OPERATOR’S MANUAL · MIG/MAG PULSE SERIES
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Combined with Figure 6.1, parameters in MMA are described as below.
1) 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.
2) 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.
3) 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 big, the molten drop can be transferred quickly, and electrode sticking
seldom occurs. However, too big 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 arc force may
lead to soft arc and electrode sticking. Therefore, the arc force should be increased when welding
with thick 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
scraping the electrode. Various TIG operation modes in general TIG welding are unavailable in simple
TIG welding.
4) Arc breaking voltage (U1)
It is located at “peak segment-voltage column-voltage (V)”, and it is used for setting the arc breaking
voltage during welding. This parameter is specially designed to meet the requirement in HF intermittent
welding, and its resolution is 0.1V. The arc breaking voltage indicates the maximum allowable arc
voltage during welding, that is to say, welding can be continued when the arc voltage is lower than
U1, or else welding will stop immediately. Generally, the arc breaking voltage should be higher than
40.0V.
Operation tips
Arc ignition mode in MMA (arc force≠0)
Low current arc ignition: It can be also called lift/soft arc ignition. Set the arc ignition time
to be a value other than 0, and the arc ignition current (I1) to be a value lower than I2 and
the machine will enter into low current arc ignition mode.
Touch the workpiece with the electrode,
and lift the electrode to the normal position to weld after arc is ignited.
High current arc ignition: It can be also called contact/hot start arc ignition. Set the arc
ignition time to be a value other than 0, and the arc ignition current (I1) to be a value not
lower than I2 and the machine will enter into high current arc ignition mode. Touch the workpiece
with the electrode, and normal welding can be carried out without lifting the electrode.
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