HEIDENHAIN iTNC 530 (340 420) ISO programming - Manual (Page 221)

HEIDENHAIN iTNC 530 221
8.2 P
oint
T
a
bles
Effect of the point tables with Cycles G200 to G204
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 210 to 215
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.