
B–63523EN–1/03
5. AUTOMATIC OPERATION
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The tool can be retracted from a workpiece to replace the tool, if damaged
during machining, or to check the status of machining. Then, the tool can
be returned to restart machining efficiently.
X
Y
Z
:Position in which the tool escape signal is turned to “1”.
:Position to which the tool is retracted by manual operation.
:Programmed escape position
:Retraction
:Manual operation
:Return operation
:Re-positioning
Fig. 5.8 Path of tool retraction and return for M series
D When tool retraction signal TRESC input from the PMC turned to “1”
while automatic operation is started, stopped, or held , the tool is
retracted by the distance specified in the program. The position to
which the tool retracts is called the retraction position. When TRESC
turned to “1” while automatic operation is started, if a block is being
executed, the tool is retracted after the block is suspended. When
retraction ends, the machine enters the automatic operation hold state.
The clearance and direction can be specified by the program. If these
values are not specified by the program, the tool is not retracted.
When TRESC turns to “1”, the machine enters the tool retraction
mode, and tool retraction mode signal TRACT turns to “1” to notify
the PMC that the machine has entered the tool retraction mode.
5.8
TOOL RETRACTION
AND RETURN
General
Basic procedure for tool
retraction and return