HEIDENHAIN ITNC 530 - PILOT SMART NC Manual page 114

U Center angle (Only in effect if tangential approach on a circular path
was selected): Angle of the circular arc
U Distance to aux. point (Only in effect if tangential approach on a
straight path or vertical approach was selected): Distance to the
auxiliary point from which the contour is approached
U Contour name: Name of the contour file (.HC) to be machined. If the
DXF converter option is available, you can use it to make a contour
directly from the form.
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