I have a Neja Master 2S max and am trying to use (X)Ubuntu 20.04.
It won’t detect automatically so I set it up manually.
Under “Devices” ttyUSB0 GRBL are showing but the laser remains disconnected.
If you see a USB device detection event in your system log but there is no ttyUSB[0-9] device it may be the CH340 USB serial adapter problem. There is a braille terminal based on that adapter and you may have a configuration for that even if you don’t need it. Unfortunately that configuration inhibits the creation of the ttyUSB device and Lightburn cannot access your engraver. Note the vendor/device ID and search in /usr/lib/udev/rules.d/* If an entry shows up edit that rules file, comment the line found and reload with udevadm control --reload-rules.
OK, Let’s take a step back…
First, I suggest that the link for the (vital Linux) install instructions is put on the actual download page so people know they even exist, don’t miss vital first steps and get fed up! Somewhere in here might be good?: Download & Trial - Try before you buy – LightBurn Software
I am now starting from scratch on a different computer, using LUBUNTU 20.04.
Q: If I already downloaded a trial version to this IP recently, does that affect reloading another one?
I Installed Lubuntu 18.06 and upgraded that to 20.04, then did the USB tweaks via the console as per the installation instructions here: Installing Lightburn - LightBurn Software Documentation (Thanks berainbl !). I then proceeded to reinstall Lightburn. This time The laser showed “ready” but would not connect. (shown “waiting for connection” in the console window).
The other day I changed the baud rate in Lightburn to 921 600 (via the “toolbox” window at the top) and by re-flashing the Laser firmware. I changed that back again to 115 200 on both. Still no joy.
I then moved the USB lead around various USB ports on the Computer and found the active one, so was able to move the laser around!
Thanks for everyone’s input! To help others, please move the installation instruction link onto the Lightburn downloads page.
Tomorrow I will try actually cutting something, so I may be back for more advice…