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  1. #1

    Ender 3 Mobo repacement....

    Si I broke the USB connector on my Ender 3 and it was intermittently not running the extruder motor during prints so I decided to buy a cheap mobo to replace the factory one. I will detail what I have done in this thread.

    Here is the mobo I bought:

    I have already installed the mobo and I am getting ready to modify the firmware for my bltouch. Here are some pics while you wait for more:

    Yes they included the rubber ducky:

    Next to the factory mobo:


  2. #2
    Firmware has been a pain in the butt to get working but WOW is it super quiet now. You can barely hear the motors. I am going to bed. I will report back more later.

  3. #3
    I had some issues getting my bltouch to work while compiling the new firmware. It is working now. I am currently working on getting it calibrated with simplify3d and printing a good first layer. It is nearly silent while printing. I am really impressed with how quiet it is.

  4. #4
    OH and that installed pic is incorrect. There is an actual plug on the board for the bltouch so I didn't need that adapter and I had to switch the grd and 5v wires on the bltouch lead.

  5. #5
    More info. If you switch to this mobo when you compile the firmware the instructions have you bring of the configuration.h and configuration_adv.h from the Marlin-2.0.x\config\examples\BigTreeTech\SKR Mini E3 1.2 folder and put them in the Marlin-2.0.x\Marlin folder and then edit them in the Visual Studio Code editor.

    Well if you are using a bltouch you need to uncomment #define Z_SAFE_HOMING. You also need to comment out #define MESH_BED_LEVELING and uncomment #define AUTO_BED_LEVELING_BILINEAR. That will get the bed leveling working. #define GRID_MAX_POINTS_X and #define GRID_MAX_POINTS_Y are set to 5 which makes it probe 25 times which may be excessive and more time consuming but I am going to leave it at that for now. With my old motherboard it was set to 3x3. I may go to 4x4 if the extra time annoys me.

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