I made a Rotary laser using bits of a leftover MPCN project and a rotary attachment with a J tech Photonic Diode laser. I could not get it to run on the standard Rambo board that the MPCNC uses so I switched it out for a X32 Blackbox from open builds. Lightburn software will not run the machine so I use light burn to write the Gcode and then use Open Build Controller to run the G Code. The laser is not turning off when it does movements. I’m trying to figure out how to modify the G Code to make the laser turn off when it is doing a movement.
I think I seen that kind of lines being solved in a thread a couple of weeks ago…
Not exactly as you described but could be the solution for you too. 
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Try $32=1 in the Console window.
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As @MikeyH advised setting $32=1, puts the software in laser mode.
Generally what happens is that the spindle isn’t stopped when the machine makes a move. A laser needs to be stopped before a move…
Your software has to support this mode or there must be some other way to configure it turn the pwm off when moving…
Good luck
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Thanks for the advice. That did the trick
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