maintenance/
troubleshooting
411
Synrad
Series 48Series 48
Series 48Series 48
Series 48 operator’s manual
Troubleshooting
Possible Causes:
■ Verify that your UC-2000 or equivalent PWM controller is delivering tickle pulses of the proper
duration. See Controlling laser power in the “Technical Reference” section for tickle pulse details.
Beam delivery optics
Symptom:
■ The laser appears to slowly lose power over time; laser output power must be increased to maintain
previous performance.
Possible Causes:
■ Beam delivery optics are coated by vapor residue or debris.
Danger
serious
personal
injury
Ensure that DC power to the laser is turned off and locked out
before inspecting optical components in the beam path. Invisible
CO
2
laser radiation is emitted through the lens. Corneal damage or
blindness may result from exposure to laser radiation.
Shut down the laser and carefully inspect each optic in the beam delivery path, including the laser’s
output coupler. Remember that optics are fragile and must be handled carefully; preferably by the
mounting ring only. If the optic requires cleaning, then refer back to Maintenance for cleaning instruc-
tions. Use only recommended cleaning materials (see Table 4-1) to prevent scratching delicate optical
surfaces.
If the focusing optic is pitted, it must be replaced immediately. The laser’s high power density will cause
pits or debris on the lens to absorb enough energy that the lens may crack. If this happens, other optics in
the beam path may be contaminated or damaged as well.
When the application requires air (instead of nitrogen or argon) as an assist gas, we recommend the use
of breathing quality air available in cylinders from a welding supply company. Because compressed shop
air contains minute particles of oil and other contaminants that will damage optical surfaces, it must be
carefully filtered and dried before use as a purge or assist gas. Refer to Table 3-1, Gas purity specifications,
in the “Technical Reference” section for filtering/drying specifications.
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