# Falcon2 22w error 80 alarm 3

**URL:** <https://forum.lightburnsoftware.com/t/falcon2-22w-error-80-alarm-3/179367>\
**Category:** Creality\
**Tags:** grbl, homing\
**Created:** [September 5, 2025, 7:55pm UTC](https://forum.lightburnsoftware.com/t/falcon2-22w-error-80-alarm-3/179367 "2025-09-05T19:55:22Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![silverjim](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/s/b9bd4f/32.png) [@silverjim](https://forum.lightburnsoftware.com/u/silverjim)\
**Post date:** [September 5, 2025, 7:55pm UTC](https://forum.lightburnsoftware.com/t/falcon2-22w-error-80-alarm-3/179367/1 "2025-09-05T19:55:22Z")

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started having issues with my falcon2 22w. i can home but cant frame, move or start a project without it immediatly stopping and throwing the following  
error:80  
On or near line 1:  
ALARM:3  
Reset while in motion. Grbl cannot guarantee position. Lost steps are likely. Re-homing is highly recommended.  
On or near line 1:  
Job halted

heres what i have for settings  
$$  
$0=10  
$1=250  
$2=0  
$3=4  
$4=0  
$5=0  
$6=0  
$10=1  
$11=0.010  
$12=0.002  
$13=0  
$20=0  
$21=1  
$22=1  
$23=3  
$24=2000.000  
$25=4000.000  
$26=20  
$27=5.000  
$30=1000.000  
$31=0.000  
$32=1  
$100=80.000  
$101=80.000  
$110=25000.000  
$111=8000.000  
$120=500.000  
$121=500.000  
$130=294.000  
$131=305.000  
$150=4  
$151=4  
$152=30  
$153=0  
$154=0  
$155=0  
$156=1  
$157=1  
$160=1  
$161=8.00

$#  
[G54:-nan,0.000,0.000]  
[G55:-nan,0.000,0.000]  
[G56:-nan,0.000,0.000]  
[G57:-nan,0.000,0.000]  
[G58:-nan,0.000,0.000]  
[G59:-nan,0.000,0.000]  
[G28:-nan,0.000,0.000]  
[G30:-nan,0.000,0.000]  
[G92:0.000,0.000,0.000]  
[TLO:0.000]  
[PRB:0.000,0.000,0.000:0]

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**Author:** ![soniclab](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/soniclab/32/67657_2.png) [@soniclab](https://forum.lightburnsoftware.com/u/soniclab)\
**Post date:** [September 5, 2025, 9:19pm UTC](https://forum.lightburnsoftware.com/t/falcon2-22w-error-80-alarm-3/179367/2 "2025-09-05T21:19:40Z")

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> [@silverjim](#):
>
> ALARM:3

> **[GRBL Errors - LightBurn Documentation](https://docs.lightburnsoftware.com/2.0/Troubleshooting/GRBLErrors/#alarm3)**
>
> Better software for laser cutters

[![](https://img.youtube.com/vi/zzQ9-K-7UqU/maxresdefault.jpg "GRBL Errors: Alarm 3") ](https://www.youtube.com/watch?v=zzQ9-K-7UqU&t=1s)

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**Author:** ![misken](https://forum.lightburnsoftware.com/user_avatar/forum.lightburnsoftware.com/misken/32/47593_2.png) [@misken](https://forum.lightburnsoftware.com/u/misken)\
**Post date:** [September 6, 2025, 6:20am UTC](https://forum.lightburnsoftware.com/t/falcon2-22w-error-80-alarm-3/179367/3 "2025-09-06T06:20:41Z")

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If everything works except starting the job, the power supply most likely has died. Try to run the project at 0.1% power, if this succeeds, the power supply is dead.

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**Author:** ![silverjim](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/s/b9bd4f/32.png) [@silverjim](https://forum.lightburnsoftware.com/u/silverjim)\
**Post date:** [September 6, 2025, 6:49pm UTC](https://forum.lightburnsoftware.com/t/falcon2-22w-error-80-alarm-3/179367/4 "2025-09-06T18:49:45Z")

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reflashed laser head and board with updated firmware, got rid of error 80. still getting Alarm:3 when i attempt to start a job. even with the power dialed back to 0.01.  
when i attept to frame the job i get this:  
Starting stream  
Stream completed in 0:00  
[MSG:Using cpu\_map…esp32-s3]  
Grbl 1.1f [‘$’ for help]

this happens both on the rotary and on the flat bed. and with each the laser head moves a fraction before stopping.  
A/c adapter seems to be fine  
all connections seem to be solid  
the usb cable is new with the ferrite on each end

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**Author:** ![Pete.IRL](https://forum.lightburnsoftware.com/letter_avatar_proxy/v4/letter/p/ea666f/32.png) [@Pete.IRL](https://forum.lightburnsoftware.com/u/Pete.IRL)\
**Post date:** [September 6, 2025, 11:24pm UTC](https://forum.lightburnsoftware.com/t/falcon2-22w-error-80-alarm-3/179367/5 "2025-09-06T23:24:11Z")

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Jim  
I just did a search in previous topics for alarm 3 and most were caused by a bad usb cable.  
You might find more info in Lightburn Doc’s alarm3 that will infor you more.