8
4) The welding operation shouldn’t be done in the dust or environment containing corrosive gas.
5) The welding operation shouldn’t be done in the environment of strong airflow.
2.
2.
Safety
Safety
keys
keys
The welding machines can automatically stop work when the setting standards, like the electric network voltage,
the output current and built-in temperature are exceeded because of the protection circuits of over-voltage,
over-current and over-heat. But the welding machine can be also damaged when it is over-uses( e.g. over voltage),
therefore the following matters should be noticed:
1) Assure good ventilation!
The welding machine is small welding machine. The natural ventilation can’t satisfy the machine’s cooling
demands once a larger current passes through it when it works. Therefore a fan is mounted inside the machine
for cooling the machine and making it run stably. The user should ensure the ventilated place isn’t covered
and stemmed. The distance between welding machine and the surrounding objects is at least 0.3m. The good
ventilation very important for the machine to work better and use longer.
2)
2) Over-load is prohibited!
The users should remember to observe the maximum permission load current (should be corresponding with
selected load endurance ratio) and keep it not exceeding the maximum permission load current.
Over-current would shorten the machine’s life and even burn-out the machine.
3) Over-voltage is prohibited!
The power voltage is listed in the table of “main performance parameters”. The welding current keeps in the
allowable range because of the machine’s voltage autocompensation circuit in common case. The users ought
to know the welding machine may be damaged if the power voltage exceeds allowable value and take
corresponding precautionary measures.
4) The back of every welding machine is attached a grounding screw marking a sign of grounding. A cable with
section of at least 6mm
2
is used for grounding to release static electricity and prevents the accidents caused
by electricity leakage.
5) The welding machine should suddenly enter protection state and stop working if the load endurance ratio is
exceeded. This indicates standard load endurance ratio is already exceeded and over heat triggers temperature
controlling switch. Therefore the machine stops working and the yellow indicator lamp lights at the same
time. The power plug needn’t be pulled out cause the cooling fan can continuously runs and cools the
welding machine. The welding process can be continued when the red indicator lamp extinguishes and the
temperature falls into the standard range.
Possible problems in welding:
The status listed below may be related with fitting parts, gas, environment and power supply. Please try to
improve the condition and avoid the following circumstances appears.
A.
Welded
Welded
dots
dots
become
become
black
black
:
:
It shows that the welded dots are not protected effectively and oxidized. You can check:
1. Make sure the valve of the argon gas bottle is open and have enough pressure which is generally not lower than
0.5MPa, or else, the bottle should be refilled.
2. Make sure that the flow of argon gas is enough. You can choose different flow in terms of various welding
current, but too little flow may lead to protected gas’s stiffness is inadequate and can’t cover all the welded dots.
We propose that the flow of argon gas can’t be smaller than 3l/min no matter how small the current is.
3. The simplest way to check whether there is gas being sent out is putting your hand near the nozzle to check