet_metal/ch_def.html&vars=-aux,-home','linkInter','menubar=yes,status=yes,resizable=yes,toolbar=yes,scrollbars=yes,location=no,directories=no');return(false);">NX Sheet Metal: Changing the Defaults</a>.
      </p>
      <div class="title_division">Flat pattern treatments</div>
      <p class="para_division">These parameters only impact flanges created with <a class="links" href="javascript:void(0)" onclick="top.popUpPage('nx_sheet_metal/index.html?goto=nx_sheet_metal/ch_def.html&vars=-aux,-home','linkInter','menubar=yes,status=yes,resizable=yes,toolbar=yes,scrollbars=yes,location=no,directories=no');return(false);">NX Sheet Metal</a>.
      </p>
      <div class="title_division">Joggle preferences</div>
      <p class="para_division">The <b class="uiTerm">Joggle</b> preferences are only available in Aerospace Sheet Metal. Under the <b class="uiTerm">Joggle</b> tab, the following global parameters and flat pattern control options are defined.
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            <p class="para_item"><b class="uiTerm">Joggle Properties</b><a name="ndxgenid_aerospace_sheetmetal6"></a> &ndash; These parameters control the shape of the blends between the joggle transition region and the portion of the flange that is joggled (<b class="uiTerm">Offset Radius</b>) and the portion of the flange that is not joggled (<b class="uiTerm">Stationary Radius</b>). For a complete description of the <b class="uiTerm">Joggle</b> parameters see <a class="links" href="javascript:void(0)" onclick="top.openFile('aerospace_sheetmetal/aero_joggle.html');return(false);">Aerospace Joggle</a>.
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            <p class="para_item"><b class="uiTerm">Joggle Compensations</b><a name="ndxgenid_aerospace_sheetmetal7"></a> &ndash; These values control when a flat pattern compensation is applied to unformed joggles. For a complete description of how these parameters work, see <a class="links" href="javascript:void(0)" onclick="top.openFile('aerospace_sheetmetal/joggle_options.html');return(false);">Apply Compensation in Aerospace Joggle</a>.
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      <div class="title_division">High level Aerospace Sheet Metal workflow</div>
      <p class="para_division">Basic inputs are assumed to be available for the design of an aerospace sheet metal part. For instance, early in the aircraft design process the overall shape of the aircraft body is determined and mold line surfaces are defined. These surfaces are then sectioned by station planes. The sectioned mold line surfaces are basic inputs to sheet metal part design. Wave copies may be used to provide association to the overall aircraft design.</p>
      <p class="para_division">The base of the sheet metal part is created by using a <b class="uiTerm">Tab</b> feature. The <b class="uiTerm">Tab</b> defines a planar web of the part using the station plane. The sectioned surfaces and other geometry may be used to fully define the <b class="uiTerm">Tab</b> profile.
      </p>
      <p class="para_division">Aerospace flanges will then be built onto the tab that align with and are associated to the sectioned mold line surfaces. Additional flanges may also be created.</p>
      <p align="center"><img align="bottom" src="graphics/workflow.gif"></p>
      <p class="para_division">Features such as joggles, flange reliefs, corner reliefs, lightening holes, fastener holes, tooling holes, cutouts, and beads are then added as needed to complete part details. Construction geometry from the aircraft assembly will also be required to define many of the part details. During the process the flanges may be unformed to add detail features in the unformed state. The flanges can then be returned to their formed state to complete the fully formed part. Once the part is fully detailed all of the flanges can be unformed. The flattened version of the part can then be used in Drafting to create a fully annotated flat pattern drawing.</p>
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