Laser head installation knowledge: When the laser head leaves the factory, in order to prevent static electricity from damaging the laser tube, there are generally protective solder joints (a larger solder joint on the laser head circuit board or on the cable) to attach the laser tubeThe power supply pin is short-circuited to the ground. Before installing the bald head, it needs to be welded with an anti-static soldering iron, or the electric soldering iron should be heated to about 250 degrees Celsius - 280 degrees Celsius, disconnect the power supply, and then open the protection point.