this is an important find that neje and ortur should immediately start working to fix on their frame circuitry! way to easy to overload the most expensive component of the system. I have not heard anyone else talk about this, you deserve a medal! perhaps an interim fix would be to put a manual disconnect switch atop the laser module?
Hello John Wayne Williamson, thank you for your comment and compliment. Yeah, I think that a switch on the module will help, but they should add the protection at the base including some diodes correctly dimensioned. Ciao
Same exact thing happened to me on my brand new Sculpfun S9 on my first day. Sculpfun sent me a new control board which did not fix the problem. I'm sure I did this while manually moving the XY axis. Great work. Now I know what to do.
Well, this is not a small issue, and it can not be fixed by firmware update. I think Neje should be the first who offers a solution for this especially under warranty time. I just bought the machine 2 weeks ago. So i owe you big thanks to this warning. I will also follow you especially about this subject, because i am sure someone sooner or later will comes up with a hardware solution.
You also have it on all 3d printers and other devices because motors can also be generators that's why you have to move the axis slowly so it doesnt generate power to the point of burning something on the circuit..
Thank you so much for working this out! I had the same issue when I went to use my laser today. Thanks to your advice, I disconnected the laser module and found that the device was then correctly initialized, so I will be ordering a replacement module. The last time I used my laser, on 12/24, I left it unsupervised for a little while and when I got back to it, I found that it was stuck in a position - I believe a guest mistakenly blocked it from moving - and had burned through the 4mm thick wooden Christmas tree ornament and had etched the stone tile beneath it. I'm lucky the stepper motors seem to be fine, but I'm sure that shortened their lifespan.
Hello Notashroom, thank you for your comment. I am sorry to hear that. Most probably, the heat generated by the fire damaged the circuitry inside, the positive side is that nothing in the surrounding caught on fire. CIao
thank you very much for the good information I hope the module will be repaired soon. I am using the same model I also thought that reverse current flows when the axis is moved by hand. Thanks to your video, I have prevented the same problem from happening. I'll have to put the NEJE software at the origin and turn the power off like when the NEJE software was first run. May I ask you one question? When the power button is pressed once and when the power button is pressed twice And do you know what the difference is when you press and hold?
Hello Bebepapa, thank you for your comment. I will try to repair the module, but in the meantime, I have the 40W module. In regards to your question, the function of the button depends on the state of the machine i.e., ON, OFF, WORKING. - If you push it once while the machine is plugged in but is off, it will power the machine on (off means that the laser does not shine) - If the machine is on, i.e. the laser shines then: a single push send the machine home, once more and send the machine to the latest engraved position, once more and it starts engraving the previous job (apparently the machine has some memory). - If the machine is working, one click will pause the machine, click again and it will resume. - Two clicks it seems to do nothing - Holding for a few seconds shuts the machine off (only the laser) I do not use that button, but it does something. I hope this is helpful. Ciao
Thanks for this important info, I have a Neje 40W master 2S plus my selfe, and i have been wondering about that fan moving , i will be moving it a bit slower from now on !
Thanks for the work you did trying to figure out the problem. I thought if maybe you lightly touch the fan with your finger to prevent it from moving while you position it on the x,y axis, it would not spin the fan and create a current flow. I started up my machine, but noticed that the fan does not move at all while manually moving the module around the x,y axis. Maybe this was a fault of only some machines?
Hello Lance Davies, thank you for your comment. The current is generated by the stepper motors, i.e. the one responsible for moving the axis which is set to rotate as we move the axis manually. The fan spins because it is energized by that current coming from the stepper motors. I would not suggest stopping the fan. Anyhow, I am not sure if this is a flaw of some machines only, in my view the reverse current protection is not included in the design at all. Ciao
I was told when I purchased my 3D printer I should not move the hot end by hand and if I had to move it to move it very slowly, looks like it goes for the Laser module as well.
Thanks for this am soon going to order the 80w module based on reviews. Am concerned though about there support I actually wrote an email to Neje and although they replied very quickly non of my questions were answered so a waste of time. Your video has really helped though thanks
The 80w laser arrived and after a brief test this thing is very powerful. Using the supplied test board I set the laser at 4% and tried on corrugated card and it drew a perfect picture without any burn smudges. Tomorrow will be installing on my home built 400mm x 400mm frame. I was lucky as well the item was delivered without intervention by customs.
