HEIDENHAIN TNC 426 (280 476) - Manual (Page 112)

HEIDENHAIN TNC 426, TNC 430 85
4.13 P
allet Oper
ation with T
ool-Or
ient
e
d Mac
h
ining
n
DATUM (entry optional):
Name of the datum table. The datum table must be stored in the
same directory as the pallet table. Otherwise you must enter the full
path name for the datum table. Datums from the datum table can be
activated in the NC program with Cycle 7 DATUM SHIFT.
n X, Y, Z (entry optional, other axes also possible):
For pallets and fixtures, the programmed coordinates are referenced
to the machine datum. For NC programs, the programmed
coordinates are referenced to the pallet or fixture datum. These
entries overwrite the datum that you last set in the Manual mode of
operation. With the miscellaneous function M104 you can reactivate
the datum that was last set. With the actual-position-capture key,
the TNC opens a window that enables you to have the TNC enter
various points as datums (see table below):
With the arrow keys and ENT, select the position that you wish to
confirm. Then press the ALL VALUES soft key so that the TNC saves
the respective coordinates of all active axes in the pallet table. With
the PRESENT VALUE soft key, the TNC saves the coordinates of the
axis on which the highlight in the pallet table is presently located.
n SP-X, SP-Y, SP-Z (entry optional, other axes also possible):
Safety positions can be entered for the axes. These positions can be
read with SYSREAD FN18 ID510 NR 6 from NC macros. SYSREAD
FN18 ID510 NR 5 can be used to determine if a value was
programmed in the column. The positions entered are only
approached if these values are read and correspondingly
programmed in the NC macros.
Position Meaning
Actual values Enter the coordinates of the current tool position
relative to the active coordinate system.
Reference
values Enter the coordinates of the current tool position
relative to the machine datum.
ACTL measured
values
Enter the coordinates relative to the active
coordinate system of the datum last probed in
the Manual operating mode.
REF measured
values
Enter the coordinates relative to the machine
datum of the datum last probed in the Manual
operating mode.
If you have not defined a pallet before an NC program, the
programmed coordinates are then referenced to the
machine datum. If you do not define an entry, the datum
that was set manually remains active.