Neje S2 Max laser module A40640 incorrect cutting on the x-axis. On the y-axis it is ok. I adjusted the focus, I replaced: the board, motors, stretched belts, the result is the same. What is not ok? I use Lightburn.The test is performed on 3mm material, a 10mm / 10mm square, speed 5mm/sec and laser power 90%. As you can see in the attached picture, the y-axis is thin and cuts the material, the x-axis is thick and sometimes does not cut the material. I use and air assistant.
Hi, I have exactly the same problem. It is most probably related with the rectangular shape of the laser dot.
Here I found discussion about it:
I attach the dot shape of my a40640:
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Am I to understand that it’s a manufacturing problem? I’ve only had it for a few hours, bought from Neje…I received it today.
I don’t know. According to their documentation it should be like this:
NEJE A40640 Focus: 0.04x0.06mm
Actually if it is focused properly the results are very accurate, but cutting on X axis is still worse (and needs more repetitions) than on Y axis. That’s why I’m looking for some software tweak, I am sure it can be optimized with some software/firmware changes.
I asked a friend who has the same module (one month old module) to do the same test, the result is different, I think… I have attached a picture.
Can you see the shape of your laser beam (just point it to an object at larger distance)? Maybe it’s a faulty module?
Yes I can see it.
This is what my square looks like, which is actually a rectangle. Do you think it’s normal? I saw that the laser light pulses in the waiting position.
What you’re seeing is the impression of the actual diode array that generates the laser light. This basically looks okay to me but I’m not familiar with your specific unit.
About the light pulsing, do you mean that the light intensity is not steady? Can’t tell you if that’s within normal expectation or not…
I was under the impression that this was just supplemental power but not certain.
I have two Neje A40640 modules.one is 2 years old and the new module is not even a month old. The old module does not behave the same as the new module. The old module light is not flashing.
Okay. In that case the explanation from Neje doesn’t seem correct. They’re implying it’s the refresh rate of your camera that was capturing it that way.
Could it be that the supplemental power is required for the unit to operate correctly?
The power supply is original Neje 12v 4 amps, A40640 is maximum when it is connected directly to the board, the board is S2Max. I also tried with the S2 plus board, the result is the same flashing.
I wonder if it’s possibly related to the PWM frequency. Not certain if Neje firmware allows you to modify that value.
Something is wrong with the new module. The square on the old module is not a rectangle it is a square. They keep saying focus, focus and they said that the new module is focusable. And the old module says in the presentation for sale that it is fixed focus but when I bought an adapter from Neje for air assist, they told me that I had to defocus the lens to install that air assist. So moral???
Which lens do you have on the module, simple or with the protective glass? If you have the protective glass, I removed it and the result of cutting and engraving improved.
Great results, well done!. So, it seemed to be a focusing issue. Yes, the new A40640 is not fixed focus, you can change it depending on whether you are engraving or cutting some thick material.
More comments and analysis I have here.
