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Chapter 6 Common Fault Treatment
Laser Troubleshooting Table
NO
Fault
phenomenon
Check items Troubleshooting steps
4 Low power
Working current
conrmation
1. Check whether the power supply is stable and
the current reaches the rated working current.
Optical mirror
conrmation
2. Check whether the output mirror surface of the
collimator is contaminated. If it is contaminated,
wipe it gently with absolute ethanol in front of it,
taking care not to scratch the mirror coating.
3. Check whether other optical lenses are
contaminated, such as red beam combiner,
galvanometer and eld lens.
Isolator
4. Check whether the output light of the laser
is blocked (the output end of the isolator and
the galvanometer port should be on the same
horizontal line during installation).
5. Check whether the light spot of the isolator is
normal (the light spot is round and there is no dark
spot).
Service life
conrmation
6. It is normal power loss for the laser to lose
power after 20,000 hours of use.
Signal
interference
7. There is a disconnection during the marking
process, usually due to signal interference. For this
reason, the weak and strong current leads cannot
be bundled or walk on the same side. The signal
line uses a signal line with a shielding function;
Good contact.
Armor cable
bending
8. Check whether the bending of the armor cable is
too small.
Marking
interface
parameter
conrmation
9. Check whether the pulse width frequency has
been set within the required range (only for MOPA
series).
5
Laser is not
powered
Power
confirmation
1. Check whether the power supply wiring of
the laser is correct, whether + 24V and GND
are reversed, and whether the ground wire is
grounded.
2. Check whether the power cord is in good
contact.
6
Abnormal
light spot
of isolator
Isolator spot
confirmation
1. Conrm whether the output light spot of the
isolator is normal (the light spot is round and there
is no dark spot).
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