@dc42 said in Drive PWM laser using external mosfet module?:
@Denis said in Drive PWM laser using external mosfet module?:
@dc42 If my laser is 24 volts, can I connect to the PWM from the LASER/VFD output and power it from the 24v input or from the heater?
If the laser accepts a 5V or TTL level PWM input signal, then you can connect the LASER/VFD output to that and the laser power supply voltage is immaterial. Make sure that you have the Duet and laser grounds connected.
I had out9 connected to pwm. and the power for the laser connected to the out1 connector, because I wanted to turn the power on/off with it. I tested the laser and everything seemed to work fine until I realized that even though out1 is off my diode laser fan still runs.
Luckily nothing seems to have broken.
so did i understand correctly that i can't control the laser power directly from the duet board when i want to turn it on/off?
Maybe I should put a relay in between.