
Camera / LED brightness on Neptune 4 MAX
As you may see the it’s too bright!
Anyone knows how I can either turn the brightness of the camera down a bit, or the Toolhead LED?
Many thanks
Neptune 4 Max

As you may see the it’s too bright!
Anyone knows how I can either turn the brightness of the camera down a bit, or the Toolhead LED?
Many thanks
Neptune 4 Max
Like this video
Just sharing the idea. You guys might need a stronger one.
I understand this has been discussed before but just asking the same question again in mid 2026.
Can we control the observation light through Fluidd?
I have modified the original printer.cfg, corrected the labels names so it can show correctly in the UI, however I tried everywhere couldn’t find the right PIN code for top light.
As discussed before for Neptune 4, I tried PC7 is not right and you don’t want to mess that, it controls a fan inside machine switching on and off automatically.
I tried LED1 and LED labeled on motherboard diagram, neither is correct, they must use internal code different from the label.
Anyone has any answer?
Elegoo should let us know it as this is a very useful part of UI
So anyone has any information? I’m away from home using the extruder light looking at the printed result, just too dark. 🤣
I'm having problem update firmware
In the instruction file from downloaded unzip file, it says to place the ELEGOO_UPDATE_DIR folder on the root folder on the usb.
However, while I plug it in the USB and try to start the update process, it says cannot find the firmware files in the root directory of the USB drive.
I actually tried them both, all failed.
Any one have any idea?
Thanks.
4Max, any one can give an instruction on how to put these on? Many thanks.
Is that possible to connect the fan to a relay, and then to a small relay then to a device, i.e the LED light. Then each time when we finish a code can automatically turn off the LED together with the fan, so the machine is in idle quietly.
When we try to do anything— heat up the bed, load filament, print, etc, it automatically turn on the LED, as well as the Fan.
In this way I can quietly idle the machine.
Since recently I read lots of discussion about bed levelling. As a new guy to 3D printing here comes a question in my mind.
Given an assumption, that there no absolute flat and perfect bed, we are all dealing with “bent, wrapped, or uneven bed right?
The calibration process then, what does it do? My understanding is that it record how the bed bends, and adjust the z position during printing, so the first lay my do its best to flatten sticking to the bed.
In this case, what happens to the second layer? Then third, fourth…… in the end are we getting a wrapped or bent printed item? Is the last layer really flat?
Further more, instead of adjusting z position, why don’t the printer adjust the extruding amount, so more materials are placed to fill up the “holes” then produce a relatively flat surface ready for second layer and above? In the end we getting a perfect flat top layer as well, with a minimum affected print(only the so called bent first layer?)
Any thoughts?
Anyone tried the professional mode of calibration? It’s hidden in the setting menu.
How is it?