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BTT SKR Mini E3 v3.0 User Manual

The BTT SKR MINI E3 V3.0 is a motherboard designed to replace the original motherboard in the Ender 3 3D printer. It features an upgraded STM32 microcontroller, improved heat dissipation, additional fan outputs, and USB-C connectivity. The motherboard supports various 3D printing functions and interfaces such as sensorless homing, BLTouch, RGB lighting, and TFT displays. It can be updated via firmware downloaded from the BigTreeTech website and installed on an SD card.

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991 views9 pages

BTT SKR Mini E3 v3.0 User Manual

The BTT SKR MINI E3 V3.0 is a motherboard designed to replace the original motherboard in the Ender 3 3D printer. It features an upgraded STM32 microcontroller, improved heat dissipation, additional fan outputs, and USB-C connectivity. The motherboard supports various 3D printing functions and interfaces such as sensorless homing, BLTouch, RGB lighting, and TFT displays. It can be updated via firmware downloaded from the BigTreeTech website and installed on an SD card.

Uploaded by

tarmizi
Copyright
© © All Rights Reserved
Available Formats
Download as PDF, TXT or read online on Scribd
Download as pdf or txt
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BIGTREETECH

SKR MINI E3 V3.0


User Manual
Instruction

BTT SKR MINI E3 V3.0 is a motherboard designed for Ender3,


which launched by the 3D printing team of Shenzhen Big Tree
Technology Co., Ltd. It is the perfect replacement of the original
motherboard of Ender3.

Features

Redesigned motherboard ID(Industrial Design) make it


good-looking

Adopts STMicroelectronics G0 series MCU STM32G0B1RET6

Upgraded heat sink improves heat dissipation

Thermistor inputs are protected from short circuit to Vin

Added a third PWM controlled cooling fan output

Adopt MicroUSB instead of MiniUSB interface

Added +3.3V power supply for SPI output header


Parameters

Product size: Mounting size:


103.75*70.25mm Please refer to BTT SKR MINI E3 V3.0-SIZE.pdf
for more

Board layer: MCU:


4 ARM Cortex-M0+ STM32G0B1RET6

Power input: Logic voltage:


DC 12/24V 3.3V

Motor driver: Interfaces of motor driver:


UART mode of on-board TMC2209 XM, YM, ZAM, ZBM, EM

Interface of temperature sensor: Display screen:


TH0, THB, 2-way 100K NTC (RTD) 2.4-inch TFT, 3.5-inch TFT, Ender3 original
LCD12864 screen, etc.

PC communication interface: File format:


USB Micro B type, easy to plug, G-code
communication baud rate 115200

Recommended software:
Cura, Simplify3D, Pronterface, Repetier-host, Makerware

Motherboard LED meanings


When the motherboard is powered on:

Power LED = Red. Solid on = Normal power supply

Status LED = Red. Blinking during a firmware update. Controlled by


firmware otherwise
D8 green light for the hot bed HB status indicator: always on when
heating, off when not heating;

D6
D6 green
greenlight forfor
light the heating
the rod rod
heating E0 status indicator:
E0 status always on when
indicator:
heating,
always onoff when
when not heating;
heating, off when not heating;

D10 green light


D6 green light for
forthe
theCNC fan FAN0
heating rodstatus indicator:
E0 status on when open,
indicator:
off whenon
always closed.
when heating, off when not heating;

D7 green light for the CNC fan FAN1 status indicator: on when open, off
when closed.

D3 green light for the CNC fan FAN2 status indicator: on when open, off
when closed.

D9 green light for the SD card status indicator: light up when inserted
into the SD, off when pulled out

Communication of Motherboard and PC


The motherboard can communicate with a PC using the USB interface.
The same USB interface can be used to communicate with a Raspberry
pi or any other host device.
Motherboard Interfaces
Size Diagram

Wiring Diagram
Sensorless homing function

As shown, connect the corresponding axes with the jump caps to choose
Sensorless homing function

NOTE: If you choose this function, you cannot use external ENDSTOP!

5V power supply for BLtouch, TFT, RGB interfaces

1、To use the onboard 5V PSU, short the pins shown in the above image using a jumper.

2、To use an external BIGTREETECH DCDC5V V1.0 module, short the pins shown in the above
image using a jumper.
Connection of cooling fan

Connect the fan by FAN2 to realize the whole machine cooling.


Pleast note that the operating voltage is the same with the input power supply voltage to avoid
damage.

Connection to BIGTREETECH Relay V1.2

Connection to BTT UPS 24V V1.0


Connection to Neopixel light

Connection to BL touch
Firmware of motherboard
The package contains the firmware for testing (Ender3), which can be
used directly or changed according to your needs.

How to get the firmware


Contact our customer service or technical support;
Login to our website to download: https://github.com/bigtreetech

Motherboard firmware update


Copy firmware.bin file to the root directory of SD card

NOTE: Do not change file name!


Insert the SD card into the slot, re-power on or reset, the update will complete after 10S，
And you should see the status LED blinking red during the update..

Please refer to the BTT SKR MINI E3 V3.0-PIN.pdf


for motherboard firmware DIY.

Caution
The text form and file name of firmware in the SD card cannot be
changed from“firmware.bin”.

The wiring must be done before powering on.

The LCD screen only supports the LCD12864 screen with


CR10_STOCKDISPLAY interface.

Should you have any issues, please don't hesitate to contact us. We
strive to provide you with the best quality products and services. If
you have any good comments or suggestions, please feel free to share
with us. Thank you for choosing BIGTREETECH products!

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