Siemens SINUMERIK 840D sl Function Manual page 481

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
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
number number
Block CLC: Orientation changed with TRAFOOF"
number number
Block CLC(0) with active TRC."
TE1: Clearance control
11.6 Programming
481