When the current is constant, the voltage and wire feeding speed should be adjusted in reverse. If the welding wire is1.2; The voltage is 18V and the wire feeding speed is 60CM/MIN. Generally, only the voltage is adjusted. The main feature of the best welding specification is that the weld is well formed. The welding process is smooth and the splash is small, and the sound of sand, sand and sand is heard during welding. When welding, I saw that the pointers of the ammeter and voltmeter of the welding machine were very stable and the swing was very small.
Adjustment steps of the best welding specification: according to the workpiece thickness and weld position, select welding wire diameter, gas flow rate and welding current. Try welding on the test plate, carefully adjust the welding voltage and arc thrust according to the selected welding current, and the optimal welding voltage is generally between 1~2V. According to the weld formation on the test board, the welding current, welding voltage and gas flow rate are properly adjusted to achieve the best welding specification.
In the process of formal welding on the workpiece, attention should be paid to the voltage drop caused by welding circuit and contact resistance, and the welding voltage should be adjusted (fine-tuned) in time to ensure the stability of the welding process (for larger workpieces).