PWM frequency

1

I have a N40630 Engraving Module. I’m trying to set up in grbl. I’m looking for the PWM frequency and duty cycle settings. It comes on but I can’t get low power

2

https://neje99.com/faq/how-to-make-laser-module-work-with-your-control-board.html

3

Thanks but that’s has nothing to do with duty cycle and pwm settings.

4

https://neje99.com/troubleshooting/troubleshooting-of-neje-laser-module.html