4.2 If the connection is successful, console window prints “Grbl 1.1h ['$' for help]”.
4.3 Place wood or other materials under the laser head. Enter “M3 S50” in the command
window, and then press Enter. The laser will be turned on with low power.
M3: Laser ON
S5: Laser output power 50, the minimum and maximum value is 0 ~ 1000
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