Siemens SINUMERIK 840D sl Function Manual page 1621

DB31, ... DBX61.5 (position controller active)
Position control is particularly suitable if the position of the spindle needs to be tracked over
a longer period or if synchronous spindle setpoint value linkage is to be activated.
• Position control mode is activated in the part program with SPCON (spindle number).
• NC/PLC IS:
• Acceleration in position control mode is defined independent of the gear step in machine
Independent spindle reset
Machine data:
MD35040 $MA_SPIND_ACTIVE_AFTER_RESET (Independent spindle reset)
defines how the spindle behaves after a reset or program end (M2, M30):
• MD35040 $MA_SPIND_ACTIVE_AFTER_RESET is reset.
• MD35040 $MA_SPIND_ACTIVE_AFTER_RESET is set.
If prior to a reset or end of program the constant cutting speed (G96, G961) is active, the
current spindle speed (in relation to 100% spindle override) is applied internally as the last
programmed spindle speed.
The spindle can only be stopped with NC/PLC IS:
DB31, ... DBX2.2
(Delete distancetogo/Spindle reset).
The direction of rotation is deleted in the event of all alarms generating a spindle quick stop.
The last programmed spindle speed (S value) is retained.
Once the source of the alarm has been eliminated, the spindle must be restarted.
Basic logic functions: Spindles (S1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
DB31, ... DBX61.5 (Position controller active)
is set.
data:
MD35210 $MA_GEAR_STEP_POSCTRL_ACCEL
.
When the spindle is reset or at the end of the program, the spindle immediately
decelerates to a stop at the active acceleration rate. The last programmed spindle speed
and direction of rotation are deleted.
On a reset or at the end of the program, the last programmed spindle speed (S value) and
the last programmed direction of spindle rotation (M3, M4, M5) are retained.
The spindle is not decelerated.
Detailed Description
2.1 Spindle modes
11