ABB RPB 320 Instruction Manual page 13

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Phase dropout leads to considerably worse welding properties compared to normal
conditions, or that it is not possible to start the power source at all.
Phase dropout can be caused by:
 A tripped mains fuse
 A defect mains cable
 Bad connection of the mains cable to the terminal block or to the socket
outlet.
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The MIG and MAG welding dynamics are controlled over the same potentiometer.
Setting the MIG and MAG welding dynamics:
The setting of the MIG/MAG welding dynamics influences the stability of the weld-
ing and the amount of spatter coming up.
The welding result can be optimized for each type of wire and each mixture of
shielding gas by way of the setting.
-9...-1 A soft arc is used to cause less spatter.
0 Recommended basic setting for all types of wire.
1...9 A hard arc is used to maximize the stability of the arc within the short-arc
range, for example, or for steel welding using 100% CO
7...9).
505 890-102
53% 
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shielding gas, (position
2
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