The Axis Control Tab (Trajectory Milling)
When defining a cut in 4 or 5–axis Trajectory milling sequence, you can control the orientation of the tool using options on the Axis Control tab.
1. When creating or editing a 4 or 5-axis Trajectory milling sequence, click Tool Motions on the Trajectory tab.
2. Select Curve Cut or Drive Surface Cut from the Tool Motions list. Depending on your selection the Curve Cut dialog box or the Drive Surface Cut dialog box opens.
3. Select the Axis Control tab on the Curve Cut or Drive Surface Cut dialog box.
4. The following axis Control Type options are available for curve cut:
◦ 3 Axis—The tool axis is parallel to the Z-axis of the NC Sequence coordinate system.
◦ Pivot about a Point/Axis—Select either a pivot point or a pivot axis that the tool passes through while machining the surfaces.
◦ At a Location—Select a series of locations on the model to associate the tool axis definitions with these locations.
◦ Pivot about a Curve—Select a pivot curve that the tool passes through while machining the surfaces.
◦ Normal to a Surface—Select one or more surfaces to which the cutter is normal to when creating the curve cut.
a. Select surfaces to orient the cutting tool in the Reference surfaces collector. The axis of the cutting tool is normal to the selected surfaces.
Optionally, click 
to flip the direction of the cutting tool on the selected reference surfaces.
to flip the direction of the cutting tool on the selected reference surfaces.b. Define the options for Trajectory Curves Location and Orientation.
▪ Located on or close to reference surfaces—Specifies that the trajectory curves coincide with the surfaces or are close to the surfaces. Select one of the following
▪ Normal direction defined at trajectory curve position—The normal direction of the tool is defined at the trajectory curve position.
▪ Normal direction defined at tool offset position (default)—The normal direction of the tool is defined at the tool offset position.
▪ At an offset location from the reference surfaces—Specifies that the trajectory curves are distant from the reference surfaces.
 | • The At an offset location from the reference surfaces option is supported for the Milling, End Mill, and Ball Mill tools. • The trajectory curve must lie within the extreme edges of the normal surface reference for generating the toolpath successfully. |
5. The following axis control options are available for a drive surface cut:
◦ From Drive Surface—Select a single drive surface or multiple drive surfaces to set the tool orientation. You can use drive surface to modify tool axis definitions on an edge but not with a point.
◦ At a Location—Select a series of locations on the model to associate the tool axis definitions with these locations.
| | The Lead Angle and Tilt Angle options are not available for 4-axis steps. |