Siemens SINUMERIK 840Di sl Programming Manual page 178
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Motion commands
4.17 Tapping without compensating chuck (G331, G332)
If no speed programmed, gear stage is monitored
If no speed is programmed with G331, then the speed and gear stage last programmed will
be used to produce the thread.
In this case, monitoring is performed to check that the programmed speed is within the
speed range defined by the maximum and minimum speed thresholds for the active gear
stage. Otherwise, alarm 16748 is signaled.
N05 M40 S800
....
N55 SPOS=0
N60 G331 Z-10 K5
No gear-stage change can be performed, gear stage is monitored.
If the spindle speed is programmed in the G331 data record as well as the geometry, the
gear stage cannot be changed, as this would prevent the necessary path motion of the
spindle and infeed axis/axes from being achieved.
As in the example above, the speed and gear stage are monitored in the G331 data record.
Where necessary, alarm 16748 can be signaled.
N05 M40 S500
....
N55 SPOS=0
N60 G331 Z-10 K5 S800
178
;Gear stage 1 is selected, the
;first gear-stage data record is active.
;Spindle speed S800 with 2nd gear-stage data record is
;monitored. Gear stage 2 should be active;
;alarm 16748 is signaled
;Gear stage 1 is selected
;No gear-stage change possible,
;spindle speed S800 with 2nd gear-stage data record is
;monitored. Gear stage 2 should be active;
;alarm 16748 is signaled
Programming Manual, 11/2006, 6FC5398-1BP10-2BA0
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