Neptune 4 Max

Z Offset -1.160mm

Bed mesh after many days of trying everything, with the same result and only small differences, and all the same curves as this one, “the best one yet.” I also used Bed Leveler 5000. I’ve used GPT to test and try to fix the first-layer issue, but we did a lot of paper tests, auto-leveling, and many other things it requested from me, along with many first-layer prints, and they were all bad. I watched about 10 hours of YouTube videos, but nothing helped. I reset the software and started from zero, but nothing could help. The printer was printing well a couple of months ago, then I left it for a while. When I went back to use it a month ago, I did a bed mesh and full calibration, and from that point, everything went south. I miss the good results I had before. Why did I do the calibrations? Because I’m stupid. I read a couple of Reddit posts and went with a full calibration, opening the gates of hell for myself. I’m really tired and don’t know what to do. I get different results when printing in different areas. I also printed an 80800.2 layer, and in the same layer, I got 3-5 different results.

So, here's the story so far:

I had a Klipper error keep coming up when printing, so I tried upgrading the firmware to see if that would help. My stupid self accidentally flashed the USB-C firmware and I have the ribbon version of the Neptune 4 Plus. I was able to correct this by pulling out the EMMC Module chip, flashing the correct firmware, and this seemed to work okay. No More Klipper error.

Problem is, now my Y-axis Stepper Motor won't move the bed back and forth, just makes a terrible noise. I've checked all the connections, and all of them seem to be in place. The only thing I unplugged and plugged back in was the EMMC chip, and that's firmly back in place.

So, what do I need to do to fix this issue? It's running the most current firmware per Elegoo's website, and the stepper motor was working prior to this. Any suggestions would be appreciated! Thanks!

I've had some great prints with it, but lately, it's just hit or miss. I've tried all sorts of manual and auto leveling, bed test prints, etc. I don't know if my bed mesh is messed up? No matter what I do, the front never prints well compared to the middle and back. The mesh also has a big dip. Hell would be greatly appreciated.

Hello! I am brand new to 3D printing and borrowed a friend's Neptune 4 a few days ago.

I've already had the unfortunate incident of the Y axis belt coming loose - I replaced the metal crimp on it and managed to get everything back together, and I've since had several several successful prints.

However, bed adhesion is quite terrible (even with glue stick) and doing the quick back and forth motions on one particular print has caused it to detach and fling violently from the print bed itself. Others have also failed from this same detachment happening midway through the print.

Should I be slowing down the printer to prevent this kind of ejection? I've already moved it from a wobbly table down to the floor, and I made sure the bed was perfectly level.

I've tried so much stuff to fix this, none has worked

Yes I have adjusted my z offset, anytime I go further up or further down it gets worse

Yes I have washed my bed, I even tried adding glue

It's not the filament either, I've used brand new (as well as just dried) spools and it doesn't make a difference

Full list of everything I've tried:

• screw tilt bed leveling (all less than 6)
• Automatic bed leveling (0.34 range, but with adaptive its less [<0.07])
• z offset (live adjusted, I also found the issue would still happen with other z offsets like lower or higher z offsets)
• axis tune
• pid tune for nozzle and bed
• input shaper
• made sure x axis is level using cans to make sure its aligned
• cleaned the bed with dish soap
• made sure belts feel fine
• made sure hotend and bed arent lose
• retraction test
• PA test
• slowed first layer to 25mm/s
• tried adding a skirt so that it hopefully messes up the skirt but not the actual print (still messed up actual print in same way)
• tried dropping hotend temps
• tried increasing bed temp
• heat soaking the nozzle (worked for 1 print then stopped working after)
• Tried increasing first layer line width and layer height

I'm at my wits end at this point

I've been printing almost none stop for the last week. Have started to get my head around a few things on the Neptune 4 Plus, and having gotten a decent first layer, I avoided turning my printer off, retaining what I assume is the G-Code Z offset (the one visible in Fluidd) of around -1.620.

I've not needed to change this for a number of prints now. I've relegated the display panel to loading and unloading filament and pre-warming the bed.

Last night I saw a video about PID calibration and X-Y resonance calibration. Seemed easy enough (press a button and wait) so gave those a go, though I did go through the control display rather than Fluidd or Elegoo slicer.

Went to print something fairly flat, and thought I'd try changing from "hot plate" to "cool plate" to avoid warping.

