HEIDENHAIN iTNC 530 (340 422) ISO programming - Manual (Page 229)

HEIDENHAIN iTNC 530 229
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Effect of the point tables with Cycles G200 to G208 and G262 to
G267
The TNC interprets the points of the working plane as coordinates of
the hole centers. If you want to use the coordinate defined in the point
table for the spindle axis as the starting point coordinate, you must
define the workpiece surface coordinate (Q203) as 0.
Effect of the point tables with Cycles G210 to G215
The TNC interprets the points as an additional datum shift. If you want
to use the points defined in the point table as starting-point
coordinates, you must define the starting points and the workpiece
surface coordinate (Q203) in the respective milling cycle as 0.
Effect of the point tables with Cycles G251 to G254
The TNC interprets the points of the working plane as coordinates of
the starting point. If you want to use the coordinate defined in the
point table for the spindle axis as the starting point coordinate, you
must define the workpiece surface coordinate (Q203) as 0.