Received crash log during cut, machine stopped, when rehomed alarm 1 scrolled several times

iEngrave
1

ave a Loklik iengraver 10 watt diode, USB connection, LEF01, windows 10. Running Lightburn 2.0.05.
It was working fine. I started to run a job and it stopped and i received this log,
Crash Log Stack Trace for LightBurn v2.0.05:

QScreen::virtualSiblings
QScreen::virtualSiblingAt
QMenuBar::platformMenuBar
QMenuBar::setCornerWidget
QMenuBar::mousePressEvent
QWidget::event
QMenuBar::event
QApplicationPrivate::notify_helper
QApplication::notify
QCoreApplication::notifyInternal2
QApplicationPrivate::sendMouseEvent
QWidgetRepaintManager::updateStaticContentsSize
QWidgetRepaintManager::updateStaticContentsSize
QApplicationPrivate::notify_helper
QApplication::notify
QCoreApplication::notifyInternal2

Undo Stack:

Redo Stack:

Support Data:
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

I restarted and it worked for a minute or two. Receieved Alarm1. Told me to rehome. when i did.
I received this alarm.
ALARM:1

Hard limit triggered. Machine position is likely lost due to sudden and immediate halt. Re-homing is highly recommended.

[MSG:Reset to continue]

Grbl 1.3a [‘$’ for help]

[MSG:‘$H’|‘$X’ to unlock]

[MSG:Caution: Unlocked]

ok
I unlocked it while I was at home and it said okay and then the same message came up 3 times. I have uninstalled machine and software a nd reinstalled them. I am a novice at lasers and computers.

1 Like
2

Hi @DawnLandagora. Welcome to the community. Let’s see if we can troubleshoot this issue and get you back up and running again.

The LightBurn crash log you posted is just the software crashing on Windows — that part isn’t related to the laser itself. The important part is the ALARM:1 message. ALARM:1 means the machine thinks a hard limit switch was triggered. When that happens, GRBL stops the job immediately and tells you to re‑home.

The iEngrave doesn’t use the normal lever‑style limit switches you see on most diode machines. Loklik uses tiny square sensor modules instead. They don’t have a metal arm and they don’t make a loud click. You’ll only feel a very soft tap when the gantry reaches them.

Here’s how to check them:

  1. Turn the machine ON and let it sit idle.
    Don’t start a job.

  2. Move the laser head by hand all the way to the back rail (Y‑axis).
    You should feel a tiny “tick” when it touches the back sensor.

  3. Move the head all the way to the left rail (X‑axis).
    Same thing — a soft tick when it reaches the left sensor.

  4. If one side doesn’t give you that little tick, that sensor isn’t triggering.
    That will cause ALARM:1 every time you try to home.

  5. Make sure the head isn’t already pushed into a corner when you power it on.
    If it starts up already touching a sensor, it will instantly throw ALARM:1.

  6. Check for anything blocking the gantry — debris, a cable, a crooked rail, anything that keeps the head from reaching the sensor cleanly.

If one of the sensors is stuck, not being reached, or the wiring is loose, the machine will keep repeating ALARM:1 even after you unlock it. Once the sensor is triggering normally again, the machine will home correctly and the alarm will clear.

3

Hey, it looks like the machine is triggering a hard limit.

Try moving the laser head away from the limit position first, so it’s no longer hitting that point.

If the position already looks normal but you’re still seeing the hard limit alert after restarting, you can check whether the limit switch connector and the mainboard terminal are loose, and reach out to support@htvront.com
and let them know you’ve already gone through these checks. They’ll be able to help you take it further.