New Laser Hard Limit Error

LightBurn Software Questions
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1

Hi,

I just replaced my Atomstack S20 Pro with the A40 Pro V2.
I set it all up in Lightburn, but the moment I press “home”, I get a double beep from the laser controller and the following error in the console

Homing
ok
ALARM:1
Hard limit triggered. Machine position is likely lost due to sudden and immediate halt. Re-homing is highly recommended.
[MSG:alarmCodeCodeIntHandle:1
]
Grbl C10-0132-V1002 ['$' for help]
[MSG:Check limits]
[MSG:'$H'|'$X' to unlock]
[MSG:Caution: Unlocked]
ok
Grbl C10-0132-V1002 ['$' for help]
[MSG:Check limits]
[MSG:'$H'|'$X' to unlock]
[MSG:Caution: Unlocked]
ok

I can move the laser around from Lightburn by using the icon on the left to set laser position (underneath the Text option and above the ruler), so I know Lightburn is able to control the motors.
I have it set to start from absolute coords.

I’m fully happy to admit this could even be a simple stupid wiring problem that I’ve caused by misreading something. Does anyone have any ideas as to where to start?

Thanks,
Phil

2

I found the fix. The hard limit it was complaining about was the Z axis. As soon as I told Lightburn to drop the Z axis by a few mm, it was then homing without an issue!

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