Check the following:-
- That the cooler is receiving mains power.
- The coolers fuses using a meter (see cooler
manual)
- The cooler is full of water
- That the pump is running
- That the water temperature is 20 Deg C (nominal)
- That the water is circulating around the
laser
- The cooler is pumping sufficient water to
trip the
flow switch in the case of a Coherent laser
system
- That the compressor is running when required
and
that it lowers the water temperature when it
does.
- That the cooler is not at a temperature less
than 20 Deg C
- That the cooler pipes are not crushed preventing
water flow
- That the shutter is open with the lid closed
- Has the laser tube overheated?
Most laser tubes have an internal thermal protection
trip circuit to protect them from overheating.
If this trip is activated because the tube has
overheated, it usually requires the cutter /
laser to be powered off and then on again to
reset the trip circuit.
If an air-cooled laser system overheats check
out the ambient air temperature and also the
cooling fans or ducts to see that they are not
blocked with dust or lint and that the airflow
is sufficient. In the case of fluid cooled systems
check out the cooler, (a cooler manual is provided
with the cutter)
- Is the shutter mechanism working?
Remove the cover from the laser side of the
cutter (LH) being careful not to disturb the
primary mirror and check that the shutter is
fully open when the cover is closed. This is
also a good opportunity to check that the micro
switch interlock is closed with the lid shut
and oil the mechanism if need be.
- Is the laser power supply working?
On most models there are green LEDs on the
outside of the mains control box, these lamps
indicate control system power and laser DC power.
You can also check the status LEDs on the laser
tube itself that indicate the tube is receiving
power. Some laser tubes carry an onboard fuse,
which may also be checked.
- Have the Mirrors been fitted correctly?
Check that all mirrors are fitted with their
reflective surface facing the beam. A mirror
fitted backwards will not reflect laser energy.
The gold side of the mirror is the reflective
side.
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FB Series Troubleshooting