Error Message: |
HEAD: Light level too low for Beam Pointing |
Applies to: |
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Service Information: |
Normally means that the laser is not really on so check laser setpoint and media selection. Due to a firmware bug in thermal head firmware versions prior to 1.56 this error message could also occur if light level on one of the sensors is too high. This can be very confusing if the laser is clearly on yet the error message says light level to low. This situation can easy happen if the beam pointing rod current is completely wrong. To recover from this situation enter "laser current 20", "head bp on" and wait for several minutes. After this the rod current should be properly set and you should now be able to issue "laser on" successfully. If you have thermal head version 1.56 it is easily possible to diagnose the exact problem by using the internal data collection capabilities (see release notes or head diag0 information). Also with 1.56 the command "laser test" may diagnose the problem. Note that due to a programming error, this error has been defined for both the green and thermal heads. Thermal: Light level too low for Beam Pointing The error indicates that beam-pointing is on but the laser is off ( or having serious problems ). There is insufficient signal level for the beam-pointing ( for twenty iterations the sum of the beam-pointing sensors was less than fifty ). The Thermal Head Troubleshooting document includes a beam-pointing test. The test turns on the laser and the beam-pointing and verifies operation of the beam-pointing by moving the laser from one side to the other while monitoring the beam-pointing sensor readings. Green: actuators initialized ok The exposure head has successfully finished initialization. This is not an error message. |
Operator Action: |
Thermal: The Thermal Head Troubleshooting document includes a beam-pointing test. Green: This message does not indicate an error. It can be safely ignore. |
Cause:
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See Also: |
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Go to CTP Firmware Error Index Page
Go to CTP Firmware Error Search Page