
PROGRAMMING
B–61404E/08
10. TOOL FUNCTION (T FUNCTION)
114
The life of a tool is specified by a usage frequency (count) or usage time
(in minutes).
The usage count is incremented by 1 for each tool used in a program. In
other words, the usage count is incremented by 1 only when the first tool
group number and tool change command are specified after the CNC unit
enters the automatic operation state from the reset state.
CAUTION
Even if the same tool group number is specified more than
once in a program, the usage count is only incremented by
1 and no new tools are selected.
When a tool change is specified (M06), tool life management is started
for the tools specified by the tool group number. In tool life management,
the time during which a tool is used in the cutting mode is counted in four
second increments., If the tool group is changed before the incremental
time of four seconds elapses, the time is not counted. The time a tool is
used for single block stop, feed hold, rapid traverse, dwell, machine lock,
and interlock is not counted.
NOTE
1 When a tool is selected from available tools, tools are
searched starting from the current tool towards the lasttool
to find a tool whose life has not expired.
2 When tool life counting indicates that the life of the last tool
in a group has expired, the tool change signal is output.
When tool life is managed by time, the signal is output when
the life of the last tool in the group has expired. When tool
life is managed by usage frequency (count), the signal is
output when the CNC unit is reset or the tool life count
restart M code is specified.
10.2.4
Tool Life
Explanations
D Usage count
D Usage time