HEIDENHAIN iTNC 530 (340 49x-04) ISO programming - Manual (Page 307)

HEIDENHAIN iTNC 530 307
8.2 P
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int T
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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 cycle 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.
Applies to all 2xx cycles
As soon as the current tool axis position lies below the
clearance height in G79 PAT the TNC displays the error
message PNT: Clearance plane too small. The
clearance height is calculated from the sum of the
workpiece surface coordinate (Q203) and the 2nd set-up
clearance (Q204, or set-up clearance Q200, if the value of
Q200 is greater than Q204).