I’m very new to LB - a couple of days. I am using an inexpensive laser module attached to my CNC router. It is a Sienci Long Mill. I am running a grbl-based controller running 1.1g. I have turned on laser mode $32=1 and set the speed using $30=1000. In LB, I set max power to 1000. I turned on the fire button feature. However, when I turn on the laser, the fire button does not seem to do anything no matter what I set the percentage to. If I set the percentage to 0, I thought clicking the fire button would turn the laser off. It does not.
Are there other settings that I need to set to get this feature to work?
That is the opposite of how it’s supposed to work - you set it to something above zero and it turns on the beam for focusing. Have you successfully used the laser with LightBurn in other ways? As in, have you been able to run a cut or engraving job?
@LightBurn Tks for replying, Oz. I think that I did not explain myself well. It doesn’t matter what I set the fire button percentage to. It does not change the power of the laser. It burns just the same.
Since writing my first post, I have been trying to use LB. So far, I have not been successful. It appears that the PWM is not working at all. I am basing that on the fact that the laser seems to be always at full power. When I do a burn, the laser does not power down when moving from one object to another. The movement of the laser speeds up, but the power does not reduce. The gcode does have an M4 command at the start.
@LightBurn It supports PWM and TTL. There is a port on the board that is a 2-pin pwm port. I have a cable running from that to the pwm port on my cnc controller. It just does not seem to be doing anything. The laser runs the same with or without the cable connected,