Micro laser engraving machine L1 operating instructionsThe 3W and 7W laser head modules of the same machine can be exchanged. It supports offline engraving by connecting with U disk (after the machine is connected to the power supply, insert the U disk to select pictures from the machine display screen for engraving). It also supports computer engraving (before engraving, the pictures will be sent to the machine to ensure a stable work). The super large engraving area is 155 * 175mm. The machine is equipped with a maximum stroke detection circuit. When the machine is powered on, it automatically detects reset . When engraving, it also automatically detects the engraving position. It is capable of infrared cross laser positioning. So placing engraving objects would be quicker. The machine has an on / off power switch for more convenient and safe operation.