Siemens SINUMERIK 840Di Function Manual page 1525

Phase 4:
The spindle is stationary and has reached the end point. Position control is active and holds
the spindle in the programmed position.
NC/PLC IS:
DB31, ... DBX60.6 (position reached with exact stop coarse)
and
DB31, ... DBX60.7 (position reached with exact stop fine)
are set if the distance between the spindle actual position and the programmed position
(spindle setpoint position) is less than the settings for the exact stop fine and coarse limits.
This is defined in machine data:
MD36010 $MA_STOP_LIMIT_FINE
and
MD36000 $MA_STOP_LIMIT_COARSE.
Aborting the positioning process
The positioning action can only be aborted with NC/PLC IS:
DB31, ... DBX2.2 (delete distance-to-go/Spindle reset).
The positioning action is aborted with each reset (Operator panel front reset/NC/PLC IS
DB31, ... DBX2.2 (delete distance-to-go/Spindle reset)),
independent of machine data:
MD35040 $MA_SPIND_ACTIVE_AFTER_RESET (individual spindle reset).
Special points to be noted
• The accelerations are defined in the following machine data:
• The spindle override switch is active.
• The positioning action (SPOS, M19 and SPOSA) is canceled with each reset.
• The positioning action is canceled with NC STOP.
• The positioning velocity can also be programmed with FA[Sn].
2.1.5 Axis mode
Why axis mode?
For certain machining tasks (e.g., on turning machines with end-face machining), the spindle
not only has to be rotated with M3, M4 and M5 and positioned with SPOS, M19 and SPOSA, but
also addressed as an axis with its own identifier (e.g., C).
Spindles (S1)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
– MD35210 $MA_GEAR_STEP_POSCTRL_ACCEL
(acceleration in position control mode)
– MD35200 $MA_GEAR_STEP_SPEEDCTRL_ACCEL
(acceleration in speed control mode)
Detailed Description
2.1 Spindle modes
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