Ender 2 Pro Conversion to BTT-SKR-Mini-E3 + TFT35 Touch Screen
Description
The manufacturer had told me via email that the Ender 2 Pro could not be upgraded to either a 4.2.7 main board, or any BTT main boards. So I created this project because I was unhappy with the options, or lack there of, with the Ender 2 Pro firmware and main board. I have included the following files: Configuration.h Configuration_adv.h Version.h Platformio.ini firmware.bin and there is a copy of the precompiled firmware should you choose to do this conversion There are .stl files for a case for the TFT35 Touch Screen, with reset button, and a screen cover. A working knowledge of how to make changes to configuration files and how to compile firmware is required. Use this conversion at your own risk. Any damage or problems you have are not my fault. It worked for me because I have the programming background, and the engineering background to do this. YOU HAVE BEEN FORMALLY WARNED. A link to my GitHub Page for anyone who wants to check out the Configuration files, and there is also a Pre-Compiled firmware.bin file for testing. There is also a folder with STL files and GCODE Files to print a case for the TFT35 Touch Screen. There is also a preconfigured version of Marlin-bugfix-2.1.x that is ready to be compiled for firmware on the Ender 2 Pro-BTT, add, subtract, make changes, compile. Knock yourself out. https://github.com/The-300lb-Gorilla/Ender-2-Pro-BTT You will need the following 3 items to do this conversion: Parts Links:(I DO NOT GET PAID FOR ANY LINKS I POST) BTT-SKR-Mini-E3-v2 Main Control Board and TFT35-E3-v3 Touch Screen Bundle https://www.amazon.com/gp/product/B089DBS62S Ender 3 Motor Cable Set https://www.amazon.com/gp/product/B07SX11SKB Longer 10 Pin LCD Cable https://www.amazon.com/dp/B07SR3S2W3 I was able to do this upgrade in two stages. Stage 1: Hardware and Cables Finding a suitable main control board to fit the Ender 2 Pro in it's original mounting position and original mounting holes in the main control board. After I discovered that the Creality 4.2.3 main control board had 6 pin to 5 pin motor cables, I ordered Ender 3 motor cables. The Ender 3 cables have a 6 pin to 4 pin setup and are almost the exact same length as the Ender 2 Pro cables. I then decided on the BTT-SKR-MINI-E3v2 main control board, and the TFT35-E3v3 touch screen interface. Stage 1 complete. Stage 2: Firmware Since replacing the motor cables to the more standard 6 pin to 4 pin layout, the options for upgrading were wide open. However, I wanted to keep the upgrade simple and within the means of your average Ender 2 Pro user. I went to the BTT GitHub page and went to the Creality configurations, and selected the Ender 3 configuration for the BTT-SKR-Mini-E3 main board. The reason for this was that the Ender 3 and the Ender 2 Pro were very similar. Also, I only needed to re-define a hand full of parameters to make the Ender 3 firmware configuration work for the Ender 2 Pro. There were about a dozen or so that I changed. I then compiled the firmware, and it compiled on the first try. (Lucky I guess) Installed the firmware on the BTT-SKR-Mini-E3 Main Control Board. Turned the Ender 2 Pro on, and waited for the firmware to load. SUCCESS! Ran my first mesh bed leveling, set the z height offset, and ran my first print. JUNK! Went back and looked at the Configuration.h, and found that I had not changed the skew compensation measurements from an Ender 3 to the Ender 2 Pro measurements. So, I changed the measurement based on the diagrams above this section. Reran the mesh bed leveling again, and reset the Z offset.The I ran another test print. Good, but not great, elephant footing. Adjusted the Z height offset again, and it worked. I had my first print, a 20x20x20mm test cube. No flaws, no layer shifting, no over or under extrusions. So I spent the next few days perfecting my slicer settings, and now I have an Ender 2 Pro, running a BTT-SKR-Mini-E3 + TFT35 E3 Touch Screen. I really enjoyed doing this project. My Ender 2 Pro-BTT is running very smoothly. The prints are great, and no more reliance on the OEM for firmware, or for replacement Main Control Board, since 2 died in this machine within 4 months. Warranty replaced, but took 8 weeks to get them. No more. I plan on doing the same upgrade to my second Ender 2 Pro over the next couple of months as time and money allows. I hope this is helpful to other Ender 2 Pro owners. Below are 2 videos I did of the Ender 2 Pro-BTT https://www.youtube.com/watch?v=N8az6_WKxE4 https://www.youtube.com/watch?v=yrhNuA37Tg0&t=5s
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