4 OPERATION
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current welding or all-position welding, selecting the correct arc force current is even more important.
Set it according to the requirement of the welding process.
4.2.5 Arc ignition current potentiometer
It is used to adjust the arc ignition current value, and it does not function in TIG mode. Generally, it is
recommended to set the arc ignition current at a higher value. It can be adjusted to a lower value to
reduce spatter during arc ignition or to avoid workpiece burn-through when the workpiece is very thin.
4.2.6 Interface for the remote control
When using the remote control with cable wire, insert the aviation plug on the remote control cable into
the interface for the remote control on the power source, and tighten it clockwise. Turn the local
control/remote control switch on the front panel of the power source to “remote control” position, to set
the power source to remote control state. At this time, the current control knob on the front panel of the
power source will not function, and the welding current can only be adjusted through the current
control knob on the remote control. Connect the remote control to the corresponding interface when
using remote control, and then the welding current can be adjusted by the remote control.
4.2.7 MMA/TIG switch
Turn the MMA/TIG switch to “MMA” position, to use MMA welding function. Turn the MMA/TIG switch
to “TIG” position, to use the TIG welding function.
NOTE!
Lift-arc is adopted in TIG mode.
1. Lean the ceramic nozzle of the TIG torch to the work piece.
2. Lower the electrode gradually to contact the work piece by shaking the torch.
3. Move the electrode away from the work piece gently by shaking the torch
again.
4.2.8 LED indicator
When the overcurrent indicator illuminates, it indicates that the power source fails or an accidental halt
occurs. In this condition, shut down the power source and restart it. If the problem persists, shut down
the power source and contact the service personnel. When the overheating indicator illuminates, the
power source will stop welding. In this condition, it is unnecessary to shut down the power source, and
welding can be continued after the overheating indicator goes out. The thermostat is used to protect
the power source from overheating, to prolong the lifespan of the power source. Overheating might be
caused by many factors, for example the fan does not work normally, the power source has been used
for a long time beyond the rated duty cycle, or the power source has worked for a long time in the
environment with a high temperature (over 40 °C). Once overheating occurs, the thermostat will turn
off the current and voltage output of the power source.
4.3 Welding operation
MMA welding process
Switch on the air switch on the back panel after correctly installing the power source, and the power
source will be started. Then, the current meter on the front panel displays the preset current value,
and the fan begins to work, then, adjust the welding current and adjust the arc force current.