HEIDENHAIN iTNC 530 (340 420) ISO programming - Manual (Page 350)

350 8 Programming: Cycles
8.1
0
Coor
di
na
te T
ra
n
s
for
m
ati
on Cy
cle
s
DATUM SHIFT with datum tables (Cycle G53)
Function
Datum tables are used for
n frequently recurring machining sequences at various locations on
the workpiece
n
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.
U U U U 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.
Cancellation
n Call a datum shift to the coordinates
X=0; Y=0 etc. from the datum table.
n Execute a datum shift to the coordinates X=0; Y=0 etc. directly with
a cycle definition.
Example: NC blocks
N72 G53 P01 12 *
N
0
N 2
N
4
N 1
N
3
N
5
Z
X
Y
Z
X
Y
X
Y
X
Y
N 0
N 2
N 1
1
2
1
2
If you are using datum shifts with datum tables, then use
the Select Table function to activate the desired datum
table from the NC program.
If you work without the Select Table block %:TAB:, you
must activate the desired datum table before the test run
or the program run (This applies also for the programming
graphics.):
n Use the file management to select the desired table
for a test run in the Test Run operating mode: The
table receives the status S.
n Use the file management in a program run mode to
select the desired table for a program run: The table
receives the status M.
The coordinate values from datum tables are only effective
with absolute coordinate values.
New lines can only be inserted at the end of the table.