I have a K40 with the a newly installed Cohesion3d board running Smoothie using Lightburn software. There are no issues with x and y-axis movement, homing or origin with the default config file setup but the laser will not fire.
The original M2Nano board works fine with the laser.
Here are the photos of the wiring.
Looking through the forum this is what I have checked so far:-
There is continuity on all of the wires from the LPSU terminals to the board plug.
The terminals are seated fully on the C3D laser board pins.
The laser fires if you connect L to GND on the plug.
The laser fires from K40 electronic test switch.
The laser power is set 38% which is 12 mA on the meter.
The board in standby - all LED’s look good.
The board when Lightburn is set to cut a simple square - looks good The Laser moves and traces the square. The K40 control board laser fire light does not light up.
I have tried setting the laser_module_pwm_period to 400 in the config file, the K40 laser fire light does not come on.
I have tried all of the G-code tests, the K40 laser fire light does not come on.
I have tried a new USB cable - no change
I downloaded the laser board firmware, renamed the original files to .old and installed - no change.
There were some other posts on possible solutions which required re-wiring but I don’t wish to try those without advice.
Hope that helps in trying to resolve the issue.
I am in the UK so replies may take a while. In the mean time I will pacify the wife who is chomping on the bit ready to do more projects on the machine.