Siemens SINUMERIK 840D sl Function Manual page 1662

Detailed Description
2.3 Configurable gear adaptation
2.3.4 Gear step change with oscillation mode
What is oscillation?
Oscillation in this context means that the spindle motor rotates alternately in the clockwise
and counterclockwise directions. This oscillation movement makes it easy to engage a new
gear step.
Oscillation mode
NC/PLC IS:
DB31, ... DBX82.3 (Change gear)
displays that a gear step change is required.
In principle, the new gear step can also be engaged without oscillation
1. Machine data:
2. NC/PLC IS:
3. The acceleration is determined in the following machine data:
DB31, ... DBX18.5 (oscillation speed)
The spindle is in oscillation mode if a new gear step was defined using automatic gear step
selection (M40) or M41 to M45 (DB31, ... DBX82.3 (Change gear) is set).
NC/PLC IS:
DB31, ... DBX82.3 (Change gear)
is only enabled when a new gear step is defined
that is not the same as the current actual gear step.
If NC/PLC IS:
DB31, ... DBX18.5 (Oscillation speed)
is simply set by the PLC without a new gear step being defined by the NC,
the spindle does not change to oscillation mode.
Oscillation mode is activated with NC/PLC IS:
DB31, ... DBX18.5 (Oscillation speed).
Depending on NC/PLC IS:
DB31, ... DBX18.4 (Oscillation via PLC)
while the function is in operation, a distinction is made between:
• Oscillation via NCK
• Oscillation via PLC
• Oscillation with FC 18
Literature:
/FB1/ Function Manual, Basic Function; PLC Basic Program (P3)
52
MD35010 $MA_GEAR_STEP_CHANGE_ENABLE
must be set to 1.
DB31, ... DBX84.6 (oscillation mode)
is set.
MD35410 $MA_SPIND_OSCILL_ACCEL
Basic logic functions: Spindles (S1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0