Wanhao i3 32bit upgrade

Maker Select 32Bit Upgrade

I decided to make the jump to 32bit printing. I upgraded from a stock Melzi on a Monoprice Maker Select v2.1 (a rebranded Wanhao i3, Cocoon Create). I had no real reason to other than I wanted something to do and I figured this would be a good project, and as always I’m looking for better prints. So why not? I got a BIGTREETECH SKR 1.3 and five (5) TMC2208 v3.0 UART ready steppers. I pulled the trigger and went all in head first after a single night of research. To be honest though when I started this journey there was not a lot of info for doing this just yet, the SKR was still pretty new. What info I have found came mostly from some facebook groups (BIGTREETECH) I am in and a few YouTube videos. But as I type this there is now tons of info available, just most of seems to be directed towards the Ender printers, yay.

 

Things to note up front:

This guide is a long one, I would read this all the way through first it’ll save you a headache. From what I read the TMC2208s don’t support Linear Advance while in stealthchop. It must be disabled and used as spreadcycle over UART instead if you want Linear Advance. The other option is to use a different driver than a 2208 for the extruder. This would get around the Linear Advance issue. It may also be fixed in Marlin further down the line, who knows.

Getting everything setup including the new programming environment was a pain in the ass, hopefully this “guide” will alleviate some of the pain.

I recommend that you DO NOT buy the TFT35 or any TFT (except maybe the new dual mode TFTs). The dual screens can switch between TFT mode and 12864 LCD mode. The TFTs do not have all the functionality of a regular LCD screen. I ordered the TFT35 at first and after two days I sent it back and got a LCD12864 Graphical display instead. Thats the route I am gonna go. The stock screen on a Wanhao i3 is not compatible with the SKR as far as I have been able to find, unless you rewire the plug. The TFT35 was $32 and the LCD12864 was only $12. Heres a good video showing the TFT35.

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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.