So I have the same issue u have no ive been using neje 30w for 1 year cna I just get another 30w module in amazon and connect and hood to go? I diag the same as you I unplug the reed wire and worked fine the moment I fought the laser connections it’s stoppers and started blinking
I bought an NEJE 4 e80 still never used, is it normal that the module already smells like burnt electronic? like when you fok up a drill for forcing and heating too much. Thank you
Hello Adama Thiam, thank you for your comment. Hopefully is not the case but let's try to isolate the problem. Try to disconnect the module and see if the machine initializes and connects with the computer, then try to send an engraving job and check if it works, I mean just the movement. If the above goes well then the module is most certainly gone. Let me know. Ciao
Thank you for this informative video. I did a mistake today. It's working voltage are 12 and ortur master 2 Pro operating voltage are 24 and today I connected neje 30 watt Laser module with it its blow up. Can you help me how to repair it.
Hello Atif Ali, thank you for your comment. I am sorry to hear that, I am afraid that multiple components might have to get damaged. In order to understand the extent of the damage, you'll need to open the module paying attention to don't tearing apart the connectors on the inside, then you will be able to examine the board looking at components that simply look burned or not perfectly right. There is no rule of thumb here. In my board the MOSFET seems to have taken the hit but yet I am not 100% sure that is the only component. By the way, I receive the replacement MOSFETs and I will try soon to fix the laser. Let me know if you find out more, eventually, you could share in private the pictures of the board to my email: info@whathowwhysolution.com so I can try to see what component might have been affected. Ciao
Good afternoon! Thanks for this video! I have the same problem ((( The laser module burned down after manual movement. I disassembled the module, but I didn't see any signs of damage, and the electronic element that you talked about in the video was initially unmarked. Do you know what this element is and what it can be replaced with? Is he really the problem? you said that you got transistors, did you manage to repair the laser module? I do not understand circuit design and therefore I ask for your help! Additionally, I wrote to your email, thank you!@@MiddleRoomWorkshop
hi, i have been using 2s max for about 5 months. My laser module broke down and was replaced with a new one, but now I cannot use it with any application other than the neje application. i have lightburn and laser gbrl connection problem. When I try to connect, the blue light on the module disappears. what should I do? thanks
Hello NİDA MELEK KURTOĞLU, thank you for your comment. The laser module on its own should not affect the connection with the PC by any means unless you did not replace the Mainboard as well. The machine runs in two modes, either NEJE mode using their proprietary software and you will see a blue LED on, or in GRBL mode using the other software like LightBurn and Laser GRBL in which case the blue light should go off and a yellow or orange should go on. Did you perform some updates after the replacement? Have you tried checking whether when you close the NEJE app, the app actually stops running in the Task Manager?, try to check that or restart your PC altogether. If this does not work you suggest you re-install the CH340 Driver using LaserGRBL from Tool > Install CH340 Driver. Let me know how that goes and we can investigate further. Ciao
Hello Mark Gopie, thank you for your comment. Yes you can, but you will damage the connector in the long run, rather before powering down push the red button located in the motherboard to home the axis, than you can power down the system. I hope it helps Ciao
Hello Keith Armstrong, thank you for your comment. If you are at the third module iteans that the mainboard might overload the module. Do you have any clue about how it could burn out in all the three istances? This will help to troubleshoot and get to the root cause. I hope your problem is solved once and for all. Let me know. Ciao
Hello Eddie Fuller, thank you for your comment. I will first need to understand a bit more about your trouble in order to give you some help. What do you mean about "won't fire up"? What software are you using, and are you able to connect the machine to the controlling software? if yes are you able to move the machine through the software or it does not respond? If all above is fine, what kind of files are you trying to burn? Let me know Ciao
@@MiddleRoomWorkshop when I say won’t fire up I mean the laser doesn’t shine or burn. It doesn’t show up. I took a image from Google and imported it and it worked perfect. Now it just won’t send the laser. Everything else works perfect.
