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Aperture Replacement
Coolant Line Purge
Desiccant Replacement
© 2019 Cutting Edge Optronics
1. Turn the laser current down below threshold.
2. Install the aperture assembly in Figure 2-1 to the laser bench with the (2) 8-32
fasteners and locking hardware. Center the mount to the screw locations. To
allow adjustment, do not tighten the fasteners.
3. Increase the current to just above threshold.
4. Adjust the mount side to side to achieve bulleye.
5. While holding the tab of the aperture holder, loosen the 4-40 screws to allow
vertical adjustment of the aperture.
6. Adjust the aperture holder up and down to achieve bullseye.
7. Increase the current to the full power level. Repeat steps 4-6 with minor
adjustments to achieve maximum power.
8. Torque 8-32 screws to 25 in-lbs. Torque 4-40 screws to 5.5 in-lbs.
NOTE:
Typical aperture size is 1.2 mm. If the insertion loss (decrease of output power)
of the aperture is not approximately 1 Watt, then the aperture size should be changed.
To increase the insertion loss (decrease output power), install a 1.1 mm aperture. To
decrease the insertion loss (increase output power), install a 1.3 mm aperture. Contact
NG technical service for replacement apertures.
1. Turn off the drive electronics and chiller.
2. Disconnect the coolant lines with the quick disconnects.
3. Connect a dry nitrogen (or oil free dry clean air line).
4. Connect a hose with proper quick disconnect fitting to the outlet port to drain
the coolant.
5. Turn on the air slowly to purge the coolant.
6. Run the air at 3-5 psi through the system for at least ½ hour.
7. Turn off the air and remove the hoses.
1. Blow off debris outside of laser housing using nitrogen or dry Class 0 air.
2. Wipe the housing clean using TechniCloth III™ wipes and isopropyl alcohol.
Chapter 3: Tuning and Testing Procedures
14
Patara II and Iklwa II Service Manual
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