
B–63173EN–1/01
5. AUTOMATIC OPERATION
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When 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, only drawn out of the tapping cycle is executed,
based on the stored information. The tap is pulled toward the R point.
Initial point
R point
Z point
Center of
tapping
Retract
completion
point
(1)Start
Reset the CNC, then select MDI mode. Setting tapping retraction start
signal RTNT to “1” starts tapping retraction.
(2)Completion
Upon the completion of tapping retraction, tapping retraction
completion signal RTPT is set to “1”, with which the CNC
automatically enters the reset state. Setting tapping retract start signal
RTNT to “0” sets tapping retraction completion signal RTPT to “0”.
(3)Stop
During tapping retraction, setting tapping retraction start signal RTNT
to “0” stops tapping retraction, placing the CNC in the reset state. To
resume tapping retraction, set tapping retraction start signal RTNT to
“1”. tapping retraction can also be stopped by means of a reset or feed
hold.
(4)Resume
Once tapping retraction has been stopped, it can be resumed by
performing the same operation as that used for starting tapping
retraction. If tapping retraction has been completed, however, the start
operation does not restart tapping retraction.
5.9
RETRACTION FOR
TAPPING
General
Basic procedure