HEIDENHAIN ITNC 530 - PILOT SMART NC Manual page 156

Circle segment
U Center in 1st axis: Coordinate of the circle center point (1)
in the major axis of the working plane
U Center in 2nd axis: Coordinate of the circle center point (2)
in the minor axis of the working plane
U Diameter: Diameter of the bolt hole circle
U Starting angle: Polar angle of the first machining position.
Reference axis: Major axis of the active machining plane
(e.g. X for tool axis Z). You can enter a positive or negative
value.
U Stepping angle/end angle: Incremental polar angle
between two machining positions. The absolute stopping
angle can alternatively be entered (switch via soft key). You
can enter positive or negative values.
U Number of positions: Total number of machining positions
on the circle
U Top surface coordinate: Coordinate of the top surface of
the workpiece
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