How to adjust current and wire feeding speed in gas shielded welding

Current controls weld penetration (current can also be understood as wire feeding speed. The greater the current, the more welding wires will be sent in a unit time under the condition of constant voltage, provided that the voltage is enough to melt the welding wire.

1. First adjust the current knob to the minimum and the voltage knob to the maximum, and try welding. At this time, do not move the voltage knob, and gradually increase the current until it can be welded normally.

2. On the contrary, first adjust the current knob to the maximum, then adjust the voltage knob to the minimum, try welding, don't move the current knob, and gradually increase the voltage until it can be welded normally;

3. Adjust the current and voltage knobs to the minimum, and gradually increase the voltage and current (which need to be adjusted repeatedly in the process) until you find a match that you think has the best weld formation, the softest sound and can control yourself.

Extended data:

Safety matters of gas shielded welding:

1. When using the welding torch, you must first check the suction performance and air tightness, and the connecting parts, air passages and regulating valves of the welding torch shall not be stained with grease.

2. When the welding torch is ignited, the acetylene valve should be opened first, and then the oxygen valve should be opened to adjust the flame; When turning off the fire, acetylene should be turned off first, then oxygen. When stopping use, it is forbidden to permanently connect the welding torch, hose and air source.

3. When using the cutting torch, the paint and rust layer on the working face should be cleaned, and it is not allowed to work on the cement floor, so as to avoid the splash of antirust water and cement at high temperature.

4. When the cutting torch is ignited, an ignition test should be conducted first to check whether the cutting nozzle is installed. When flameout, acetylene should be turned off first, then oxygen.

Baidu encyclopedia of gas shielded welding