There are some new enhancements to the Curves commands in Mastercam 2018. The 2D/3D construction switch will determine if the curves are created on edge or projected to the current construction plane, and there are several new Selection and Filtering options available for both Curve One Edge and Curve All Edges.
When curves are created on the 3D face edges in 3D mode the curves stay on the face edges.
However, if you switch from 3D to 2D construction mode the curves are projected to the current plane and construction elevation.
You can also hold the Shift key and all the tangent edges will be picked with one click.
In the Curve All Edges command you can use CTRL and/or Shift to have tangent or matching radii selected instantly.
Finally, the option check boxes for Ignore Shared Edges and Only Outside Loops allow you to choose multiple faces and keep just the curves you need without redundant or extra geometry in the results.
As you can see, these new options will help get the results you want quickly and reduce your preparation time for making toolpath.
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