still exist, i’ve just give up
if you know a bit about terminal emulation then you could try connecting to your USB device(/dev/ttyUSB1 or /dev/ttyUSB0 depending on what you see in dmesg output ) at the correct baudrate and then try the reset button on the laser so you see the GRBL output.
I would try 115200 and then 9600 baud. On my little 15W Ortur diode laser I use Minicom to connect:
minicom -D /dev/ttyACM0 -b 115200
and when I power on the device it homes and when I hit enter key I get “ok” back.
Then since GRBL will give you settings with the “$$” command I enter that and get this:
ok
$0=2.000
$1=50
$2=0
$3=1
$4=0
$5=0
$6=0
$10=3
$11=0.050
$12=0.002
$13=0
$20=0
$21=1
$22=1
$23=7
$24=600.000
$25=3000.000
$26=100
$27=1.000
$30=1000
$31=0
$32=1
$33=250.000
$50=0
$100=80.000
$101=80.000
$102=80.000
$110=9000.000
$111=8000.000
$112=9000.000
$120=2200.000
$121=1800.000
$122=2500.000
$130=160.000
$131=150.000
$132=1.000
ok
So if you can’t connect to your device, which you showed to be /dev/ttyUSB1 in the previous output from the dmesg command then you should get errors which should tell you something about why Lightburn can’t connect.
I’ve connected 3D printers, CO2 and diode lasers to many different machines and different versions of Linux. Problems have always been related to the port access. Either the port was being taken by another process so the software couldn’t make a connection or the access rights and group settings were incorrect.
FYI, a soft reset of the GRBL controller is done with the “! Ctr-x” commands. When I entered ! followed by Ctr-x in minicom console I get the following from my Ortur diode laser:
Ortur Laser Master Ready!
OLF 140.
Grbl 1.1h ['$' for help]
@DougL is right about this… Linux is very forgiving and handles usb quite well.
It’s usually due to system/user protection as he stated.
We will help you if you want and try to determine what’s going on.
Can you run Lightburn from sudo or the root account?
If you can and it connects it’s surely a protection issue.
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