Westweld NB-350MK, Manual Instruction

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● Enter the welding preparation state, and put the "2-step/4-step" switch of the welder panel to "4-step". Press the
torch switch and start to supply air and enter the pre-air supply state. Waiting for a period of time, the welding voltage
appears, and the slow wire feeding starts to enter the arcing state. After the arc is successfully turned on, the wire feeding
speed becomes a normal speed and a welding current is formed. At this time, the torch switch can be released and the
welding enters a self-locking state. At the same time, the "welding voltage adjustment knob" and "welding current
adjustment knob" of the wire feeder must be adjusted to achieve the best welding effect.
When welding to the end point, press the torch switch again to enter the arc adjustment state; at this time, adjust the
arcing voltage by adjusting the “arc voltage adjustment knob” and “arc current adjustment knob” on the front panel of the
welder. The current (or adjusted to the required value in advance, generally adjusted to 60 to 70% of the normal welding
current), so that the depression at the end of the welding can be filled. When the welding torch switch is released again, the
wire is immediately braked to stop, and the ignition state is reduced to the burn-in voltage. When the welding current is
zero, the arc-breaking is completed, the gas supply is stopped, and the welding process is completed.
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2
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2-Step weld operation (Non initial and crater)
● Mainly used for spot welding, repeated short welding, thin plate welding.
● Press the button“2-step/4-step”to “2-step”, Turn on the torch(ON) and start welding, OFF torch then end welding.