
5. AUTOMATIC OPERATION
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(4)Resume
Once rigid tapping retraction has been stopped, it can be resumed by
performing the same operation as that used for starting rigid tapping
retraction. If rigid tapping retraction has been completed, however,
the start operation does not restart rigid tapping retraction. If retract
value α is set in parameter No. 5382, however, the start operation
performs rigid tapping retraction using α only.
Rigid tapping retraction
start signal RTNT
M29 command
Spindle enable signal ENB
Rigid tapping signal RGTAP
M29 completion signal FIN
Spindle excitation
Retract movement
Rigid tapping retraction
completion signal RTPT
Fig. 5.11 Start and completion time chart
In the reset state, setting rigid tapping retraction start signal RTNT to “1”
in MDI mode causes the rigid tapping M command to be output. For rigid
tapping retraction, specify neither gear switching nor orientation. Spindle
function strobe signal SF is also output if no S command has been
specified after power–on.
Upon the completion of rigid tapping retraction, spindle enable signal
ENB is set to “0”, in the same way as at the end of ordinary rigid tapping.
Therefore, perform the sequence for canceling rigid tapping. Once rigid
tapping retraction has been completed, rigid tapping retraction
completion signal RTPT is set to “1” and the CNC enters the reset state.
Start and completion
time chart