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6. PRECAUTIONS TO BE TAKEN WHEN USING THE EQUIPMENT IN
WINTER OR AT A COLD REGION
If the temperature drops suddenly, cold protection and heat retention for the equipment will be neces-
sary. If no heating system is provided inside the plant, it will be necessary to maintain the circulation
operation and immediately add antifreeze solution to the equipment without turning OFF the cooling
system before stopping the equipment. (Industrial antifreeze solution, Anti-frozen N made by Clariant).
If you do not start the equipment for a long time, expel water from the laser and the respective water
tubes to keep them clean and to prevent suffering an unnecessary economic loss due to freezing.
Composition ratio of the antifreeze is 3:7 (3: Antifreeze; 7: Water). It should be remembered, howev-
er, the antifreeze and water must be combined not only according to the aforementioned ratio but also
taking the actual conditions of the site such as the temperature in consideration. From the results of in-
spection and measurement, we have reached the following conclusion. Refer the conclusion when you
purchase the laser equipment.
6:4(6: Antifreeze solution; 4: Water) 45 degrees below zero
5:5(5: Antifreeze solution; 5: Water) -35 degrees below zero
4:6(4: Antifreeze solution; 6: Water) 25 degrees below zero
3:7(3: Antifreeze solution; 7: Water) 15 degrees below zero
2:8(2: Antifreeze solution; 8: Water) 5 degrees below zero
The laser equipment employs the latest laser technologies. The laser equipment has strict requirements
for the working environment. When you use the laser equipment, take care of the installation environ-
ment of the laser equipment.
The CO2 laser cutter employs the water-cooled system for its cooling. This means that the liquid coag-
ulates to form a solid substance if the liquid temperature drops below zero. In such a case, the con-
nections of the tubes and seal portions of the cooling system will be likely to break, thereby inviting an
extremely high risk of breaking the laser equipment, QBH output head and cooling system. During a
cold winter, in particular, when the room temperature excessively drops, take additional care to take
appropriate anti-freezing and maintenance measures for the laser equipment.
1 When you want to stop the laser equipment for a short time, do not turn OFF the cooling system
but continuously run it to keep the equipment at a constant temperature. While the equipment is in
use, carry out inspection at the fixed time to prevent the equipment from stopping unexpectedly.
2 When you want to stop the laser equipment for a long time, expel water from the cooling system.
(If you do not have a preservative, the water may be stored in a clean tank.) In addition, blow out
water from inside the tube, pump, filter and heat exchanger with nitrogen gas. It is also necessary,
when the laser equipment made by ROFIN is used, to discharge deionized water from the laser
tube.
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