HEIDENHAIN iTNC 530 (340 49x-04) ISO programming - Manual (Page 458)

458 8 Programming: Cycles
8.9 Coor
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T
ransf
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mation Cy
cles
Application
Datum tables are used for
„ frequently recurring machining sequences at various locations on
the workpiece
„ frequent use of the same datum shift
Within a program, you can either program datum points directly in the
cycle definition or call them from a datum table.
 Shift: Table row? P01: Enter the number of the
datum from the datum table or a Q parameter. If you
enter a Q parameter, the TNC activates the datum
number found in the Q parameter.
Cancelation
„ Call a datum shift to the coordinates
X=0; Y=0 etc. from the datum table.
„ Execute a datum shift to the coordinates X=0, Y=0 etc. directly with
a cycle definition.
Selecting a datum table in the part program
With the Select Table (%:TAB:) function, you select the datum table
from which the TNC takes the datums:
 To select the functions for program call, press the
PGM CALL key.
 Press the DATUM TABLE soft key.
 Enter the complete path name of the datum table and
confirm your entry with the END key.
Program a %:TAB: block before Cycle G53 Datum Shift.
A datum table selected with Select Table remains active
until you select another datum table with %:TAB: or
through PGM MGT.