Fanuc Series 15i/150i-MA (Programming) Operators Manual

B-63324EN/03 PROGRAMMING 10.TOOL FUNCTION (T FUNCTION)
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- Time specification (LTM = 1)
Once all the registered tool life management data has been deleted,
programmed tool life management data is registered.
When a tool group command (T code) is specified, a tool whose service
life has not expired is selected from the group. The service life
management for the selected tool is started with the tool change
command (M06). Service management (counting) is performed at
certain intervals (1 second or 0.1 second) while the tool is actually
being used in cutting mode. This service life count interval can be
specified using bit 0 (FCO) of parameter No. 7403. The time required
for single block stop, feed hold, dwell, machine lock, and interlock is
not counted.
By setting bit 3 (LFV) of parameter No. 7401, service life count can be
overridden using the service life count override signal. An override of
0 to 99.8 times can be used. When 0 times is specified, no count is
performed.
NOTE
1 When a tool whose life has not expired is selected, a
search is made forward, starting with the tool that is
currently being used. When the last tool is reached,
search restarts from the first tool. If there are no tools
whose service life has not expired, the last tool is
selected. When the tool currently being used is
replaced using the tool skip signal, a new tool is
selected as described above.
2 When the service life of the final tool in a group
expires as judged from tool life counting, the tool
change signal is output. If the time-based service life
count system is selected, the tool change signal is
output when the service life of the final tool in a group
expires. If the count-based service life count system
is selected, the tool change signal is output when the
tool service life count restart M code is specified, or
when the CNC is reset by M02 or M03 after the
service life of the final tool in a group expires.
3 The selection of a group based on a T code and tool
selection within the group are performed during
buffering. So if, during machining with a group
selected, a buffered block contains a T code
specifying the same group, the T code is buffered
even if the service life expires during machining. In
this case, the next tool is not selected. When the
time-based service life count system is used, and a T
code is specified to select the same group in
succession, insert an M code for suppressing
buffering immediately before the T code.

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