Edrive Operation - NORTHROP GRUMMAN Patara I User Manual

eDrive Operation

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laser to a clean room environment and remove the cover. Inspect all optics
including the diode module rod.
 Internal optical damage to the laser, contaminated rod, or aging diodes:
If the laser power cannot be restored after optimization, contact NG for
service.
The following issues may occur in relation to the Patara laser.
CW Power Only, No Optical Pulsing
Perform initial check on system. CW power only or absent optical pulsing is
typically caused by the wrong settings or an eDrive problem. Check setting
procedures or refer to the eDrive Operation section in Chapter 7:
Troubleshooting for procedures and details.
Hold Off Failure
Perform initial check on system. This problem can be Q-switch low power fault
on the eDrive. Refer to the eDrive Operation section in Chapter 7:
Troubleshooting for procedures and details.
Hold off failure can be caused by a failing Q-switch. This requires the internal
laser be repaired.
Occasionally, a re-tuned laser can suffer from hold off loss. To remedy, change
the angle of the QSW. Since QSW angle cannot be adjusted outside the laser,
internal service will be required.
The eDrive has built-in diagnostics to alert the user of fault conditions. Common
error reports and suggested remedies follow. Consult the eDrive User Manual for
more details.
Laser Water Fault Detected
Check chiller for operation and low water level.
Hardware Fault Detected
 Check that the Emergency Stop button is not depressed.
 Check INTERLOCK input on back panel for open condition.
Cover Interlock Fault Detected
 Verify that the cover is secure on the laser.
 Check cable connections to laser.
Chapter Seven: Troubleshooting
55 Patara I and II Laser User Manual