Hello Eddie Fuller, thank you for your feedback. Are you using the NEJE app? if yes, may you try to install LaserGRBL, there we can understand if the Microcontroller is the problem. You can get the software from here lasergrbl.com/download/ Once you download it, close the NEJE app, launch LaserGRBL, try some of the COM ports available, and click on connect, this should read your machine right away, than you can import any image and try just to see if you get the laser output. Let me know if you need some extra assistance and what is the outome, Ciao
Hello Alejandro Vanegas Vega, Thank you for your comment. There is no easy answer to your question, but I tried to reply as best as I could to reply another comment about a month ago, and I am pasting it here for you to read. The point is also that it depends on what you need to do with the machine. It is not an easy answer as there are many variables, and all is by lack with these cheap engravers. Anyhow, I have personal experience with the NEJE master 2s Plus which is the smaller brother of the NEJE master 2s Max. I can tell you that is okay. You are only limited by the software, which yet kind of does all you might need, just there is some workaround, and if you have the budget, you could get LightBurn, and your limitation are over. From what I can see, the other three models are pretty much the same, coming in different designs. Laser module; Comparing the base module, the Neje is the most powerful optically at 7.5w; however, the other 3 machines came with FAC lens, which is more efficient and focuses the laser into a narrower point making it somewhat equivalent in power despite being 5 to 5.5w. Frame: The best frame, in my opinion, is the Totem S 40w; even if it has more plastic components, it comes with a cool mechanism to easily adjust the height of the module, i.e., the focus. The Atomstack A5 Pro is also good, especially if you need to put thicker stuff under as it has greater clearance; however, the height adjustment is a bit trickier with 2 screws. Note: the device shown on the website is unwired. The Artur Laser Master 2 Pro has some fantastic reference metrics in the frame but is the messiest, and it requires the cable in the front. The good feature that should be in the other machines is the emergency stop. Software: Despite it not being great Neje is the only one to offer native software out of the box, and it has a smooth and easy set-up so far, as for the other I personally do not like to work with benbox, and I limit LaserGRBL for picture only as it offers more options than the NEJE one. Engraving: The smaller square spot created by the module with FAC lenses is way clearer and precise than C-lens, so I give this to the other 3 machines; however, if you go with NEJE A40640 dual laser with FAC Lens and 15w optical power, you will be able to do all you need. (by the way, stay tuned as I ordered one for upgrade) For metals, it seems like the Atomstack is the one. The answer is not easy, so I cannot really give you a verdict since I do not have experience with the other 3 machines. I hope this helps. Ciao
@@MiddleRoomWorkshop thank You for the extensive answer 👍. I live in México and not speak English only can read a little English technical about CNC láser. I am FIAT technician and i AM beginner un CNC business and i want to Buy a CNC láser for graving identification tags for Cats and diga and MDF and Wood. I unterstand almost the 70/% of your explication un your videos 👍
Hola Alejandro Vanegas Vega, hablo poco de español. Tua pregunta no es facil porque hai tantas variables, pero para hacer lo que dices (engraving tags of MDF and Wood), una de las pequeñas maquinas Neje o Artur esta bien. No estoy seguro de si el español es como el mexicano, pero creo que esta cerca. Espero que te aude. Ciao
Neje does sell driver boards in their online shop. Electric motors being driven are acting as generators. Simple fact. Electric cars use that effect and that generated current to regenerate/charge batteries when breaking. Now to be honest I am not really sure that your claim is correct. Mosfet transistors die. That is not uncommon thing. Most due due to the lack of cooling or to high current while they are working. Or they die because they have had some manufacturing issue abd were partially defective. It is pure magic how much current those SMD mosfets and power stages can handle nowdays. They are actually very resilient to. Can handle peak power in short periods. You have power stages that are 7x7 millimeters that can handle nominally 105 Amperes. Impossible to cool at that current so continuously they are used at 20 to 30 Amperes. SMD components are cooled true the PCB and with Airflow. Fan on the top of the laser has a task to cool the laser module and electronics to. Though remember that if the surface is dirty and covered by layer of dirt that came from the smoke, Airflow will not efficiently cool dirty components. It cools the dirt and dirt acts as isolation. So airassist is crucial thing if you do anything with a laser that generates smoke. I have few laser engravers. Oldest Neje is a first Neje Master with 7 Watt Electric consumption module. 