
8.CONTROL FUNCTION LASER FUNCTION B-64663EN/01
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8.9 REFLECTION BEAM MONITOR FUNCTION
Overview
When a highly reflective workpiece is laser-cut, the cutting face may
reflect the laser beam back to the laser resonator. Should this occur,
the cutting face and rear mirror form a false resonator, increasing the
laser power. The resultant laser beam may damage an optical
component.
To prevent such damage from occurring, the function monitors the
laser power. If the laser power exceeds a predetermined level, the
reflection beam is judged as returning to the resonator, and an alarm is
output.
Reflection beam monitoring
(1) If the laser power exceeds a specified value by a value greater
than or equal to the setting made with parameter No. 15265, an
alarm is raised.
(2) If the laser power is greater than or equal to the setting made with
parameter No. 15266, an alarm is raised.
Parameter
15265 Allowable output increase
[Data type] Word
[Unit of data] W
[Valid data range] 0 to 32767
If the difference between the specified value and the actual output is
greater than or equal to this value, an alarm is raised.
15266 Maximum output
[Data type] Word
[Unit of data] W
[Valid data range] 0 to 32767
If the actual output is greater than or equal to this value, an alarm is
raised.
Alarm and message
No. Message Contents
4168 Abnormal beam reflection The magnitude of the reflection beam
from the workpiece has reached a
predetermined level.