Additionally, I don’t see any direct way fan signals would be sent with the pins on the laser module for V, S, GND (12V, Signal - PWM, and Ground). I have a Neje 30W and it has a temperature output, however they advise you to ‘ignore it’ in the documentation.

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But I guess the easiest thing is a good enclosure, then the noise will be reduced to a very low level.Question is whether there is a GRBL command in Lightburn to de-activate (or spin down) the fan unless the Laser becomes activated? Keep in mind that anyone can view public collections—they may also appear in recommendations and other places. But really care about the air volume provided, otherwise you will again shorten your diode lifetime very much.