Expert Machinist > Undercut Features > To Create an Undercut Feature
To Create an Undercut Feature
1. Click Machining > Undercut.
The UNDERCUT dialog box opens with the following elements:
Feature Name—The default feature name, such as Undercut1 (the system increments the number for the next Undercut feature). You can type a customized name.
Define Feature Ceiling—Select the Ceiling surface for the feature, that is, the top surface of the undercut (similar to defining the Floor surface for other feature types).
Adjust Feature Boundaries—Change the shape of the feature walls using Sketcher.
Define Program Zero—Change the coordinate system used for feature definition and machining.
Adjust Soft Walls—Change Hard Walls to Soft and Soft Walls to Hard.
Adjust Feature Bottom—Adjust the Floor depth of feature (by default, an Undercut extends down until the system finds a horizontal surface of the reference part; if such a surface is not found, the Undercut extends all the way through the stock). To specify a different Floor depth, select a surface, a datum plane, or type a value along the z-axis of the feature-level Program Zero coordinate system.
2. Select the Floor surface(s). On the SELECT SRFS menu, click Done/Return.
3. Use the other elements, if needed. Click next to the element to display the current setting. The Preview button lets you check the feature geometry by highlighting the Hard Walls in red, Soft Walls in cyan.
4. Click OK to complete the feature, Cancel to quit.