I am still trying a number of things but with no success. My question is what are the strange symbols in the console.
Is this unit grounded? We have seen reports that identify static interruption or interference disrupting the communication between the computer and the motion control board.
Yes I ran a wire from top of fan of laser to the x axis. Then from x axis to the board and from the y axis to a ground outlet. The USB plug seemed loose where it plugs into main board. I was able to zip tie it up so it does not move.
Here is the latest. I have installed the 3rd 2s board and it is still stopping. Here is a little video you can hear how slow it is running. I was trying it at 2700mm/min at 38% power. It is clearing moving slower than 2700mm/min. The power seems to adjust ok when it slows it was not burning. The stepper motors are not hot. I thought maybe I had a bad stepper.
30w NEJE slowing down. - YouTube
SORRY NO SOLUTION BUT I WILL ADD THAT MY NEW 40w 2S MAX HAS THE SAME ISSUE - WORKS GREAT WITH NEJE S/W BUT ONLY AT FOCUSING POWER WITH LIGHTBURN. LIKE YOU I TRIED ALL KINDS OF SETTING CHANGES OF POWER AND SPEED - NOTHING. I WROTE A SMALL G CODE TEST PROGRAM - PROGRAM RUNS AND XY STEPPERS WORK PROPERLY BUT AGAIN ONLY FOCUSING POWER. WHEN I GO BACK TO NEJE SOFTWARE I HAVE FULL POWER THAT SAYS ITS NOT A HARDARE (DIODE PROBLEM) BUT SOME SOFTWARE INTERFACE - LIKELY ON THE NEJE SIDE - THEY NEED TO JUMP IN HERE AND FIX THIS.
IF ANYONE RECENTLY HAS SOLVED THE PUZZLE - PLEASE POST (DON’T THINK THIS WAS AN ISSUE WITH EARLIER 30w 2\S SYSTEMS BUT IT REARED ITS HEAD AGAIN.
THANKS,
DENNIS
I have really given up on the NEJE board. According to what I have read and seen. Seems NEJE got some quality control issues and some bad board got out. Do not think they know where there at. NEJE is sending me yet another board this will be the 4th board I have tried. It is not a usb cable issue, not a electric interference issue and it is not a grounding issue of any kind. I bought the Acro System from Openbuilds. Also got there controller and power supply. I am using the same USB cable and the 30w neje module. I have no issues at all, no stopped engraves, and no weird characters symbols in lightburn. My suggestion is to contact NEJE and good luck. I have been trying since mid April.
Contactedzf NEJE as well with controller issues with my 2S Max system. They wanted me to make a video of the problem - a video of a diode laser module doing nothing?
Anyway unless they come through with some real help I’ll be following in your footsteps - new controller. Did you consider using the Black Box controller from OpenBuilds retrofit onto the NEJE hardware - seems like a couple hundred dollar cheaper solution than switching over to the Acro XY hardware and the Black Box controller. Your feedback much appreciated.
Dennis
That’s a pretty old processor (8bit AT-Mega328P) in that one. I would look into some of the more recent 32 bit controllers, pretty cheap even on Amazon. Big Tree has a couple of nice ones (look for SKR V1.4). You can put GRBL or SmoothieWare (or SmoothieWare that speaks GRBL).
thanks for the good feedback - any issues with running Lightburn output through them?
I have an older K40 EBAY laser. I got it all set up and got tired of messing with the mirrors. Still got the Smoothieware and Cohesion3D boards for it. Wonder if I can take those out along with the power supply and use it on my NEJE.
@Geekineer , @gallatinrick , I use the C3D board in my K40 using Lightburn and have had absolutely no issues. I also have a Big Tree SKRV1.4 board that I got as an insurance policy in case my NEJE system craps out. So far, I’ve had no issues with the NEJE system (LM2S-30W) but I fully expect that the Big Tree board will handle the job should I need it.
I should add that I haven’t run the NEJE system for any substantially long burns. I’m not sure what the longest run has been. I’ll have to check my files tomorrow and see what I’ve done. I’ve done over 7 hours on the K40.
Having same issues
Jeepman - anything new in tryihg to get your 40W Max 2s working - I’ve tried everything - no go as of today? Maybe something to try and bypass the temp. monitoring. G codes M3 S1000 or M03 S1000 just leaves the laser diode at the minimum focusing level. ???
I’ve had good luck with the Woodpecker CamXtool V 3.4, runs GRBL 1.1f, is incredibly stable and they’ve never stopped on me, converted my diode rotary to CO2 with a cohesion 3d board, and it would only run for about 20 seconds, no alarm codes or anything. turned out to be a grounding issue on mine though.
Solution of NEJE 2S series devices stop working
Solution of NEJE Master 2 serises device stop working
great you are on it Jack, but that leaves Mac users in the dark. 
Hi, I have a similar problem and I solved it with firmware 7.7 from Neje. Solution of NEJE (Master) 2S Series Devices Stop Working – NEJE
I hope it works. Have a good day.
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Same problems here with the same config and same errors
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