Its_All.Lost
Because hope just breeds everlasting misery…

Elegoo Neptune 4 Max

Elegoo Neptune 4 Max

(UPDATED)

Let me start all of this with I am not an engineer nor an expert at 3D printing. This is all just shit that I have picked up over the years, read about or came across. I just want to spread some information and maybe help someone. Try the following at your own risk, I am not responsible for what you do. Don’t believe everything you read on the internet.

 

Intro

A month or so ago I upgraded my trusty old Monoprice Maker Select v2.1 to a Elegoo Neptune 4 Max. Wow. I’ve been printing non stop. This thing is a beast! Its freaking huge and it prints fast! My Monoprice is still going strong, and I actually gifted it to my son-in-law, but I needed a bigger build platform and I wanted speed. It was down to an Anycubic Kobra 2 Max or the Elegoo Neptune 4 Max. If you do your research you will find tons of posts of people that got the N4M and hated it, to return it and get the Kobra 2 Max. With just as many people who did the opposite and ended up sending the Kobra 2 Max back to get a Neptune 4 Max. I was sold on the fact that it runs Klipper. It may be an Elegoo version of Klipper but it is Klipper. There are people working on OpenNept4une, a firmware replacement for Elegoo’s Klipper. I have also heard that someone is working on a pure Debian version of community Klipper. That would be fantastic. Unfortunately this requires buying a USB to eMMC adapter to flash the machine which I don’t have. I have not done this yet and I am not sure if I will. But it is an option. You can find more information on the Elegoo Discord. Some are also upgrading the main board to something like a BTT Manta and Pi TFT50. One of the things I’ve heard when playing with the alternate firmware(s) is you may lose the functionality of the touchscreen, no bueno.

If you are new to printing or this is your first don’t expect a nice fat user manual or handbook to walk you through. You are going to have to survive off a collection of online help. Don’t expect to get a ton of super helpful customer support from a company in China like Elegoo. You are much better off on their Discord or in a Facebook group, and websites.

Even with my knowledge of the past few years it took me almost two full rolls of filament to get it dialed in. But now it prints beautifully every time, and fast. So expect to be tweaking your profile for a bit and doing lots of bed leveling and printing lots of first layer sheets and benchys along with XYZCubes. Run the tests, it helps.

The following is a mash up of some tips I have tried and figured out, or I have read about and found online.

Some of these steps may seem tedious or you just don’t want to do them, but it will save you time, headache, and filament – which is money. When I first started out for the longest time I never wanted to “waste” time with the calibration prints. Trust me you waste more time by not doing them. Orca makes it easy now anyway.

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Drop CTRL finally gets VIA support (unofficially)

Drop CTRL VIA Support

I was digging through Github one fine evening because well I don’t remember why and I ended up on QMK, the firmware used in most (decent) mechanical keyboards. I noticed that VIA support was added for the Drop (Massdrop) CTRL, the ALT already had VIA support. Hey, I have a Drop CTRL! So I decided to I wanted to flash the board and get VIA support. Who doesn’t want VIA support? Down the rabbit hole I go, and I tossed in some extras.

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Wanhao Maker Select v2.1 Firmware Upgrade

Wanhao Maker Select v2.1 Firmware Upgrade

It has been a while since my last post, I have not been fiddling with “blinking lights” for a little while now. I got a dog and life just happens. But I have felt the itch lately and decided to jump into some shit tonight – upgrading the firmware on my Wanhao Maker Select v2.1! There are no actual guides that I have found to be able to follow to flash the firmware (for this particular make/model). All of the information is out there but it seems to be mostly on Reddit and it is scattered across a few posts. Most of what I have found links to two guides; a YouTube video of how to flash the bootloader to the Melzi board, and an Instructables on how to do the same thing. That is basically all you really need but it came off as confusing to me so I am sure it will to someone else as well.

Basically what you need to do is a 2-step process. 1) Flash a bootloader to the Melzi board, and then 2) Flash the actual firmware to the Melzi board. You WILL NEED an Arduino of some sorts, any Arduino should do. I used a Duemilanove and it worked, and that thing is old. You will also need six (6) jumper wires (male to female most likely). You need to connect the wires from the Melzi board to the Arduino so you will also need to take the control box apart. You only need access to the Melzi board to flash the bootloader. Once the bootloader is flashed you can pack it all back up. The firmware is flashed via the Melzi’s USB port. So lets get to it!

