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Fillet Featuresfile://C:\Documents and Settings\wentao.HKUST\Local Settings\Temp\~hh8F1F.htm9/7/2010Creating the BaseYou can capture the symmetry of the knob in the design intent of the part. You build one half of the samplepart in this tutorial, then in the Fillet Features tutorial, you mirror the model to create the other half. Anychanges you make to the original half are reflected in the other half.When you relate features to the origin and the planes, you need fewer dimensions and construction entities,and you can more easily modify the part.1. Click New on the Standard toolbar and open a new part.2. Click Extruded Boss/Base on the Features toolbar and open a sketch on the Front plane.3. Click Centerpoint Arc on the Sketch toolbar.4. Drag downward from the origin, then release the pointer.A circumference guideline appears.5. Click and drag an arc approximately 180° counterclockwise around the origin.6. Draw a vertical line from the bottom endpoint of the arc, through the origin, and ending near the upperendpoint of the arc.7. Press escape to release the tool.8. Hold down Ctrl and select the upper endpoints of both the line and arc.
Fillet Featuresfile://C:\Documents and Settings\wentao.HKUST\Local Settings\Temp\~hh8F1F.htm9/7/20109. In the PropertyManager, under Add Relations, select Merge.10. Dimension the arc radius to 15mm.NextCreating the Base (continued)Now you add relations and create an extrude feature.1. Click Select on the Standard toolbar, hold down Ctrl, then select the vertical line and the origin.The Properties PropertyManager appears.2. Under Add Relations, click Midpoint , then click OK .The line is now fully defined.3. Click Exit Sketch on the Sketch toolbar.The Extrude PropertyManager appears.4. Under Direction 1:Select Blind in End Condition. Set Depth to 10.5. Click OK to create the extrude.
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