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FANUC Series 30i/31i/32i−MODEL A
Tool Life Management
Specifications
Sep.10.’04
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NOTE
1 When a tool is selected, tools are searched starting from the current
tool toward the last tool to find a tool whose life has not expired.
When the last tool is reached during this search, the search restarts
from the first tool. When it has been determined that there are no
tools whose life has not expired, the last tool is selected.
When the tool currently used is changed by the tool skip signal, the
next new tool is selected using the method described here.
2 When tool life counting indicates that the life of the last tool in a
group has expired, the tool change signal is output. If the life count
type is the duration specification type, the signal is output as soon as
the life of the last tool in the group has expired. If the life count type
is the use count specification type, the signal is output when the CNC
is reset by a command such as M02 or M30 or when the tool life
count restart M code is specified after the life of the last tool in the
group has expired
3 When a T command is specified, a group and a tool in the group are
selected while the T command is buffered. This means that when a
block to be buffered contains a T command specifying a group while
machining is being performed with that group selected, then even if
the tool life expires during machining, the next T command is already
buffered, so the next tool is not selected. To prevent this, if the life
count type is the duration specification type, then when a T command
is to be specified to select the same group successively, insert an M
code for suppressing buffering to a place immediately before the T
command.
4 When the tool life is counted, the remaining life of a group (the life
value minus the life counter value) is compared with the remaining
life setting, and the tool life arrival notice signal status is changed
according to the result of the comparison.