Patterns
Introduction
This topic explains the Patterns page of the Project Curves operation found in the Mill 3 Axis Wizard.
Patterns
Cut Pattern

Pick Projection Curves  enables selection mode for you to select the projection curve geometry. Click OK to confirm your selections and return to the wizard. The projection curves can be wireframe geometry which is projected along the Zaxis onto the model or you can select edges directly from the part model.

Type  determines how the toolpath is created from the projection curves using one of the two following options.

User Defined  creates the toolpath directly from the selected projection curves. A single pass is applied to the selected projection curves.

Offset  creates the toolpath using the selected projection curves and then creates offsets of the curves. The area of the model and the number of cuts that are applied from the projection curves are then determined by the Step Direction and Number of Cuts parameters.
Note: The Step Direction and Number of Cuts parameters are only available when the Type is set to Offset.

Step Direction  determines the direction in which the toolpath is applied from the projection curves.

Left  applies the toolpath to the left of the chain direction of the projection curves for open shapes. For closed shapes, this creates the toolpath inside of the shape regardless of the chain direction.

Right  applies the toolpath to the right side of the chain direction of the projection curves for open shapes. For closed shapes, this creates the toolpath outside of the shape regardless of the chain direction.

Both  applies the toolpath to both sides of the projection curves.
The Step Direction parameter is then used in conjunction with the Number of Cuts parameters explained next.

Number of Cuts Left  defines the number of passes that are created to the left side of the selected projection curves when using Step Direction Left or Both.

Number of Cuts Right  defines the number of passes that are created to the right side of the selected projection curves when using Step Direction Right or Both.
Important: When the Number of Cuts parameters are set to zero, the operation applies as many offsets of the curves as possible based on the feature and selected parameters. When greater than zero, the software creates a pass on the projection curves plus the value specified for the Number of Cuts parameters. For example, when setting the Number of Cuts to two, three passes are created.
Method
 Zig  creates the operation so each pass of the tool follows the same general direction (one way machining).
 Zig Zag  creates the operation so each pass of the tool alternates direction from the previous pass.
 User Defined  means that you define the cutting method by setting the chain direction for all projection curves, which is set using the Drive Curves item in the CAM Tree. This option is only available when the Type is also set to User Defined.
Cut Direction

Climb Mill  the tool travels in a counter clockwise direction along the inside shapes of the model and travels in a clockwise direction along the outside edges of the model.

Conventional Mill  the tool travels in a clockwise direction along the inside shapes of the model and travels in a counter clockwise direction along the outside edges of the model.
Sorting
The following options are only available when the Type is set to Offset.

Standard  machining starts from the outer most loop on the part and progresses inwards.

Center Away  machining starts from the inside and progresses outwards within each region.

Outside to Center  machining starts from the outside and progresses inwards within each region.