Welding joint problem handling: gas can't emit light.表现: 焊接状态时,扣动扳机后,出气送丝,红光正常可见,但是不出激光Performance:In the welding state, after pulling the trigger, the gas is vented to feed the wire, and the red light is normally visible, but no laser is emitted.原因分析: 逻辑上,当出气时,出光信号也会发出去的,当激光器未收到出光信号(端口故障)或激光器有问题时