HEIDENHAIN TNC 426, User Manual

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80 4 Programming: Fundamentals of NC, File Management, Programming Aids, Pallet Management
4.12 P
a
llet Manag
e
ment
4.12 Pallet Management
Application
Pallet tables are used for machining centers with pallet changer: The
pallet table calls the part programs that are required for the different
pallets, and activates datum shifts or datum tables.
You can also use pallet tables to run in succession several programs
that have different datums.
Pallet tables contain the following information:
n
PAL/PGM (entry obligatory):
Identification for pallet or NC program (select with ENT or NO ENT)
n
NAME (entry obligatory):
Pallet or program name. The machine tool builder determines the
pallet name (see Machine Manual). The program name must be
stored in the same directory as the pallet table. Otherwise you must
enter the full path name for the program.
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 pallet names, the programmed coordinates are referenced to
the machine datum. For NC programs, the programmed coordinates
are referenced to the pallet 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):
Pallet table management is a machine-dependent
function. The standard functional range will be described
in the following. Refer to your machine manual for more
information.
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.