Siemens Sinumerik 840D sl Programming Manual page 237
Fundamentals
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Also See for Sinumerik 840D sl:
- Function manual (2184 pages) ,
- Programming manual (1334 pages) ,
- Commissioning manual (1102 pages)
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Program code
...
N50 G331 S800
N55 SPOS=0
N60 G331 Z-10 K5
Example 4: No speed programming → monitoring of the gear stage
If no speed is programmed when using the second gear-stage data block with G331, then the
last speed programmed will be used to produce the thread. The gear stage does not change.
However, monitoring is performed in this case to check that the last speed programmed is
within the preset speed range (defined by the maximum and minimum speed thresholds) for
the active gear stage. If it is not, alarm 16748 is signaled.
Program code
N05 M40 S800
...
N55 SPOS=0
N60 G331 Z-10 K5
Example 5: Gear stage cannot be changed → monitoring of gear stage
If the spindle speed is programmed in addition to the geometry in the G331 block when using
the second gear-stage data block, if the speed is not within the preset speed range (defined
by the maximum and minimum speed thresholds) of the active gear stage, it will not be possible
to change gear stages, because the path motion of the spindle and the infeed axis (axes) would
not be retained.
As in the example above, the speed and gear stage are monitored in the G331 block and alarm
16748 is signaled if necessary.
Program code
N05 M40 S500
...
N55 SPOS=0
N60 G331 Z-10 K5 S800
Example 6: Programming without SPOS
Program code
N05 M40 S500
Fundamentals
Programming Manual, 01/2015, 6FC5398-1BP40-5BA2
Comment
; Master spindle with 2nd gear-stage data block: Gear stage 2
is selected.
; Align spindle.
; Tapping, spindle acceleration from second gear-stage data
block.
Comment
; Gear stage 1 is selected, the first gear-stage data block
is active.
; Monitoring of spindle speed 800 rpm with gear-stage data
block 2: Gear stage 2 should be active, alarm 16748 is sig-
naled.
Comment
; Gear stage 1 is selected.
; Gear stage cannot be changed, monitoring of spindle
speed 800 rpm with gear-stage data block 2: Gear stage
2 should be active, alarm 16748 is signaled.
Comment
; Gear stage 1 is selected.
Motion commands
10.11 Tapping
237
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