The actual installation is really quick. You basically unplug the fan cable from the Ender 3 motherboard and then plug in the laser cable instead. The laser has three magnets that attach to the print head, however the magnets aren't very strong and are positioned a little to far apart, so the print head bounces around a little as the print head moves. I taped it down, but probably a better idea is to 3d print some kind of enclosure that would keep everything aligned.
I used the software from https://www.creality3dofficial.com/products/creality-blue-violet-light to convert a JPG file into a bunch of gcode commands.
The gcode basically starts at the bottom of the picture and moves across the x-axis. It uses a M106 S255 to turn the laser on full power, and then use G1 commands to move along the X axis. Then it uses M107 to turn the laser off and uses G0 commands to continue along the X axis (and sometime also changes the Y slightly -- like 0.05333). In my case the G1 commands are at speed F900 and the G0 commands are at speed F3600.
Changing the F900 would result in more/less time burning & changing S255 would impact the power level of the laser. You can also focus the laser by manually turning the ring at the tip of the laser.
The biggest surprise was that for some reason there was a "G0 Z1" command, which proceeded to lower the laser from its manual setting of 100mm down to 1mm; smashing the print head into the board. My instant reaction was to try to grab the laser so it didn't get smashed (but I knew that soon it would be turning on.) So I removed the "G0 Z1" command and reran the job. It worked fairly well, but surprise... there was a "G0 Z6" as the last step.
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