10 and 20 Watt's versions were not available. That one moved a lot and bit X and Y axis were moved many times when it was off. Just few days ago I was showing my machines to my friends and they have asked about it and I have explained it. I have even moved it as fast as it goes just to show them how it generates the power. Did do the same with my Neje 2S with N40630 module and there even LED's on the mainboard light up. So what dies that tell you? Brushless motor if the fan is turning and LED's light up? Can LED light up when powered with reverse polarity? Can fan brushless motor power up with reverse voltage? Pretty sure every diode will work only in one orientation. Brushless fans work only in one direction to. More so I kind of think that Neje did something for it while moving same step motors in both directions spin the fan. Normally I would expect electric motors to make one polarity in one direction and the other in the other direction. I am pretty sure that one can't generate more power by moving it then what power supply delivers during an operation. Especially while laser does not even light up. Now one things is sure. None of the electronics like wrong polarity. Wrong polarity kills all sorts of components. But due to the fact that fans rotate and LED's go on somehow does tell me that it is good polarity. So I am pretty convinced something else killed your driver circuit. I have to say I can be wrong to. I am aware of it. I might even disconnect the laser and measure the voltage polarity generated by moving stepp motors. Something tells me it will be OK though. Like with all tools one should take care of them. Using Airassist is way to care about your laser module when you do anything that makes smoke when being marked, cut or engraved.
Hi NINEWALKING, thank you for your comment. I will try to be as short as possible. The stepper motors produce electricity if manually driven, and you can output more power than what is safely designed to work. The motor will offer a top speed while electrically driven, but that does not mean that the top speed cannot be overcome if driven mechanically, therefore producing more power (generally higher voltage). About the reverse polarity, since the stepper motor has no collector like a DC generator would, it means that AC current will be produced, which in turn with some diode will be able to supply half wave electricity no matter the direction of turn to the circuit. I am sure that spinning the stepper fast enough can fry some components either by over voltage or current, whichever the component is more sensitive to. My assumption about the MOSFET was given because it was the only component with something not right, however, if you watch my followup video, I find out that the problem was the small microcontroller next to it. Cooling also affects electronics, but the thermal protection built in should prevent thermal failure during operation. EDIT When I got the damage, NEJE was not selling the driver yet; they started selling them about 6 months later. I have finally purchased and replaced it on mine. th-cam.com/video/W3FDWGTS6eo/w-d-xo.html Ciao
@@MiddleRoomWorkshop What are you even trying to say? Just forget it. Do what you want. If you want to make progress learn more. Especially English language. It is impossible to watch it.
@NINEWALKING I do not quite understand the point of your comment. I am open to constructive criticism and exchange of opinion, but your last comment is not very mature. If you disagree with people's opinions, you can debate and discuss. Your statement about my English is rude; perhaps you may want to try to exchange in my language or one of the other four languages I speak. Last but not least, if you do not enjoy my channel's content, please feel free not to watch. Ciao
Hello baba sid ahmed, thank you for your comment. Lenses cleanliness definitely play a big role in lase machines, but in order to answer, I need to understand what do you mean by wide and accurate. If you have the laser at the right focus, and the line is not perfectly clean showing varying thingness along, then simply clean your lens- blow on them with a bit of air just to get dust particles and then with cotton buds and a bit of alcohol. I clean less will also require more power than usual to cut through the same thinkers of material, so you may try that as well. If you are facing a different problem try being a bit more descriptive so I can troubleshoot the possible causes of your problem. Let me know, Ciao
So basically, the step motor acted as a generator and fried the mosfet component. Thank you for the warning! 🙏🏻
this is an important find that neje and ortur should immediately start working to fix on their frame circuitry! way to easy to overload the most expensive component of the system. I have not heard anyone else talk about this, you deserve a medal! perhaps an interim fix would be to put a manual disconnect switch atop the laser module?
Hello John Wayne Williamson, thank you for your comment and compliment.
Yeah, I think that a switch on the module will help, but they should add the protection at the base including some diodes correctly dimensioned.
Ciao
Same exact thing happened to me on my brand new Sculpfun S9 on my first day. Sculpfun sent me a new control board which did not fix the problem. I'm sure I did this while manually moving the XY axis. Great work. Now I know what to do.
