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edges are less likely to bind and are easier to control.
1.4.7. Use the power tool, accessories and tool bits etc. in accordance with these instructions,
taking into account the working conditions and the work to be performed. Use of the power tool for
operations different from those intended could result in a hazardous situation.
1.4.8. NOTES OR PREVENTIVE MEASURES
1. Environment
1) The machine should be operated in dry environments with humidity levels of max 90%.
2) Ambient temperature should be between -10 to 40 degrees centigrade.
3) Avoid welding in sunshine or drippings. Do not let water infiter the machine.
4) Avoid welding in dust area or the environment with corrosive gas.
5) Avoid gas welding in the environment with strong airflow.
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
Summary of Contents for RD-IW220
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