FANUC Series 16/18/160/180-Model C Machining Center Operators Manual

PROGRAMMING
B–62764EN/01
21. AXIS CONTROL FUNCTIONS
463
When the TOOL WITHDRAW switch on the machine operators panel
is turned on during automatic operation or in the automatic operation stop
or hold state, the tool is retracted the length of the programmed retraction
distance. This operation is called retraction. The position at which
retraction is completed is called the retraction position. Upon completion
of retraction, the RETRACT POSITION LED on the machine operators
panel goes on.
When the TOOL WITHDRAW switch is turned on during execution of
a block in automatic operation, execution of the block is interrupted
immediately and the tool is retracted. After retraction is completed, the
system enters the automatic operation hold state.
If the retraction distance and direction are not programmed, retraction is
not performed. In this state, the tool can be withdrawn and returned.
When the TOOL WITHDRAW switch is turned on in the automatic
operation stop or hold state, the tool is retracted, then the automatic
operation stop or hold state is entered again.
When the TOOL WITHDRAW switch is turned on, the tool withdraw
mode is set. When the tool withdraw mode is set, the TOOL BEING
WITHDRAWN LED on the machine operators panel goes on.
When the manual mode is set, the tool can be moved manually (Manual
continuous feed or manual handle feed) to replace the tool or measure a
machined workpiece. This operation is called a withdrawal. The tool
withdrawal path is automatically memorized by the CNC.
When the mode is returned to automatic operation mode and the TOOL
RETURN switch on the machine operators panel is turned off, the CNC
automatically moves the tool to the retraction position by tracing the
manually–moved tool path backwards. This operation is called a return.
Upon completion of a return to the retraction position, the
RETRACTIONS POSITION LED comes on.
When the cycle start button is pressed while the tool is in the retraction
position, the tool moves to the position where the TOOL WITHDRAW
switch was turned on. This operation is called repositioning. Upon
completion of repositioning, the TOOL BEING WITHDRAWN LED is
turned off, indicating that the tool withdrawal mode has terminated.
Operation after completion of repositioning depends on the automatic
operation state when the tool withdrawal mode is set.
(1) When the tool withdrawal mode is set during automatic operation,
operation is resumed after completion of repositioning.
(2) When the tool withdrawal mode is set when automatic operation is
held or stopped, the original automatic operation hold or stop state is
set after completion of repositioning. When the cycle start button is
pressed again, automatic operation is resumed.
Explanations
D Retraction
D Withdrawal
D Return
D Repositioning

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