When TNR comp is off, the part entry angle is controlled by the Engage angle attribute.
Engage angle
Enter the approach angle for the tool, measured away from the part. An angle of 0 approaches along the path. An angle of 90 approaches perpendicular to the path. If the beginning of a scan line begins with a shoulder, a value of 90 is used automatically for that scan line. The only valid values are 0 or 90 degrees.
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.
Clearance
Withdraw angle
Clearance zone
Engage angle