Longer Ray5 stuck on "Busy 100%" at startup

[Madara (Lo)]

Hello
I am having a connection issue with my Longer Ray5 laser. As soon as the machine connects, LightBurn status switches to “Busy 100%” and I cannot move the laser or run any jobs.

My setup details:

Machine : Longer Laser Ray5
Controller : LGT LASER RAY5 V1.1
Firmware: v1.9.11
Connection: COM6 / GRBL

Console Log Observations:

The boot sequence seems to complete, ending with Grbl 1.3a ['.
However, the progress bar stays at “Busy 100%” immediately after the connection.
I noticed a message: [MSG:Compiled with ESP32 SDK:-128-NOTFOUND].
SD Card is detected and limit switches are initialized.

What I have tried so far

Restarting both the laser and LightBurn.
Verifying the COM port selection.

Is this a known communication issue or a specific setting I should check in the Device Settings?

Thank you for your help! for help]`.

• However, the progress bar stays at “Busy 100%” immediately after the connection.
• I noticed a message: DISCOURSE_PLACEHOLDER_2.
• SD Card is detected and limit switches are initialized.

What I have tried so far:

• Restarting both the laser and LightBurn.
• Verifying the COM port selection.

Is this a known communication issue or a specific setting I should check in the Device Settings?

Thank you for your help!

[NicholasL (Nicholas Leqeta)]

Have you tried toggling the ‘Enable DTR’ setting in device settings?:

[NicholasL (Nicholas Leqeta)]

Another thing to check is the power supply to the machine - if inadequate, that might cause the same issue.

[misken (Melvin)]

I’d first try the DTR signal tip. If this doesn’t work, I’d next turn off the auto home at startup. Maybe this comes too fast for the laser startup sequence.