Well, this is not a small issue, and it can not be fixed by firmware update. I think Neje should be the first who offers a solution for this especially under warranty time. I just bought the machine 2 weeks ago. So i owe you big thanks to this warning. I will also follow you especially about this subject, because i am sure someone sooner or later will comes up with a hardware solution.
You also have it on all 3d printers and other devices because motors can also be generators that's why you have to move the axis slowly so it doesnt generate power to the point of burning something on the circuit..
Excellent description and a great public service announcement, thank you!
Thank you so much for working this out! I had the same issue when I went to use my laser today. Thanks to your advice, I disconnected the laser module and found that the device was then correctly initialized, so I will be ordering a replacement module.
The last time I used my laser, on 12/24, I left it unsupervised for a little while and when I got back to it, I found that it was stuck in a position - I believe a guest mistakenly blocked it from moving - and had burned through the 4mm thick wooden Christmas tree ornament and had etched the stone tile beneath it. I'm lucky the stepper motors seem to be fine, but I'm sure that shortened their lifespan.
Hello Notashroom, thank you for your comment.
I am sorry to hear that. Most probably, the heat generated by the fire damaged the circuitry inside, the positive side is that nothing in the surrounding caught on fire.
CIao
thank you very much for the good information
I hope the module will be repaired soon.
I am using the same model
I also thought that reverse current flows when the axis is moved by hand.
Thanks to your video, I have prevented the same problem from happening.
I'll have to put the NEJE software at the origin and turn the power off like when the NEJE software was first run.
May I ask you one question?
When the power button is pressed once and when the power button is pressed twice
And do you know what the difference is when you press and hold?
Hello Bebepapa, thank you for your comment.
I will try to repair the module, but in the meantime, I have the 40W module.
In regards to your question, the function of the button depends on the state of the machine i.e., ON, OFF, WORKING.
- If you push it once while the machine is plugged in but is off, it will power the machine on (off means that the laser does not shine)
- If the machine is on, i.e. the laser shines then: a single push send the machine home, once more and send the machine to the latest engraved position, once more and it starts engraving the previous job (apparently the machine has some memory).
- If the machine is working, one click will pause the machine, click again and it will resume.
- Two clicks it seems to do nothing
- Holding for a few seconds shuts the machine off (only the laser)
I do not use that button, but it does something.
I hope this is helpful.
Ciao
Thanks for this important info, I have a Neje 40W master 2S plus my selfe, and i have been wondering about that fan moving , i will be moving it a bit slower from now on !
Thanks for the work you did trying to figure out the problem.
I thought if maybe you lightly touch the fan with your finger to prevent it from moving while
you position it on the x,y axis, it would not spin the fan and create a current flow.
I started up my machine, but noticed that the fan does not move at all while manually moving the module around the
x,y axis. Maybe this was a fault of only some machines?
Hello Lance Davies, thank you for your comment.
The current is generated by the stepper motors, i.e. the one responsible for moving the axis which is set to rotate as we move the axis manually. The fan spins because it is energized by that current coming from the stepper motors.
I would not suggest stopping the fan.
Anyhow, I am not sure if this is a flaw of some machines only, in my view the reverse current protection is not included in the design at all.
Ciao
I was told when I purchased my 3D printer I should not move the hot end by hand and if I had to move it to move it very slowly, looks like it goes for the Laser module as well.
Great video. who did some mod?
Thanks for this am soon going to order the 80w module based on reviews. Am concerned though about there support I actually wrote an email to Neje and although they replied very quickly non of my questions were answered so a waste of time. Your video has really helped though thanks
The 80w laser arrived and after a brief test this thing is very powerful. Using the supplied test board I set the laser at 4% and tried on corrugated card and it drew a perfect picture without any burn smudges. Tomorrow will be installing on my home built 400mm x 400mm frame. I was lucky as well the item was delivered without intervention by customs.
So I have the same issue u have no ive been using neje 30w for 1 year cna I just get another 30w module in amazon and connect and hood to go? I diag the same as you I unplug the reed wire and worked fine the moment I fought the laser connections it’s stoppers and started blinking
I bought an NEJE 4 e80 still never used, is it normal that the module already smells like burnt electronic? like when you fok up a drill for forcing and heating too much.
