Advanced Machining (AMG) - P2

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Cavities Roughing  - Limit Definition Limit Definition 
Defines what area of the part will be machined with respect to the limiting contour(s).
It can either be inside or outside. In the pictures below, there are three limiting contours on the rough stock.
The yellow areas will be machined.
Side to machine: Inside
Side to machine: Outside
The limiting contour is used to limit the cutting motions.
It does not avoid that approach or retract motions stay outside the limiting contour.
To keep approach and retract motions inside the limiting contour, we recommend that you define a check surface with holes or a mask.

With R20 release, the tool motion is added along the limit line on both sides, to remove residual material around the limit line and secures the machining on lower levels. Now, there is no collision between the residual material and tool holder and height of removed material is also not greater than the distance between levels. The machining trajectory is more secure because of these paths and removes residual material on both sides before machining the bottom.