Light burn crashing my laser after starting

Lightburn crashing my Longer Ray 5 20 watt. It worked fine yesterday. I was trying to etch wood on a small project but my laser runs 10 seconds and shuts down and restarts I have tried over and over like 10 times and I even tried a different file with same results I ran the first file in GRBL with no issues. I updated my PC windows 11 and restarted everything and still Lightburn keeps crashing my laser. I tried both wifi and hard cable with same results. I am new at this but have in-depth experience with 3D printing but I’m at loss where to look for this issue

Pretty small chance Lightburn is causing this.

shuts down and restarts

This is a pretty important statement. Crashes rarely restart themselves. You likely have an overheating power supply or laser. Reduce your programmed power to 25% of your current setting (25% of 80% is 20%) and see if it does this crash-restart thing.

Let us know what you find.

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Apparently you didn’t read what I wrote. I told you that GRBL app works good and it was able to print the same print that I’ve been running through. Lightburn so this is a light burn issue not my machine

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Yes, I did, twice. You assume GRBL (LaserGRBL) and Lightburn feed the commands to the laser, but they do not. LaserGRBL feeds it one line at a time, and Lightburn streams it to the laser as fast as the controller can accept it. Two completely different processes and that can make a difference.

I appreciate being corrected when I am wrong, but you need to cooperate with whoever is trying to help you. They will ask questions, sometimes obvious or not making sense, but to succeed you will have to answer them. It does not have to be me if that is what you want.

I do not have your machine, but I do have a solid electronics and mechanical background, and 4+ years experience with diode lasers, tabletop CNC mill, and a 3D printer.

but I’m at loss where to look for this issue

Until you say I am fired, please perform the operations I described and let us (members of the Forum) know the result.

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I thank you for the reply and response. I will still be looking into this tomorrow. I just built a test cube in lightburn so that I can test it tomorrow. Hopefully it’ll complete it. If not then I don’t know what I’m going to do. I might have to uninstall light burn and reinstall it

If you search the Forum, you will find this rarely solves any laser problem. It is possible, but feel free to eliminate this as the cause of your problems. Another thing is to reinstall a previous known working (prior to the issue) version of Lightburn.


Looking at this picture, the far right with the house is what I printed through grbl + the ones at the bottom below the house are where my laser would start and then reset on lightBurn the next picture over to the left The light colored squares were a burn test program I built in lightburn and you can see they didn’t complete five lines below that or lightburn they completed the square box that’s over burnt a little bit next to the lines is light burn and it completed. The next one to the left is a burn test that I was doing and I built this and it’s overpowered That’s why it Burnt so bad and light burn did most of it but then failed at the end which is the closest end to the picture at the bottom. The next two are both fails. One above the other and they almost failed at the same place. Lightburn will not complete any burn for me. I’ve deleted the program and rerun it and that’s where the last burn is from and it didn’t complete I’m at a complete loss here with this program

the two images I have circled with a black marker. The one on the left that was my first run in light burn. I took out the fill and I put just line on the same test that I created and it was able to complete it. Then I ran it again. The one on the right it failed on and disconnected but it looks completed but it’s not the same as the first one so I’m not sure how I’m supposed to deal with this


Here’s the disconnect

I’m trying a file in grbl and it just stopped and had a disconnect issue. But the nice thing is I was able to continue where it left off. Why can’t lightburn do that?

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This is what I accomplished today. It’s easy to read. There’s obviously a problem with lightburn I had a slight problem with GRBL but at least it was able to finish and on the failed one from GRBL I was able to restart once at the point that it failed the second time it hoomed and wouldn’t let me

Is your laser connected with usb cable or are you using it wireless? If you are on wireless forget it, use an usb cable.

That was discussed I tried wifi and cable with same results but I may have found the answer: I need a ground wire on the frame I watched a video on it so I will try that this morning

Here are two different methods that might help in resuming a halted job.

Also see:

And a video reference:

It seems to me your controller is crashing by drop on voltage
if you run the same project at a max of 10% does it also crash?

What rating is your Power Adapter?

I tried uploading a video but it won’t let me but I’m running at 32 power 1000 mm per minute. I was able to run at 3500 at 40% and I wasn’t having any issues. Now all the sudden I’m having issues. I have grounded the machine now. I put wires on there and I cleaned the connections where the screw on so they got good contact and I ran it from the front of my machine. All followed the cable all the way to the the rail screwed to the rail and then went to the top and put a screw in there. So I have everything grounded cuz I thought it was ecstatic issue. Apparently it’s not. It keeps resetting constantly. The machine will run for about 37 seconds then it just stops, shuts off resets and goes back to home

My best bet is on a failing Power adapter.
1% power on laser - let the engraving run(it wont engrave of course)

Do this a couple times, if no crash then try replacing the power adapter.

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It’s a brand new machine. Why would the power adapter be bad? The machine’s only 2 weeks old. The power adapter came with it

I just did a wire frame 100 mm by 100 mm of a Harley logo and it completed that 2 minutes and 30 seconds approximately and I did it twice but if I do the more intricate designs it fails within 37 seconds

I just took your suggestion. Ran it 1% at 1,000 mm. It ran for about 37 seconds and stopped reset and homed