HEIDENHAIN TNC 426B (280 472) ISO programming - Manual (Page 239)

223 HEIDENHAIN TNC 410, TNC 426, TNC 430
8.9 Coordinate transformation cycles
Once a contour has been programmed, you can position it on the
workpiece at various locations and in different sizes through the
use of coordinate transformations. The TNC provides the following
coordinate transformation cycles:
Cycle Soft key
G53/G54 DATUM SHIFT
For shifting contours directly within the program
or with datum tables
G28 MIRROR IMAGE
For mirroring contours
G73 ROTATION
For rotating contours in the working plane
G72 SCALING FACTOR
For increasing or reducing the size of contours
G80 WORKING PLANE
For executing machining operations in a tilted
coordinate system on machines with swivel heads
and/or tilting tables (not TNC 410)
Effect of coordinate transformations
A coordinate transformation becomes effective as soon as it is
defined — it is not called. It remains in effect until it is changed or
canceled.
To cancel coordinate transformations:
■ Define cycles for basic behavior with a new value, such as scaling
factor 1.0
■ Execute a miscellaneous function M02, M30, or an N999999 %...
block (depending on machine parameter 7300)
■ Select a new program
8.9 Coor
dinat
e
T
ransf
or
mation Cy
cles
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