Jasic MIG 350 Pulse Separate, Operator'S Manual

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Parameters in MMA
There are 5 adjustable parameters in MMA welding, namely arc ignition current, arc ignition time, arc current, arc
characteristic (arc force) and arc breaking voltage. These parameters can be operated only through the control
panel. Select the desired welding mode before any operation on parameters.
Arc ignition current (I1)
It is located at
“
initial segment-current column-current (A)
”
. It indicates the current during arc ignition
period, and can be adjusted within the full range.
Arc ignition time (t1)
It is located at
“
initial segment-voltage column-time (s)
”
, and it indicates the time arc ignition period
lasts.
Arc current (I2)
It is located at
“
peak segment-current column-current (A)
”
, and users can set it according to their own
technical requirements.
Arc characteristic (arc force)
It is located at
“
peak segment-current column-arc characteristic (-/+)
”
. It determines the rising rate of
I3, and it should be set according to the electrode diameter, preset current and the technical
requirement. If the arc force is large, the molten drop can be transferred quickly, and electrode sticking
seldom occurs. However, too large an arc force may lead to excessive spatter. If the arc force is small,
there will be little spatter, and the weld bead will be shaped well. However, too small an arc force may
lead to soft arc and electrode sticking. Therefore, the arc force should be increased when welding with
athick electrode under low current. In general welding, the arc force may be set at 20~70.
Simple TIG welding: Set the arc characteristic (arc force) at 0 in MMA welding, and simple TIG welding can
be carried out. Simple TIG welding is a kind of DC TIG welding achieved by users in MMA welding through
adding necessary gas path equipment connected to the welding machine and igniting arc by scratching
the electrode.
Arc igni-
Arc burning
Short-
circuit
transfer Arc
Welding current
Welding volt-
Time
I1
I2
I3
I2
U1
U0
t1 t3
t2 t2
Standby
Welding current and welding voltage in MMA