HEIDENHAIN TNC 426 B, Руководство пользователя

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221 HEIDENHAIN TNC 426 B, TNC 430
DATUM SHIFT with datum tables (Cycle 7)
If you are using the interactive programming graphics
with the datum tables, you must select the desired
datum table (status S) in the TEST RUN mode of
operation before starting the programming graphics.
If you are working with only one datum table, be sure to
activate the correct datum in the program run modes of
operation.
Datums from a datum table can be referenced either to
the current datum or to the machine datum (depending
on machine parameter 7475).
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.
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.
ú
Datum shift: 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.
Example NC blocks:
77 CYCL DEF 7.0 DATUM SHIFT
78 CYCL DEF 7.1 #12
Cancellation
■
Call a datum shift to the coordinates X=0; Y=0 etc. from a datum
table.
■ Execute a datum shift to the coordinates X=0; Y=0 etc. directly via
cycle definition.
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
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