Hello everyone.
I have a NEJE Master 2. I used it for a long time and then didn’t use it for quite a while. Now I’ve unpacked it again and even found videos online showing how to use the endstop in LightBurn with a bit of soldering work.
So I went ahead and soldered the two wires and the capacitor as described in the PDF. Then I powered it on and tried homing in LightBurn. The Y-axis tries to home, but as soon as the endstop is triggered, I always get the error “Alarm 8” and the homing doesn’t continue.
Can anyone help me with this? That would be really great.
I’ve already installed firmware 1.1f using the NEJE GRBL uploader and lowered the baud rate in LightBurn — unfortunately without success.
My board has the number 5, in case that’s important.
Thanks in advance,
GabbaYoda
Hello, friend
Motherboard number 5 is a very old motherboard(at 2020).
I went to check the design files and this motherboard doesn’t support auto-reset in GRBL mode.
However, this does not affect the use, and you will need to manually move the device to the reset position before working.
Of course, you can buy a NEJE 5 control board, the new control board is compatible with your machine, and has more capacity and speed.
You can get the purchase here
Thank you very much for your reply. In this PDF from Neje, there’s a tutorial explaining how to use solder bridges to make the endstops functional, and it also says that my board is compatible, right? According to LightBurn, the endstops are working. Did I possibly read or understand something incorrectly?
have you do this?
Can you provide a screenshot to see?have you do this?
At the moment, I unfortunately don’t have a screenshot because I’m at work. But yes, I did flash the firmware and entered the command in LightBurn. Unfortunately, it’s not working. Is there anything else I can test?
Can your device homing properly in NEJE mode?
How can I start the homing process in NEJE mode?
Your device will automatically homing when it is plugged in, right? (It’s been so long, I can’t remember exactly)
When I home it in NEJE mode, it moves toward the endstops. On the X-axis, this works well. On the Y-axis, however, it jumps back and moves into the endstop again, as if the switch isn’t being pressed properly. When I simulate it by hand and hold it for about one second, it briefly moves in the other direction and then stops. So I think the endstops are at least being recognized.
For the test, I removed the solder bridges. When I add them, the machine doesn’t move away from the endstop. However, when I simulate it by hand, it works.
Does your limit switch pop up and down properly?
Check this link may be helpful to you
Thank you very much for your effort. But I’m giving up. Unfortunately, there’s no logical reason for me why the endstops aren’t working properly. It would have been a nice “nice to have” feature. I’ll just move the laser manually to the homing position. I’ve already invested a lot of time into a feature that I can just as easily handle manually.
I’m an electrician and I build custom machines, so I know how an endstop is supposed to work. I suspect that the endstop signal isn’t properly debounced in software, which might be why the laser isn’t receiving a clean signal — causing those erratic movements.
Why the endstop doesn’t home correctly in GRBL mode, I don’t know. To me, it seems to be something software-related.
Maybe I’ll give it a try with ChatGPT and a self-compiled firmware.
You can try to filter out the signal interference by connecting a 0.01uF ~ 0.1uF capacitor to GND in parallel on the signal line. This may help