Your Arduino IDE should be up to date and you will need the Sanguino board installed as well as the U8glib library (There is a different/older version linked to in the YouTube video, 1.14).

  1. Take the control box apart, I left the Melzi board in the can, you don’t need to fully remove it, less you want to. You just need access to the pins and the LCD.
  2. Put the auto-reset jumper on if you have it removed.
  3. Change the board power selector from VREG (AC) to USB, this lets us power the Melzi from the Arduino.
  4. Unplug the LCD (it will mess up the bootloader flashing process I have read, no harm in removing it temporarily. I also had issues until I unplugged the heatbed MOSFET also).
  5. Connect the wires from the Arduino to the Melzi.
  6. Connect the Arduino to the PC/Mac.
  7. Flash the Arduino to be used as an ISP.Open the example: ArduinoISP
    I had to add a line to get the flashing process to work, this may be due to the old Duemilanove I am using.
    I had to add #define USE_OLD_STYLE_WIRINGBoard: Your Arduino type Port: Your correct Arduino port Then click upload
  8. Now flash the bootloader (after you change the board settings).Board: Sanguino Port: Your same Arduino port Programmer: Arduino as ISP Then click Tools > Burn Bootloader
  9. Remove the Arduino from the PC/Mac, and remove the wiring from the Arduino to the Melzi. The Arduino is no longer needed.
  10. Place the jumper back on VREG not USB.
  11. Plug the LCD back in.
  12. Put all your crap back together (or leave it apart to make sure it all works!).
  13. Plug AC power back in.
  14. Plug the Melzi into the PC/Mac (change the board settings again).Board: Sanguino Port: the port of the Melzi board Programmer: AVRISP mkII Flash/upload the new firmware
  15. Print something!

Thats the whole process. The part everyone leaves out is how to flash the firmware, even though it is dead simple as plugging in a USB cord it is never mentioned. Something also never mentioned is how to configure Marlin to work on the Maker Select. The default Marlin is too large to fit, some things must be removed. I have not found a guide on how to configure it and or what to configure. But I did find a pre-set Marlin configured already for the Maker Select. This is what I am using. You have a few choices as far as I know; Marlin, Repetier and TH3Ds Marlin.

Update: Something I feel I didn’t make clear was flashing/updating the firmware. Step 14 above is the flashing part. Flashing the firmware the first time (after your bootloader is installed) is the same as flashing the firmware with future updates to your printer. With the printer in normal running condition, turn on the AC power. Connect your printer with the Arduino IDE open to your printer. Maker sure the board selected is Sanguino and the port is the port of the Melzi board that appears with the programmer: AVRISP mkII. Then with Marlin.ino open (or whatever firmware you’re using) select upload (or verify first to make sure it will compile). The firmware should upload and you should be good.

I chose the Marlin firmware preconfigured for the Maker Select v2. But I ran into an issue with the LCD screen being garbled. I also believe this is just a general Marlin firmware issue with Maker Selects and not just this specific version. But no fear! I found the fix online!

You need to edit a file in Marlin.ino, specifically ultralcd_st7920_u8glib_rrd.h around line 86 add the 2 NOP, this will fix the garbled LCD:
(You only need to do this if you LCD screen is garbled after flashing Marlin!)

This is the Reddit that I kept coming across: https://www.reddit.com/r/3Dprinting/comments/8o3wg8/installing_marlin_on_maker_select_v2/
This is the video on flashing the bootloader that seems to be popular: https://www.youtube.com/watch?v=ejpSniiJejI
This is the Instructable that shows the same thing as the YouTube video: http://www.instructables.com/id/Using-an-Arduino-to-Flash-the-Melzi-Board-Wanhao-I/
This is where I found the LCD fix: https://www.reddit.com/r/3Dprinting/comments/9i0n6z/maker_select_v2_lcd_issues/

Link to Sanguino board
Link to the U8glib library
Link to the preconfigured Marlin 1.1.x for the Maker Select v2.1

Some useful Thomas Sanladerer videos I found after I did my upgrade 🙁
Configuring thermal runaway
How to setup Marlin firmware

This was how I did it on my printer, I take no responsibility for anything that may happen to yours. Try this at your own risk.