Siemens SINUMERIK 840D sl Function Manual page 582

TE1: Clearance control - 840D sl only
15.6 Programming
Block change with exact stop
If exact stop is active at the end of the block (G60/G09 with G601/G602) the block change
may be delayed due to axis movements induced by the clearance control sensor signal.
Sensor collision monitoring
A digital input for an additional collision signal can be configured by the sensor using the
following machine data:
MD62504 $MC_CLC_SENSOR_TOUCHED_INPUT (assignment of the input signal for the
"sensor collision" signal)
This collision monitor can be activated and deactivated block-synchronously through alternate
programming of CLC(1)/CLC(2).
As a reaction to the sensor collision signal, the clearance control moves, irrespective of the
feedrate override setting, at maximum velocity in the plus direction until it reaches the currently
valid upper limit. The path motion is stopped simultaneously.
NC-START can be used to resume processing.
3D clearance control and 5-axis transformation
If 3D clearance control is activated before the 5-axis transformation required for clearance
control in the direction of the tool orientation has been activated, the clearance control function
will be dependent on the active working plane (G17/G18/G19):
● G17: Direction of clearance control = Z
● G18: Direction of clearance control = Y
● G19: Direction of clearance control = X
Activation of 5-axis transformation
When 5-axis transformation is activated, the tool orientation specified by means of the rotary
axis positions must tally with the control direction specified by the active working plane on
activation of clearance control.
If the tool orientation of the 5-axis transformation and the control direction of the clearance
control function do not tally, the following CLC alarm will appear:
● Alarm "75016 Channel
Deactivation of 5-axis transformation
If 5-axis transformation is deactivated when clearance control is active, the last control direction
before 5-axis transformation was deactivated is retained.
Tool radius compensation
3D clearance control can only be deactivated if no tool radius compensation is active in the
channel at the time of deactivation (G40). If tool radius compensation is active (G41/G42), the
following alarm appears:
● Alarm "75015 Channel
582
number Block number CLC: Orientation changed with TRAFOOF"
number Block number CLC(0) with active TRC."
Function Manual, 01/2015, 6FC5397-2BP40-5BA2
Special functions