30
Chapter 6 Common Fault Treatmentnt
Laser Troubleshooting Table
NO
Fault
phenomenon Check items
Troubleshooting steps
2
Laser
Weak
Working
current
confirmation
1. Check whether the power supply is stable and the
current reaches the rated working current.
Optical
mirror
confirmation
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.
3. Check whether other optical lenses are contaminated,
such as red beam combiner, galvanometer and field
lens.
Service life
confirmation
4. The power is attenuated after the laser is used for
20,000 hours, which is normal power loss.
Signal
interference
5. There is a disconnection during the marking process,
usually due to signal interference. For this reason, the
weak and strong current leads cannot be tied together or
on the same side. The signal line uses a signal line with
a shielding function; Good contact.
Marking
interface
parameter
confirmation
6. Check whether the pulse width frequency has been
set within the required range.
Optical path
detection
7. Confirm whether the light spot of the isolator is normal
(the light spot is round and there is no dark spot).
8. Check whether the output light of the laser is blocked
(make sure that the output end of the isolator and the
galvanometer port are on the same horizontal line during
installation).
3 Laser light
is unstable
Power
supply
1. Check whether the power supply is stable and the
current reaches the rated working current.
Signal
interference
2. 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
walked on the same side. The signal line uses a shielded
signal line; Good contact.
3. Check whether the 25-pin signal cable is an anti-
interference cable, and the port is in good contact.
Laser
temperature
4. Whether the temperature of the laser case is too high,
and the temperature is close to the critical temperature
(reference ambient temperature 45 ~ 47
℃
) will appear
light unstable.
5. If the temperature of the isolator housing is too
high, the light will be unstable when the temperature
is close to the critical temperature (reference ambient
temperature 45 ~ 47
℃
).