Thank you
hello guy. thank for the video
i have the same problem with my laser module that i use only one time. should i buy another one to solve the problem?
Hello Adama Thiam, thank you for your comment.
Hopefully is not the case but let's try to isolate the problem.
Try to disconnect the module and see if the machine initializes and connects with the computer, then try to send an engraving job and check if it works, I mean just the movement.
If the above goes well then the module is most certainly gone.
Let me know.
Ciao
@@MiddleRoomWorkshop Hello . I did what u said me to do. now, my machine works well and i just replace the module with a new one. Thx a lot
Thank you for this informative video.
I did a mistake today.
It's working voltage are 12 and ortur master 2 Pro operating voltage are 24 and today I connected neje 30 watt Laser module with it its blow up. Can you help me how to repair it.
Hello Atif Ali, thank you for your comment.
I am sorry to hear that, I am afraid that multiple components might have to get damaged.
In order to understand the extent of the damage, you'll need to open the module paying attention to don't tearing apart the connectors on the inside, then you will be able to examine the board looking at components that simply look burned or not perfectly right.
There is no rule of thumb here. In my board the MOSFET seems to have taken the hit but yet I am not 100% sure that is the only component. By the way, I receive the replacement MOSFETs and I will try soon to fix the laser.
Let me know if you find out more, eventually, you could share in private the pictures of the board to my email: info@whathowwhysolution.com so I can try to see what component might have been affected.
Ciao
Good afternoon! Thanks for this video! I have the same problem ((( The laser module burned down after manual movement. I disassembled the module, but I didn't see any signs of damage, and the electronic element that you talked about in the video was initially unmarked. Do you know what this element is and what it can be replaced with? Is he really the problem? you said that you got transistors, did you manage to repair the laser module? I do not understand circuit design and therefore I ask for your help! Additionally, I wrote to your email, thank you!@@MiddleRoomWorkshop
photo of the board of my laser module drive.google.com/file/d/1uoSgdRW8vUP5_7ogTq-ZI3sMOa_D996t/view?usp=sharing
hi, i have been using 2s max for about 5 months. My laser module broke down and was replaced with a new one, but now I cannot use it with any application other than the neje application. i have lightburn and laser gbrl connection problem. When I try to connect, the blue light on the module disappears. what should I do? thanks
Hello NİDA MELEK KURTOĞLU, thank you for your comment.
The laser module on its own should not affect the connection with the PC by any means unless you did not replace the Mainboard as well.
The machine runs in two modes, either NEJE mode using their proprietary software and you will see a blue LED on, or in GRBL mode using the other software like LightBurn and Laser GRBL in which case the blue light should go off and a yellow or orange should go on.
Did you perform some updates after the replacement?
Have you tried checking whether when you close the NEJE app, the app actually stops running in the Task Manager?, try to check that or restart your PC altogether. If this does not work you suggest you re-install the CH340 Driver using LaserGRBL from Tool > Install CH340 Driver.
Let me know how that goes and we can investigate further.
Ciao
I can't cut 3mm with neje 30 watt. I don't know why.
Thank you.
Could I disconnect the module before homing just to be sure?
Hello Mark Gopie, thank you for your comment.
Yes you can, but you will damage the connector in the long run, rather before powering down push the red button located in the motherboard to home the axis, than you can power down the system.
I hope it helps
Ciao
I am on my 3rd module in 3 weeks... My issue is that the diode power has just dropped off to virtually zero.
Hello Keith Armstrong, thank you for your comment.
If you are at the third module iteans that the mainboard might overload the module.
Do you have any clue about how it could burn out in all the three istances? This will help to troubleshoot and get to the root cause.
I hope your problem is solved once and for all.
Let me know.
Ciao
So I just got the laser machine last week. I was able to use it yesterday and now today it won’t fire up. What help can you give me with this.
Hello Eddie Fuller, thank you for your comment.
I will first need to understand a bit more about your trouble in order to give you some help.
What do you mean about "won't fire up"? What software are you using, and are you able to connect the machine to the controlling software? if yes are you able to move the machine through the software or it does not respond?
If all above is fine, what kind of files are you trying to burn?
