I received this information via email from the ArcDroid Programmer, Igor Yeremin:
|### Igor Yeremin|
|May 3, 2022, 1:23 PM (20 hours ago)|
Hi Steven,
As far as I can tell this is a problem with how LightBurn opens the USB
serial port. See this post about someone else using a Marlin machine:
M1000 (Chris) October 13, 2021, 7:44pm #3
Lightburn not connecting Marlin 2.0.9.2 board via USB
I was able to connect by using the Pronterface-first workaround.
The device type in LightBurn should be set to Marlin, on the device
settings screen the main options to check are DTR Enable should be OFF,
laser control set to M03/M05.
Hope that helps.
Igor
Thoughts?