Hi,
Im trying to Control a 10w Chinese Laser with a Arduino Nano.
I flashed grbl 1.1 on the Arduino and Im using Laser grbl.
But when I try to Control the laser through the D11 Pin, the Laser is on Full power.
I also used a LED to check the outcomming pwm signal and it works ( LED is brighter at S1000 than S30)
So how do I control the laser through a pwm signal ?
What revision of GRBL did you flash?. At 1.1h the PWM output pin was moved to D13, which was the z limit pin, you should find your PWM signal there. Your test with a led is not really very conclusive as you are seeing a very small voltage level change on D11 and concluding it is the PWM signal…it is not.
Once you change to the D13 pin send G1F2000S10M3 and your laser should fire weakly, sending an M5 should shut the laser off, after that just send M3 to switch it on and Sxxx to control the intensity.