Let me know
Ciao
@@MiddleRoomWorkshop when I say won’t fire up I mean the laser doesn’t shine or burn. It doesn’t show up. I took a image from Google and imported it and it worked perfect. Now it just won’t send the laser. Everything else works perfect.
Hello Eddie Fuller, thank you for your feedback.
Are you using the NEJE app? if yes, may you try to install LaserGRBL, there we can understand if the Microcontroller is the problem.
You can get the software from here lasergrbl.com/download/
Once you download it, close the NEJE app, launch LaserGRBL, try some of the COM ports available, and click on connect, this should read your machine right away, than you can import any image and try just to see if you get the laser output.
Let me know if you need some extra assistance and what is the outome,
Ciao
Thanks I think this happened to me.
What brand it's better than Neje?
Hello Alejandro Vanegas Vega, Thank you for your comment.
There is no easy answer to your question, but I tried to reply as best as I could to reply another comment about a month ago, and I am pasting it here for you to read.
The point is also that it depends on what you need to do with the machine.
It is not an easy answer as there are many variables, and all is by lack with these cheap engravers.
Anyhow, I have personal experience with the NEJE master 2s Plus which is the smaller brother of the NEJE master 2s Max. I can tell you that is okay. You are only limited by the software, which yet kind of does all you might need, just there is some workaround, and if you have the budget, you could get LightBurn, and your limitation are over.
From what I can see, the other three models are pretty much the same, coming in different designs.
Laser module;
Comparing the base module, the Neje is the most powerful optically at 7.5w; however, the other 3 machines came with FAC lens, which is more efficient and focuses the laser into a narrower point making it somewhat equivalent in power despite being 5 to 5.5w.
Frame:
The best frame, in my opinion, is the Totem S 40w; even if it has more plastic components, it comes with a cool mechanism to easily adjust the height of the module, i.e., the focus.
The Atomstack A5 Pro is also good, especially if you need to put thicker stuff under as it has greater clearance; however, the height adjustment is a bit trickier with 2 screws. Note: the device shown on the website is unwired.
The Artur Laser Master 2 Pro has some fantastic reference metrics in the frame but is the messiest, and it requires the cable in the front. The good feature that should be in the other machines is the emergency stop.
Software:
Despite it not being great Neje is the only one to offer native software out of the box, and it has a smooth and easy set-up so far, as for the other I personally do not like to work with benbox, and I limit LaserGRBL for picture only as it offers more options than the NEJE one.
Engraving:
The smaller square spot created by the module with FAC lenses is way clearer and precise than C-lens, so I give this to the other 3 machines; however, if you go with NEJE A40640 dual laser with FAC Lens and 15w optical power, you will be able to do all you need. (by the way, stay tuned as I ordered one for upgrade)
For metals, it seems like the Atomstack is the one.
The answer is not easy, so I cannot really give you a verdict since I do not have experience with the other 3 machines.
I hope this helps.
Ciao
@@MiddleRoomWorkshop thank You for the extensive answer 👍.
I live in México and not speak English only can read a little English technical about CNC láser.
I am FIAT technician and i AM beginner un CNC business and i want to Buy a CNC láser for graving identification tags for Cats and diga and MDF and Wood.
I unterstand almost the 70/% of your explication un your videos 👍
Hola Alejandro Vanegas Vega, hablo poco de español.
Tua pregunta no es facil porque hai tantas variables, pero para hacer lo que dices (engraving tags of MDF and Wood), una de las pequeñas maquinas Neje o Artur esta bien.
No estoy seguro de si el español es como el mexicano, pero creo que esta cerca.
Espero que te aude.
