1 – 6 HEIDENHAIN Technical Manual TNC 426, TNC 430
1.5 Tool-Oriented Machining
As of NC software 280 476-17, “tool-oriented” pallet table machining is also
possible. For more information, please refer to the User's Manual.
A special tool-change macro is required for tool-oriented pallet machining. This
is defined through the keyword TCTOOLMODE= in NCMACRO.SYS.
This macro is called for tool oriented machining instead of the tool-change
macro. If this macro is not defined in NCMACRO.SYS, a HEIDENHAIN standard
macro is run.
The HEIDENHAIN standard macro performs the following functions:
n Positioning to clearance height
n Execution of M146
n Tool change through TOOL CALL. The existing tool-change macro is called.
The following new functions are available for interrogating whether a
clearance height was programmed in the pallet table:
n FN18: SYSREAD ID510 NR5 IDX(axis)
This function can ascertain whether a clearance height was programmed for
the corresponding axis.
n FN18: SYSREAD ID510 NR6 IDX(axis)
This function can ascertain the clearance height for the corresponding axis.
With the M function M146 the current geometry information is saved in a
temporary file.
An NC macro can be defined through the keyword CLAMP= in NCMACRO.SYS. The
macro is called when a loaded fixture (FIX) is called.
In addition to the standard prototype for pallet tables, the COPY SAMPLE
FILES soft key copies the prototype for tool-oriented pallet table machining
into the PLC:\PROTO directory. Both prototypes are offered when you create a
new pallet table. If you do not want this, delete a prototype from the
PLC:\PROTO directory. The existing prototype is then used automatically.
n Prototyp.P = standard prototype
n Proto_to.P = prototype for tool-oriented machining
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