EROR ALARM:8 y 3

ruta3darg · October 25, 2025, 9:10pm

Estimados compre una CR Laser Falcon 5w de creality y el sistema Lightburn me esta arrojando estos errores al querer volver a inicio (home)
ALARM:8

Error en retorno a 0. El ciclo no pudo borrar el interruptor de límite al retirarse. Intente aumentar el ajuste de retiro o verifique el cableado.

ALARM:3

Reinicie mientras está en movimiento. Grbl no puede garantizar la posición. Es probable que se pierdan pasos. Se recomienda volver a retornar a 0.

Alguien podría orientar que podría ser?
Desde ya muchas Gracias.

MikeyH · October 25, 2025, 10:01pm

If it goes to the switch and reverses direction, but gives the alarm, a simple GRBL parameter change can fix it. All of this means you MUST have limit switches on your laser.

It is saying the switch did not open within the distance set in the parameter. Some manufactures set this value too small. Before we start, go into Machine Settings and do a Save to File. You then have a backup copy of your parameters. Never ever go in and change GRBL parameters without a backup copy and knowing exactly the reason for changing one of them.

Look for the parameter $27 (it may be labeled Homing Pulloff). If it is 1 or 2, increase it to 3 or 4. Then Home the machine to see if that makes the Alarm 8 go away.

ruta3darg · October 28, 2025, 10:48am

Gracias Mike por responder.
El $27=3 o 4 y sigue haciendo lo mismo.
Es como si no leyera los fin de Carrera.

Te comprarto el mensaje al hacer un Home.
e[0;31mE (1276706) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m

e[0;31mE (1276708) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m

ALARM:8

Error en retorno a 0. El ciclo no pudo borrar el interruptor de límite al retirarse. Intente aumentar la configuración de retiro o verifique el cableado.

ALARM:3

Reinicie mientras está en movimiento. Grbl no puede garantizar la posición. Es probable que se pierdan pasos. Se recomienda volver a retornar a 0.

ok

e[0;31mE (1278278) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m

e[0;31mE (1278280) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m

e[0;31mE (1278281) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m

e[0;31mE (1278283) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m

spindle_pwm_off_value:0.000000 spindle_pwm_min_value:0.000000 spindle_pwm_max_value:1023.000000

Grbl 1.3a [‘$’ for help]

[MSG:‘$H’|‘$X’ to unlock]

ok

MikeyH · October 28, 2025, 3:14pm

Te comprarto el mensaje al hacer un Home.
e[0;31mE (1276706) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed

This seems to indicate limit switches are not installes on that machine. Can you uplode a picture showing either of the limit switches?

ruta3darg · October 30, 2025, 4:19am

MikeyH · October 30, 2025, 2:13pm

Yes, those are limit switches for sure.

In the Console window, enter $$ and copy/paste the parameters listed in your Reply.

ruta3darg · October 30, 2025, 4:22pm

Por lo que veo el Error esa en el Switch de X

?
<Idle|MPos:3.000,3.000,0.000|FS:0,0|Pn:X|Ov:100,100,100|A:S>
ok
y en el comando $HX
$hx

e[0;31mE (503694) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m

ALARM:8

Error en retorno a 0. El ciclo no pudo borrar el interruptor de límite al retirarse. Intente aumentar la configuración de retiro o verifique el cableado.

ALARM:3

Reinicie mientras está en movimiento. Grbl no puede garantizar la posición. Es probable que se pierdan pasos. Se recomienda volver a retornar a 0.

ok

e[0;31mE (504874) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m

e[0;31mE (504876) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m

e[0;31mE (504877) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m

e[0;31mE (504878) gpio: gpio_isr_handler_remove(480): GPIO isr service is not installed, call gpio_install_isr_service() firste[0m

spindle_pwm_off_value:0.000000 spindle_pwm_min_value:0.000000 spindle_pwm_max_value:1023.000000

Grbl 1.3a [‘$’ for help]

<Alarm|MPos:3.000,3.000,0.000|FS:0,0|Pn:X|Ov:100,100,100|A:S>

ok

es como que el Switch estaría Presionado?
Si lo desconecto sigue marcando como que estuviera presionado..
?
<Alarm|MPos:3.000,3.000,0.000|FS:0,0|Pn:X>
ok

puede ser? es algo de configuraracion?

MikeyH · October 30, 2025, 4:40pm

puede ser? es algo de configuraracion?

Yes, but you do not tell us where the trolley (laser module mount) is sitting.

If it is not sitting on the switch and you see the “|Pn:X|”, then the switch is either defective or wired incorrectly. A wrong parameter setting would affect both switches.

Normally, if a switch is stuck or held closed, that would give an alarm suggesting overtravel.

With the trolley off the switch, enter ? in the Console window.
Now actuate and hold the switch, then enter ? on the Console window again.
If you see it change, the switch is wired backwards (normally closed instead of normally open)
If no change, the switch is likely defective. Be advised a wiring error could be possible too.

system · November 29, 2025, 4:41pm

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