Ciao
Neje does sell driver boards in their online shop. Electric motors being driven are acting as generators. Simple fact. Electric cars use that effect and that generated current to regenerate/charge batteries when breaking. Now to be honest I am not really sure that your claim is correct. Mosfet transistors die. That is not uncommon thing. Most due due to the lack of cooling or to high current while they are working. Or they die because they have had some manufacturing issue abd were partially defective. It is pure magic how much current those SMD mosfets and power stages can handle nowdays. They are actually very resilient to. Can handle peak power in short periods. You have power stages that are 7x7 millimeters that can handle nominally 105 Amperes. Impossible to cool at that current so continuously they are used at 20 to 30 Amperes. SMD components are cooled true the PCB and with Airflow. Fan on the top of the laser has a task to cool the laser module and electronics to. Though remember that if the surface is dirty and covered by layer of dirt that came from the smoke, Airflow will not efficiently cool dirty components. It cools the dirt and dirt acts as isolation. So airassist is crucial thing if you do anything with a laser that generates smoke. I have few laser engravers. Oldest Neje is a first Neje Master with 7 Watt Electric consumption module. 10 and 20 Watt's versions were not available. That one moved a lot and bit X and Y axis were moved many times when it was off. Just few days ago I was showing my machines to my friends and they have asked about it and I have explained it. I have even moved it as fast as it goes just to show them how it generates the power. Did do the same with my Neje 2S with N40630 module and there even LED's on the mainboard light up. So what dies that tell you? Brushless motor if the fan is turning and LED's light up? Can LED light up when powered with reverse polarity? Can fan brushless motor power up with reverse voltage? Pretty sure every diode will work only in one orientation.
Brushless fans work only in one direction to.
More so I kind of think that Neje did something for it while moving same step motors in both directions spin the fan. Normally I would expect electric motors to make one polarity in one direction and the other in the other direction.
I am pretty sure that one can't generate more power by moving it then what power supply delivers during an operation. Especially while laser does not even light up.
Now one things is sure. None of the electronics like wrong polarity. Wrong polarity kills all sorts of components.
But due to the fact that fans rotate and LED's go on somehow does tell me that it is good polarity.
So I am pretty convinced something else killed your driver circuit.
I have to say I can be wrong to. I am aware of it.
I might even disconnect the laser and measure the voltage polarity generated by moving stepp motors.
Something tells me it will be OK though.
Like with all tools one should take care of them. Using Airassist is way to care about your laser module when you do anything that makes smoke when being marked, cut or engraved.
Hi NINEWALKING, thank you for your comment.
I will try to be as short as possible.
The stepper motors produce electricity if manually driven, and you can output more power than what is safely designed to work. The motor will offer a top speed while electrically driven, but that does not mean that the top speed cannot be overcome if driven mechanically, therefore producing more power (generally higher voltage).
About the reverse polarity, since the stepper motor has no collector like a DC generator would, it means that AC current will be produced, which in turn with some diode will be able to supply half wave electricity no matter the direction of turn to the circuit.
I am sure that spinning the stepper fast enough can fry some components either by over voltage or current, whichever the component is more sensitive to.
My assumption about the MOSFET was given because it was the only component with something not right, however, if you watch my followup video, I find out that the problem was the small microcontroller next to it.
Cooling also affects electronics, but the thermal protection built in should prevent thermal failure during operation.
EDIT
When I got the damage, NEJE was not selling the driver yet; they started selling them about 6 months later. I have finally purchased and replaced it on mine.
th-cam.com/video/W3FDWGTS6eo/w-d-xo.html
Ciao
@@MiddleRoomWorkshop What are you even trying to say? Just forget it. Do what you want. If you want to make progress learn more. Especially English language. It is impossible to watch it.
@NINEWALKING
I do not quite understand the point of your comment. I am open to constructive criticism and exchange of opinion, but your last comment is not very mature.
If you disagree with people's opinions, you can debate and discuss.
Your statement about my English is rude; perhaps you may want to try to exchange in my language or one of the other four languages I speak.
Last but not least, if you do not enjoy my channel's content, please feel free not to watch.
Ciao
Please help me.
My NEJE 40 laser has become too wide and inaccurate.
Although the settings are set, Can the problem be from Cleanlines؟
Hello baba sid ahmed, thank you for your comment.
Lenses cleanliness definitely play a big role in lase machines, but in order to answer, I need to understand what do you mean by wide and accurate.
If you have the laser at the right focus, and the line is not perfectly clean showing varying thingness along, then simply clean your lens- blow on them with a bit of air just to get dust particles and then with cotton buds and a bit of alcohol.
I clean less will also require more power than usual to cut through the same thinkers of material, so you may try that as well.
If you are facing a different problem try being a bit more descriptive so I can troubleshoot the possible causes of your problem.
Let me know,
Ciao
Thanks for sharing.