Specifically, this section:
Homing, Directions, and Travel
A DSP laser will have homing switches - one on each axis. They might be physical lever-type micro switches, optical beam-break switches, or inductive proximity sensors. Locate the switch at the end of the X axis, and the one for the Y axis.
When you power up the laser, the first thing it will do is move toward the corner it thinks those switches are at to home itself. If it’s moving in in the wrong direction, you’ll have to hit the ESC button on the controller itself to stop it.
Bring up Machine Settings in LightBurn, and go to the Vendor settings section at the bottom, and open the X axis and Y axis Settings. Near the top of each will be three check boxes:
Invert Keypad Direction
The first (keypad direction) controls which way the arrow buttons move the laser. The second (limiter polarity) controls which side of the machine the laser moves to when looking for home, and the 3rd (direction polarity) controls which way the motor moves in general.
There are only 4 possible combinations of “limiter polarity” and “direction polarity” for each axis. I can’t tell you which is the correct combination, but change those settings for the X axis until it moves properly when you power the machine, then do the Y axis. Once these are set, the next steps are easier.
When the limiter and direction settings are correct, check that the keypad arrows on the machine are moving the laser in the correct direction. If not, toggle the ‘Invert Keypad Direction’ button for whichever axis is wrong.
You will also need to set the ‘Max Travel’ value for the X and Y axis - these numbers dictate the length of each axis, and together define the size of the work area of the machine.