This parameter specifies the angle between cross feed movement and the withdraw move. For both roughing and finishing passes this angle is measured against the roughing scanlines.
Withdraw length
Boundary
Clearance
Depth
An angle of
90
retracts perpendicular to the roughing pass. An angle of
45 pulls back away from the part and the chuck. An angle of
135 pulls toward the chuck. The withdraw angle for finishing is not dependent on the shape of the feature curve. Even if no roughing pass is created, the withdraw angle for finishing pass is measured against the roughing scanlines.
The Engage angle and Withdraw angle are specified from the path (or extension of the path), relative to the side of the path that the tool is on, and the direction in which the tool is traveling. In the graphic below, Point 1 is the calculated engage point and the Point 6 is the calculated withdraw point.
