if the welding machine is placed in a humid place or when it is not used for a long time, it will be damp.
non-professionals, please do not disassemble and repair, there is high voltage inside. dx-30a spot welding machine high power 220v 110v for gold silver copper and iron efficient workpiece welder.syi if the above phenomenon is found during use, it should be dried the foot can not be stepped on the foot switch for a long time, step on it and remove it immediately, such as stepping on the switch for a long time, the machine is in a short circuit state when stepping on the foot switch, do not touch the metal part of the tungsten needle and the tweezers at the same time, otherwise there will be a needle puncture feeling.flashing is harmful to eyes, please take protective measures when using.