An issue about stoopping in the middle of the project

Hello, I’m new to this field and got an issue of stopping in the middle of the project, I searched alot but still no solution, would you please help ?
[MSG:Pgm End]
Starting stream

Stream completed in 0:14

ALARM:3

Reset while in motion. Grbl cannot guarantee position. Lost steps are likely. Re-homing is highly recommended.

[MSG:Pgm End]

ok

Grbl 1.1h [‘$’ for help]

[MSG:‘$H’|‘$X’ to unloc]

error:9

G-code locked out during alarm or jog state.

error:9

G-code locked out during alarm or jog state.

Grbl 1.1h [‘$’ for help]

[MSG:‘$H’|‘$X’ to unlock]

[MSG:Caution: Unlocked]

ok

ok

ok

ok

ok

ok

ok

ok

ok

o

ok

ok

ok

ok

ok

ok

ok

ok

ok

ok

ok

ok

ok

ok

ok

ok

ok

ok

ok

<Idle|MPos:118.637,326.822,0.000|FS:0,0|WCO:0.000,0.000,0.000>

ok

Starting stream

Layer C09

k

k

k

o

k

k

o
I get this in my console, I believe that the issue is in here ‘’ ALARM:3
Reset while in motion. Grbl cannot guarantee position. Lost steps are likely. Re-homing is highly recommended."

I have Arduino CNC Shield – 100% GRBL Compatable

Given the error Alarm 3 is a persistent 2 options possible
a) Your power adapter is under spec or failing
Try running the same project but before, unplug your laser module cable
Laser will do all the motions but not lase. Will the Alarm 3 still happen?

b) Something near your laser is starting and stopping - maybe an appliance - and is causing electrical noise that is making the controller crash.

ok, thank you , I have just pluged and unpluged my laser module cable and did not get that Alarm …I got this


<Idle|MPos:-10.662,0.000,0.000|FS:0,0|WCO:0.000,0.000,0.000>

ok

Starting stream

Layer C09


But when I stop the project manually I get this


Job halted

Stream completed in 0:16

ALARM:3

Reset while in motion. Grbl cannot guarantee position. Lost steps are likely. Re-homing is highly recommended.

ok

Grbl 1.1h [‘$’ for help]

[MSG:‘$H’|‘$X’ to unlock]

[MSG:Caution: Unlocked]

ok


If you stop the job manually, you will get alarm 3 that’s normal

Can you let the job RUN to the finish with laser unplugged?
Or laser at 1% power if you prefer.

ok, I let a project of 45 minutes running with 1% laser power, it stopped after 85% of the entire process , giving nothing in the consel except this


<Idle|MPos:339.117,-111.744,0.000|FS:0,0|WCO:0.000,0.000,0.000>

ok

Starting stream

Layer C09

k

k

k

o

o

k

o

Definitely seems to me you are having an EMF issue

Any big appliances near? Fans, fridge, AC?

Could you move the machine elsewhere entirely and run the 1% test?

Would ypu please Explain what EMF stands for ?

And indeed I have a fan and computer running in this room . I will stop the fan and change the machine power supply elsewhere . under 1% laser test.

EMF stand for ElectroMagnetic Field - although we are using these terms loosely.
For example, high-power electrical devices can create a spike in the electrical current when they’re switched on or when their motors kick on. Refrigerators, air conditioners and even space heaters can cause a power surge strong enough to damage electrical systems.

So if your fan is turning on and off, it can cause the motherboard to get confused and crash.

2 Likes

I isolated my fan and kept nothing but the machine and my pc ,
I moved the machine elsewhere entirely and tested many times with 1% laser power
buuuut still the same issue . stopping at 85% -88% -51% …
the weather here is so hot, so could it be an issue ?
I calculated my home electricity voltage and seems to be fine.
the machine adapter is not that hot.

please suggest my anything else :pensive:

At this point I would replace the power adapter all together and get in touch with the manufacturer.