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
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Side to machine: Outside
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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.

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