
B–64113EN–1/01
5. AUTOMATIC OPERATION
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When rigid tapping is stopped, either as a result of an emergency stop or
a reset, the tap may cut into the workpiece. The tap can subsequently be
drawn out by using a PMC signal. This function automatically stores
information relating to the tapping executed most recently. When a tap
retraction signal is input, the tap is removed from the hole, based on the
stored information. The tap is pulled toward the R point. When a retract
value α is set in parameter No. 5382, the retraction distance can be
increased by α.
Initial point
R point
Z point (α=0)
L
Center of
tapping
Retract
completion
point
L
α
α
(when α is set)
2nd return
completion
point
1st return
completion
point
(1)Start
Reset the CNC, then select MDI mode. Setting rigid tapping retraction
start signal RTNT to “1” starts rigid tapping retraction.
(2)Completion
Upon the completion of rigid tapping retraction, rigid tapping
retraction completion signal RTPT is set to “1”, with which the CNC
automatically enters the reset state. Setting rigid tapping retract start
signal RTNT to “0” sets rigid tapping retraction completion signal
RTPT to “0”.
(3)Stop
During rigid tapping retraction, setting rigid tapping retraction start
signal RTNT to “0” stops rigid tapping retraction, placing the CNC in
the reset state. To resume rigid tapping retraction, set rigid tapping
retraction start signal RTNT to “1”. Rigid tapping retraction can also
be stopped by means of a reset or feed hold.
5.11
RETRACTION FOR
RIGID TAPPING
(M SERIES)
General
Basic procedure