Ordinarily the installation of Neopixels on the SKR MINI E3 V3 should be simple enough. But requires a little bit more information and is normally covered in a separate post. However there are issues with Marlin not supporting Neopixels on the SKR MINI E3 V2. Nonetheless if a safe solution arrises then a post will be created to guide you through adding Neopixel lighting to the SKR MINI E3 V2. NEOPIXEL_LED (Adafruit NeoPixel) is not supported for HAL/STM32F1. Comment out this line to proceed at your own risk! Firmware Installation The first thing we are going to do is activate the main function of filament detection. We will edit the Configuration.h file and look for the FILAMENT_RUNOUT_SENSOR function. Update: From version 2.0.9 of Marlin firmware, when using a BLTouch, the Z_MIN_PROBE_ENDSTOP_INVERTING option needs to defining as false. Importantly a genuine Antclabs BLTouch works without any issues with the new method. #define Z_MIN_PROBE_ENDSTOP_INVERTING false STEPPER DRIVERS Default stepper driver settings within Marlin firmware. If later you enable the linear advance option, leave the S_CURVE_ACCELERATION option disabled, as they do not play nicely together. However, there is an EXPERIMENTAL_SCURVE option for use with Linear Advance within the Configuration_Adv.h file. @section probes Default probe Z connection settings within Marlin. Furthermore, some filament sensors use an internal pull-up resistor and require the FIL_RUNOUT_PULLUP option to be enabled. #define FIL_RUNOUT_PULLUP

Without a doubt, having three PWM controllable fan outputs on the SKR Mini E3 V3 is perfect for using thermostatically controlled fans to save on both noise and power.The SKR Mini E3 V3.0 is almost a direct replacement of the Ender 3 mainboards. It has the same physical size & mounting holes. The only differences are:

Although having a probe is helpful, sometimes the probing of the bed can go wrong. Because of this, the G29_RETRY_AND_RECOVER option is handy as it will automatically try again to probe the bed, saving time and user interaction. #define G29_RETRY_AND_RECOVER ARC_SUPPORT The TMC driver interpolatesetting may reduce the audible noise of printer movement at the cost of introducing a small systemic positional error. While on some of BIGTREE-TECH’s 3D printer mainboards such as the SKR V1.4 or Pro, you need to reposition the power jumper. However on the SKR MINI E3 V2 there is no power jumper to worry about. define FIL_RUNOUT_ENABLED_DEFAULT true // Enable the sensor on startup. Override with M412 followed by M500.Furthermore, I have listed both the original and alternative wiring colour codings from top to bottom. Importantly the bottom wire is GND (Brown or Blue) and is closest to the thermistor connections, and the White probe SIGNAL is nearest the USB port. BLTouch Alternative Wiring But sadly, those using the DWIN graphical displays found on the Creality Ender 3 V2 3D printer have many options limited within Marlin. Because of this, the SCROLL_LONG_FILENAMES option needs to remain disabled. #define LONG_FILENAME_HOST_SUPPORT

Next, we need to update a section in the configuration.h, configuration_adv.h, and platform.ini files. Configuration.h Changes While you will be pleased to hear all the hard work has come to an end, all that remains is to compile the firmware. However, if this is your first time compiling Marlin firmware, or you need a refresher. Then have a read of our Marlin firmware from computer to printer guide. Once again, thanks for reading and keep well. A worthwhile read If one configures a hold_currentthen the TMC driver can reduce current to the stepper motor when it detects that the stepper is not moving. However, changing motor current may itself introduce motor movement. TMC interpolate setting introduces small position deviation ¶ To get the fans working properly in Klipper, connect the fans as per the pinout section above and update printer.cfg as shown below: It goes without saying that if you wish, you can change the assignment pins and use another free connector for this function. This way if you have a damaged entry you can move to another with great ease, since Marlin is quite “friendly” in this regard.Additionally, a genuine BLTouch probe version 3 or higher performs better with a 5V power source, which the BTT E3 RRF supplies via the Z-PROBE connection. Thus the BLTOUCH_SET_5V_MODE in the Marlin firmware needs enabling. #define BLTOUCH_SET_5V_MODE

Many people still have the original 8-bit board, so if that’s the case this upgrade would be a pretty significant change for your 3D printer. You’re getting plenty of new features while also preparing your 3D printer for the future and what ever changes may come about. When connecting all the wires of a probe to the Z-Probe interface, the Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN needs disabling and the USE_PROBE_FOR_Z_HOMING option enabled. //#define Z_MIN_PROBE_USES_Z_MIN_ENDSTOP_PIN And finally, in the Configuration.h file, we will activate the NOZZLE_PARK_FEATURE option. We proceed to uncomment the constant so that it looks like this:We can follow the official Klipper documentation to install it we also recommend using Kiauh, Fluidd Pi or MainsaiOS have images that greatly facilitate the installation process of all the necessary components. You can review our Klipper Guide. In any case, the Runout Sensor functionality (filament detection) is common to Marlin, so regardless of the electronics or display you use, the changes to be made here, except the pins where we will connect the limit switch, are common. Secondly, being able to adjust the BABYSTEPPING option without having to home beforehand comes in handy. Furthermore, it doesn’t have any side effects of remaining enabled. Because of this, it makes sense to have BABYSTEP_WITHOUT_HOMING enabled. #define BABYSTEP_WITHOUT_HOMING BABYSTEP_ALWAYS_AVAILABLE Congratulations on completing the Marlin firmware PlatformIO and the Configuration.h file setup for the BTT E3 RRF 3D printer mainboard. Take a much-deserved break and make yourself a drink.