Creating Sections and Guide curves

To construct a lofted boss, you need to create sections and guide curves.

1. Open a new file in the Part Environment.
2. On the CommandManager, click Sketch > Sketch.
3. Select the top plane.
4. On the CommandManager, click Sketch > Ellipse.
5. Select the origin point of the sketch.
6. Move the pointer horizontally and left click.
7. Move the pointer vertically and left click.

1. Create two centerlines passing to the origin and perpendicular to each other, as shown.

1. Activate Smart Dimension tool and add dimensions to the centerlines, as shown.

1. Click Exit Sketch.
2. Change the orientation to Isometric.
3. On the CommandManager, click Sketch > Sketch.
4. Select the front plane.
5. On the CommandManager, click Sketch > Spline.
6. Draw a spline similar to the one shown in figure.

1. Press the Ctrl key and click on the first point of the spline and the previous sketch.
2. On the PropertyManager, under the Add Relations section, click Pierce.
3. Draw a vertical centreline starting from the origin point.
4. Apply dimensions to the spline, as shown in figure. First, create the horizontal dimensions, and then create the vertical dimensions in the descending order.

1. Draw a vertical centerline passing through the sketch origin.
2. On the CommandManager, click Sketch > Mirror Entities.
3. Select the spline.
4. On the PropertyManager, click Mirror about, and then select the vertical centerline.
5. Click OK.

1. Click Exit Sketch.
2. Change the view orientation to Isometric.