To Create a Variable Draft
This procedure is based on the procedure for creating a basic Draft feature. For detailed information on how to create a basic Draft feature, follow the link under Related Links.
1. Click Model > Draft. Create a basic Draft feature by selecting the draft surfaces from a single body or a single quilt, the draft hinge, and the pull direction.
The system displays the preview geometry for a constant draft with the default angle. The default draft angle value is displayed in the graphics window and in the Angle 1 box. The system also displays two drag handles. One is located on the draft hinge. It controls the location of the draft angle application. Next to it, the system displays the location factor along the reference edge of the draft surface. The other handle is connected to the draft angle. It controls the draft angle value.
2. To create an additional draft angle control, right-click the handle connected to a draft angle and choose Add Angle from the shortcut menu. The system adds another pair of drag handles at a default location, usually halfway between the current draft angle location and the endpoint of the reference edge (or the adjacent draft angle location, if there is one). The default draft angle value is the same as the current one.
3. To modify the location of the new draft angle, click the handle and drag it along the edge, or double-click the location value in the graphics window and type or select the new value.
4. To modify the draft angle, type or select the new value in the Angle 1 box. You can also drag the handle connected to the draft angle, or double-click the draft angle value in the graphics window and type or select the new value.
5. Repeat steps 2 through 4 to create additional draft angle controls, as necessary.
6. When satisfied with the feature geometry, click OK.
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You can use the Angles tab to add or delete draft angles and modify their values and locations.
Another way to add a draft angle is to hold down the CTRL key, click the handle connected to a draft angle and drag it along the edge to the desired location.
To revert to a constant draft, use the Make Constant command on the shortcut menu. It deletes all the draft angles except the first one.
If you are using a datum plane or a quilt as a draft hinge, the additional draft angle controls are located on the draft surface contour and projected along the Pull Direction to the intersection with the draft hinge. You can drag the draft angle control along the draft surface perimeter to be located on a different edge, if desired. The location value reflects the position along the current reference edge.