When argon arc welding, the old arc is what causes the current to be smaller, so the arc begins when the gear is turned up!
1, to see if you are using pulse argon arc welding machine.2, if yes, that is, you adjust the switch wrong, using the pulse up.3, if not, you said that the current is smaller, just as the switch begins, the arc begins.4, the reason is argon arc welding and manual arc welding machine welding machine is dropping characteristic and we use the same current voltage is high, can maintain the arc burning, current voltage drop, low voltage normal combustion can not keep the arc start off the arc.5, for these reasons, I estimate that the power of your welding machine is small, the range of use is already its limit, so the high current is always broken.
Broken arc welding voltage is too low to maintain arc.The current is small, the voltage is high, and the arc can be maintained. When the current is high, the voltage drops, and the arc is broken when it is too low.Generally speaking, the power shortage of the welder.
Did you open or adjust the pulse switch, and try several times, you will know
