Siemens SINUMERIK 840DE sl Commissioning Manual page 552

Technologies and cycles
21.5 Turning
21.5.5 Setting up the counterspindle under ShopTurn
The position to which the counterspindle travels when the program starts is defined in the
following channel-specific cycle setting data:
SD55232 $SCS_SUB_SPINDLE_REL_POS
The following channel-specific setting data becomes effective when traveling to the fixed stop:
SD55550 $SCS_TURN_FIXED_STOP_DIST
SD55551 $SCS_TURN_FIXED_STOP_FEED
SD55552 $SCS_TURN_FIXED_STOP_FORCE
Between traveling to the fixed stop and gripping, the counterspindle can retract a short distance
to counteract compressive stress in the workpiece.
SD55553 $SCS_TURN_FIXED_STOP_RETRACTION
After gripping you can cut off the workpiece. Before doing so, the counterspindle can retract
a short distance with the workpiece to exert tensile stress on the workpiece. This relieves
pressure on the tool when cutting off.
SD55543 $SCS_TURN_PART_OFF_RETRACTION
After cut-off, you can carry out a cut-off check and for turning, use the "Travel to fixed stop"
function. You can activate/deactivate the cut-off check using the channel-specific cycle setting
data:
SD55540 $SCS_TURN_PART_OFF_CTRL_DIST
SD55541 $SCS_TURN_PART_OFF_CTRL_FEED
SD55542 $SCS_TURN_PART_OFF_CTRL_FORCE
The cut-off is successful when travel to fixed stop fails. The following alarms are output:
Alarm
20091
20094
You can switch off the alarm display using the following machine data:
MD37050 $MA_FIXED_STOP_ALARM_MASK
= 2
You can set this machine data axis-specifically in the "Machine Data" window in the "Tool zero"
operating area.
538
Software option
You require the following software option in order to use the counterspindle on your
machine:
"Generic coupling 'CP-STATIC'" or higher
Alarm text
Axis %1 has not reached the fixed stop.
Axis %1 end stop has been aborted.
Suppressing alarms 20091 and 20094.
Retraction position Z for counterspindle
Distance for travel to fixed stop.
Feedrate for travel to fixed stop.
Force for travel to fixed stop in %.
Retraction distance before clamping af‐
ter fixed stop.
Retraction distance before cut-off.
Distance for cut-off check.
Feedrate for cut-off check.
Force for cut-off check in %.
Enabling the fixed stop alarms.
Commissioning Manual, 12/2017, 6FC5397-1DP40-6BA1
SINUMERIK Operate (IM9)