
B-63783EN-1/01 5.AUTOMATIC OPERATION
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(3) When the mode is returned to automatic operation mode, and tool
return signal TRRTN is set to 1 and then back to 0, the CNC
returns the tool to the retraction position by tracing back along the
manual operation path.
This operation is referred to as return. When movement is started
with a return operation, TRMTN is set to 1.
Upon the completion of return to the retraction position, TRSPS is
set to 1.
utomatic operation mode
(MEM, D, T)
Tool return signal
(J, H, S)
Return operation
Tool withdrawal axis move in-progress
iTRMTN)
Tool return signal
(TRRTN)
Tool return completion signal
(TRSPS)
Fig. 5.10 (d) Timing Chart for Return (When the Tool Is Returned to the
Retraction Position without Single Block Stop or Feed Hold during
Return Operation)
(4) When the cycle start button is pressed while the tool is in the
retraction position, the tool first moves to the position at which
tool withdrawal signal TRESC was set to 1. This operation is
referred to as repositioning. Upon the completion of repositioning,
tool withdrawal mode in-progress signal TRACT is set to 0,
notifying the PMC that tool withdrawal mode has ended. The
operations performed after the completion of repositioning
depends on the automatic operation state existing when tool
withdrawal mode was set.
(1) When tool withdrawal mode is set during automatic
operation, automatic operation is resumed after the
completion of repositioning.
(2) When tool withdrawal mode is set with automatic operation
held or stopped, the original automatic operation hold or stop
state is set after the completion of repositioning. When the
cycle button is pressed again, automatic operation is
resumed.