To Create a Sloped Mill Surface
1. Click > 
Sloped. The Mill Surface for Slope Control dialog box opens with the following elements:
Sloped. The Mill Surface for Slope Control dialog box opens with the following elements:◦ Surfaces—Specify the set of surfaces to be initially included in the Mill Surface definition.
◦ Direction—Specify a direction for measuring the slope angle.
◦ Angle—Specify the slope angle.
◦ Steep/Shallow—Specify whether you want to keep the steep or the shallow side.
The SURF SELECT menu appears.
2. Define the Surfaces element. You can include the surfaces using any combination of the following options:
◦ Indiv Surfs—Select individual surfaces one-by-one.
◦ Surf & Bnd—Gather surfaces to be included by selecting the seed surface and the bounding surfaces.
◦ Loop Surfs—Include a closed loop of surfaces by selecting a face they surround.
◦ Quilt Surfs—Select a Surface feature (for example, an existing Mill Surface) to include all of its patches.
◦ Solid Surfs—Select a part to include all of its surfaces.
On the SURF SELECT menu, click Done when finished.
3. Define the Direction element using one of the following options:
◦ Plane—Select a plane. Creo NC displays a red arrow normal to the plane. Finalize the direction by using Flip or Okay.
◦ Crv/Edg/Axis—Select a straight edge, curve segment, or a datum axis. Creo NC displays a red arrow along the selected entity. Finalize the direction by using Flip or Okay.
◦ Csys—Select a coordinate system and specify which of its axes to use. The system displays a red arrow along the selected axis. Finalize the direction by using the Flip or Okay.
4. Define the Angle element by typing a value at the prompt.
5. Define the Steep/Shallow element using one of the following options:
◦ Keep Steep Side—Creo NC keeps only those portions of the selected surfaces where the angle between the surface normal and the direction vector is greater than the specified angle value.
◦ Keep Shallow Side—Creo NC keeps only those portions of the selected surfaces where the angle between the surface normal and the Direction vector is less than the specified Angle value.
6. Click Preview to view the Mill Surface. Click OK to create the sloped mill surface.