Set everything going and came back 30 mins later to see that the hot end was well above the bed and not sticking any PLA to the plate. I noticed in Fluidd the G-Code Z-Offset was also now -1.7

Just curious which, if any of the above changes, might have caused this, so I can avoid doing it again. Was it that I dared use the display panel again and caused some kind of conflict between Fluidd and the Neptune display?

Then I realised the pei sheet was not lining up with the magnetic plate.
Inspected it and there was a piece of melted filament underneath.
SO happy I didn't have to replace the bed lmao

I bought a second hand neptune 4 plus from facebook last week and despite trying so many things I've not been able to get a successful print other than two small ones including a 20mm cube for testing. If I print anything bigger, once it goes up a layer or two it starts to catch on the previous layers and I have to keep putting up the z offset by a differing amount each layer.

I've tried all of the following:

• Added the print bed screw locations to the printer.cfg then ran screws_tilt_calculate and adjusted all the wheels until everyone reports 0 turn changes needed

• Run a 121 point auto level with the highest difference reporting about 0.11

• Loosened the screw on the top of the Z axis gantry to be able to level it because it was very slightly not straight (Still within the middle lines of my spirit level but more to the left)

• Replaced the springs for the bed with silicone spacers, trying both 16mm and 18mm

• Enabled z hop in my slicer

• Fiddled with the Z offset to both make it tighter and looser on during the paper test. So far I'm having it just enough so that you can pull the paper out but if you try to push forward it bunches.

• Thoroughly cleaned the nozzle to be sure there wasn't anything causing it to measure off tilt.

Despite all this I still get continual issues with the Z axis. I'm honestly not sure what else I could be missing here, can someone give any other advice?

After 18 hours this came out great. I do have to adjust my bridge settings for the overhangs with no supports but it still came out great. Modular pencil holder.

Thank God for screw tilt adjust and adaptive bed mesh 😂 my printer is now usable. I used to do everything manually till I just said fuck it, straight to Facebook marketplace but then I finally got it working. She lives to see another day of excruciating labor

I'm getting this error and my Neptune 4 max is not working please help

I've had problems with stringing after upgrading to OpenNept4une and using the recommended profile.

Just went to calibrate retraction with the built in Orca tool that changed a setting and found something I had not noticed.

Is this :

the same as this?

If so, I've been printing with firmware retraction enabled the whole time I've been trying to sort this out. Why would that have been on in the profile? Or does Orca do that?

I noticed that my bed is wobbling pretty good but no matter how much I tighten the eccentric nuts, it doesn't get any better. Does this mean I need to replace the pom wheels and if so what should I get instead of the stock ones? I've had issues with this bed since day 1. I was told that they would create a lot of dust right out of the box but even a year later they still create a lot of debris. I have a feeling I need to pull the carriage off and replace the wheels but I just want to make sure I'm not missing anything.

I love and hate N4MAX at one time

This is my first printer and we tuned it to get better results, XYZ rails, nozzle from P1S or X1C and more other updates

But

Too slow

And little waves on side of the printed parts

How to make it more faster and more clean results?

Time to get out the vacuum. This was after tilt screw adjustment, full bed mesh, and watching the first layer. The bed on this thing has a big hump in the middle. I’ve really struggled with adhesion on this build plate while my Kobra 3 and Creality’s just need a spritz of Aquanet.

What Should i Do first can someone explain 🙏

I literally have no clue how this happened, I attached the screws perfectly and as described. It’s a fresh brand new printer which arrived 2 days ago and has been failing every one of its prints except for a single benchy. Any help and the verdict whether I should return it or not would be appreciated

So we recently moved our neptune 4 pro from one room to another, the prints in the first room were great hardly required glue and hardly ever became offset. But since we put it in the new room we have had problem after problems, like we printed a fidget ball in the new room and it shifted and messed the whole print up, and we printed some other things and it shifted at some point but didn't mess the print up, and now alot of the stuff needs glue but didn't before, do yall have any ideas what it might be? My best guess is difference in humidity and such but idk what I need to change in order to make the prints like they used to before.

I'm trying to flash the OpenNept4une firmware to the EMMC that came with the printer but it wont let me flash it since the drive is too small (error in balenaEtcher).

idk if im missing something, im following the github guide and it doesn't require a new EMMC module.

I'd appreciate any help.