Neptune 4 Pro - A Real Review

Would you still buy it?

Music track: Marshmallow by Lukrembo

#3dprinting #review

[_amandi]

The problem is not with the printer, just recalibrate the resonance compensation, elegoo have put default values for input shaper and it is causing this … I’ve tried it by the way … in the neptune 4 pro and the Voron 2.4 r2 and this was the thing to fix

[eaman]

So do the Skew correction¶

Software based skew correction can help resolve dimensional inaccuracies resulting from a printer assembly that is not perfectly square. Note that if your printer is significantly skewed it is strongly recommended to first use mechanical means to get your printer as square as possible prior to applying software based correction.

[petercallison]

The problem was he did not assemble it properly, he missed the proper screw holes on the uprights. This video needs to be removed.

[charliehorse]

I may have FOUND THE PROBLEM and if this is it, it's easily correctable:

After my first few prints which I was happy with, I noticed one of the towers of the gantry was 3-4 mm further back than the other. Upon inspection, the screws weren't in the proper holes but in the slots of the metal extrusion. While putting it together it didn't seem wrong because the screws tapped their own holes, and it was actually possible to screw it down tight and make fine-looking prints. (As you say, it only matters or "shows up" with some prints.)

The four big screws just happen to fit perfectly into the extrusion slots to tap their own threads, and it's very rigid that way so it's an easy assembly error to make.

[GiulioVonKerman]

i have a Neptune 4 (not pro) and I have no alignment problems. I think it's a problem related to linear rails

[rwilliams]

I watched this video before I bought it as I really didn't know anything about fdm printers, but bought it anyway. Several months later I'm still happy with it and still recommend it. It's my first fdm printer and second 3D printer. I've printed small thread bolts and nuts with no issues getting them to work together. To anyone who is considering this printer, go for it. I'm glad I did. The petty nit picking in this video used to bash it can be said for just about any and every printer out there, even resin ones.

[ajseusa]

I bought a Neptune 4 pro last November and it has worked great for me. I use mine on a regular basis to create functional, structural parts that look as good as any other 3D printer to me. It is my first 3D printer and I have zero experience using another 3D printer. Using Fusion 360 and this printer have allowed me to create many special tools, many custom parts, several custom mounting brackets for GPS, Cell Phones, LED lights and more. Unique custom adapters and many functional/structural parts that work just as good today as they did on day one. Sure I have had to clean, lube, tune and adjust things over time, but as a whole I am still 99% satisfied.

[matthewstrangwood]

i have the non pro neptune 4 and i print for real world accuracy, i have done the firmware upgrade that was offered on the Discord and its fine ! printing parts for Airsoft parts,
at first i was getting odd shaping but that was my own fault for changing the wrong setting in the CFG file for the extruder and the steps per rotation
unless you use a machinist square you cannot say that the axis are misaligned, as its more down to stepper control

[NvrchFotia]

Klipper has a built in skew correction feature. Have you tried tuning that yet?

[ImEmmamnuel]

I have the Neptune 4 pro with the exact same issue, I thought this inaccuracy was normal on all FDM printers since it’s my first one. Please post again if you find a DIY solution!

[frostie_]

Thank you so much for the great review!!!

[erdemokkes]

In neptune 4 pro, the parts that carry the z-axis come very tight. This may cause the x-axis not to work correctly. stepper motor power may cause it to work difficult even if it exceeds this tightness. my advice to you. lower the z axis down and loosen the screws of the coupling, shaft, stepper motor and z axis and tighten them again. do the same thing again by taking the z axis at the top. Finally, the tension belt at the top also comes very tight. These are things that can give a trapezoidal appearance on the z axis and are reflected on the x axis.
You said that the problem is disproportionately caused by the x/y axis. However, since these tightnesses are different, it may have made a difference when the motor stresses and speed are taken into calculation when the part is printed.

sorry for my bad english. ı hope, u can understand

[Darryl_P_]

99.9999% of people won’t notice or care about such a minor deviation. Anybody that wants better precision will buy a proper industrial machine

[Beskar]

Im debating between this and the Ender 3 v3 KE as my first printer. Any advice either way?

[ProgThoughts]

I must say that their customer service has been stellar. Even though they're low on representatives as stated, they still managed to make things right. I may update this comment with further testing results.

Here's everything I've realized about the Neptune 4 Pro.

Printed parts tend to be weaker on this printer than I'd expect. This may 100% be on me, but not an issue I've had before this printer.


*X/Y Axes:*

I've tested a 3rd and final Neptune 4 Pro. Same issue, but with a 0.15-0.2mm variance in diameter for a 15mm cylinder. The other two printers were tuned beforehand, this 3rd one I made the cylinder the first print after bed leveling. I also made sure for the millionth time that the gantry you attach in assembly could not be put on wrong and that I wasn't tightening up any screws that didn't want to go in easily.

*Cura vs Prusaslicer:*

Beautiful and fast prints, but I've had trouble with it. Particularly, the prints from Cura and Prusaslicer are *not* equivalent on this machine and I would recommend Prusaslicer for the Neptune 4 Pro. The only issue I had with Prusaslicer was I couldn't adjust flow, but you can do that from Klipper. The issue with Cura is that the walls of prints sometimes don't seem to stick together, as if printed too far apart (not all prints are obvious, test with a cube with no top surfaces). With Prusaslicer, this issue does not exist and I couldn't find any physical issues to cause this other than the slicer.

*Differences Between Units:*

One unit had a display that was a little odd. It was much dimmer than it should have been and had an extra setting in the advanced setting section called, "Dynamic Speed" or something like that. Quite odd. One machine came with no lubrication on the lead screws, causing a screeching sound during prints that I fixed by adding lube.

That's all.

[nemanjadzepina]

I have it for more than a year now and only thing I replaced was a couple of nozzles... It works perfectly. I'm thinking about buying a bambu lab x1 as an upgrade but this was a perfect first printer for me.

[Xearrik]

Mine is arriving in less than an hour. I've never owned a 3D printer, and I'm trying to figure out what sort of maintenance I should do after receiving an email from Elegoo telling me to grease the rails.

None of the videos I watched about setting it up, said to grease anything. Now I hear about this miss alignment problem. I'll check for alignment when I figure out how to use it lol.

[Zukouis]

so what should i buy i want something the same size or bigger and the same price

[chrini]

Just because you got your delivery driver slam your packages, does not make this a bad printer.

[Rahul]

Sovol SV07 plus vs neptune 4 pro
Where i am from, right now they are at a similar price range. Which should i get?