I thought that I would start a new topic, as my latest issue does not really fit into the other two laser topics.
I have the V2 LongMill controller.
I now have my laser mounted and working - sort of. I am using LightBurn software. I have two issues:
I can do line burns, but I cannot do shading/fill burns. The laser does not power down in those areas that should not be shaded even though LightBurn shows them as red/fast move areas.
I cannot use LightBurn to fire the laser at a low rate to set my 0 position.
Here are the steps that I’ve taken so far to address the problems:
I have uninstalled and re-installed LightBurn. No joy.
I have made sure that $32=1 and $30=100 are set. A $$ command in both UGS and Lightburn confirms this.
I have set the power setting in Lightburn to 100 to match the grbl setting.
I have confirmed that the polarity of the cable running from the PWM terminal on the LongMill controller to the laser drive board is correct.
I have confirmed that there is an M4 command at the start of the test gcode file. This command allows for variable laser power, and should turn the laser off when it is not moving.
I have concluded that PWM is not working. From what I’ve been able to read, this should be the function that modulates the power of the laser so that it can do those things that mine cannot do.
If anyone here has any advice on what else I can do to diagnose the problem, I would be most grateful. As it is now, I’m out of ideas.