Smart 400 TIG Pulse
27
3.3 MMA OPERATION STEPS
6.
Switch the welding mode switch on the front panel of the welding machine to “MMA” position.
7.
Turn on the power switch of the welding machine. Then, the cooling fan will work, and the current meter will
display the preset welding current.
8.
Adjust the welding parameters to the appropriate values according to the welding requirements.
9.
After the above steps are finished, welding can be carried out. The current meter will display the practical
welding current.
10.
Attention: this machine is equipped with anti-sticking function. When arc voltage is overly low and machine
output is 10A to prevent big current sticking.
3.3.1 WELDING PARAMETERS FOR MMA WELDING
Adjustable
parameter
Adjusting
range
Description
Arc ignition
current
0~200A
When the selected arc ignition current is lower than the welding current, it will output
the welding current automatically when igniting arc; when the selected arc ignition
current is higher than the welding current, it will output the arc ignition current when
igniting arc. If the arc ignition arc is overly low, it is hard to ignite arc and the success
rate in arc ignition is low; if the arc ignition current is overly high, the workpiece will be
easily burned through. Therefore, the arc ignition current should be set properly
according to practical welding requirements.
Welding
current
30~400
A
The output current for stable welding.
Arc force
current
0~200A
If the arc force current is overly low, electrode sticking will occur during welding and
the arc is weak; if the arc force current is overly high, excessive spatter will be caused.
Therefore, the arc force current should be set properly according to practical welding
requirements.
3.3.2 REFERENCE TABLE FOR WELDING PROCESS IN MMA
Electrode diameter
(mm)
Recommended welding current (A)
Recommended welding voltage (V)
1.0
20~60
20.8~22.4
1.6
44~84
21.76~23.36
2.0
60~100
22.4~24.0
2.5
80~120
23.2~24.8
3.2
108~148
24.32~24.92
4.0
140~180
24.6~27.2
5.0
180~220
27.2~28.8
6.0
220~260
28.8~30.4
