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171
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MULTIMIG
OWNER’S MANUAL
RANGE OF WELDING CURRENT AND VOLTAGE IN CO
2
WELDING
The option of the welding speed
The welding quality and productivity should be taken into consideration for the option of welding speed. In case that the welding speed
increases, it weakens the protection efficiency and speeds up the cooling process. As a consequence, it is not optimal for the seaming.
In the event that the speed is too slow, the work piece will be easily damaged, and the seaming is not ideal. In practical operation, the
welding speed should not exceed 1m/min.
The length of wire sticking out
The length of wire sticking out the nozzle should be appropriate. The increase of the length of wire sticking out of the nozzle can
improve the productivity, but if it is too long, excessive spatter will occur in the welding process. Generally, the length of wire sticking
out the nozzle should be 10 times as the welding wire diameter.
The setting of the C0
2
flow volume
The protection efficiency is the primary consideration. Besides, inner-angle welding has better protection efficiency than external-angel
welding. For the main parameter, refer to the following figure.
Option of C0
2
flow volume