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2. Safety norms
The welding machine is installed with protection circuit of over voltage, over current and over
heat. When voltage, output current and temperature of machine exceed the required standard,
welding machine will stop working automatically. However, overuse (such as over voltage) will still
result in damage to the welding machine. To avoid this, the user must pay attention to the following.
1) The working area is adequately ventilated!
The welding machine is powerful machine, when it is being operated, it generated by high currents,
and natural wind will not satisfy machine cool demands. So there is a fan in inner-machine to cool
down machine. Make sure the intake is not in block or covered, it is 0.3 meter from welding machine
to objects of environment. User should make sure the working area is adequately ventilated. It is
important for the performance and the longevity of the machine.
2) Do not over load!
The operator should remember to watch the max duty current (Response to the selected duty
cycle). Keep welding current is not exceed max duty cycle current. Over-load current will damage
and burn up machine.
3) No over voltage!
Power voltage can be found in diagram of main technical data. Automatic compensation circuit
of voltage will assure that welding current keeps in allowable range. If power voltage is exceeding
allowable range limited, it will damage to components of machine. The operator should understand
this situation and take preventive measures.
4) There is a grounding screw behind welding machine, with a grounding marker on it. Before
operation, welding crust must be grounded reliable with cable which section is over 6 square
millimeters, in order to prevent from static electricity, and accidents because of electricity leaking.
5) If welding time is exceeded duty cycle limited, welding machine will stop working for protection.
Because machine is overheated, temperature control switch is on "ON'' position and the indicator
light is red. In this situation, you don't have to pull the plug, in order to let the fan cool the machine.
When the indicator light is off, and the temperature goes down to the standard range, it can weld
again.
2. Machine description
The welding machine is a rectifier adopting the most advanced inverter technology.
The development of inverter gas-shielded welding equipment benefits from the development
of the inverter power supply theory and components. Inverter gas-shielded welding power source
utilizes high-power component IGBT to transfer 50/60Hz frequency up to 30~50KHz , then reduce the
voltage and commutate, and output high-power voltage via
PWM technology. Because of the great reduce of the main
transformer's weight and volume; the efficiency increases
by 30%. The appearance of inverter welding equipment is
considered to be a revolution for welding industry.
The welding power source can offer stronger, more concentrated
and more stable arc. When stick and work piece get short, its response
will be quicker. It means that it is easier to design into welding
machine with different dynamic characteristics, and it even can be
adjusted for specialty to make arc softer or harder.
MMA welding machine has the following characteristics: effective,
power saving, compact, stable arc, good welding pool, high no-load
voltage, and good capacity of force compensation and multi-use. It can
weld stainless steel, alloy steel, carbon steel, copper and other color
metal. It can apply to electrode of different specifications and
materials, including acidity, alkalescence, and fibre. It can apply in
high altitude, the open air and inside and outside decoration. Compared
with the same products of home and abroad, it is compact in volume,
light in weight, easy to install and operate.
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