Trimming a surface with a curve

To trim a surface, the model must contain a surface and a curve that bounds the area to be trimmed in the part model. The curve must cut across the surface boundary at two points for an open trim, or be contained completely within the surface.

To use Trim Surface:

1. Select Construct tab > Surfaces panel > From 1 Surface > Trim to display the Trim Surface with Curve dialog.
2. Select Create new surface(s) to create a new surface or Modify existing surface(s) to trim the selected surface.
3. Optionally enter a name in the Surface name field. This field is available only if Create new surface(s) is selected.
4. Select a surface from the Surface list and click the Add item from list button, or click the Pick surface button and select it in the graphics window. Picking the surface in the graphics window tells FeatureCAM which side to keep.
5. Select a curve from the Trimming Curve list and click the Add item from list button, or click the Pick curve button and select it in the graphics window.
6. Enter a Curve Tolerance. This determines the accuracy of the approximation to the curve.
7. Enter a Surface Tolerance. This determines the accuracy of the approximation to the surface.
8. If you want to change which side of the surface is kept, select a surface from the Surface list and click to toggle whether trim is decided by pick location.
9. Click Preview to display a preview of the surface in the graphics window.
10. Click OK.