BIGTREETECH SKR 3

Powerful mainboard with many interfaces

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Product information & technical details

Manufacturers: BIGTREETECH
Product types: Mainboards

Description

BIGTREETECH SKR 3 is a successor to the SKR 2 and has many new functions. This versatile 32-bit motherboard with powerful 480 Mhz ARM Cortex-M7 is suitable for most 3D printers and offers many interfaces and upgrade options compared to most built-in motherboards.

The motherboard is compatible with Klipper and Marlin open-source firmware.

480Mhz ARM Cortex-M7

BIGTREETECH SKR 3 uses a 32-bit ARM Cortex-M7 series STM32H743VIT6 chip with a core frequency of 480MHz, providing enough performance to handle even the most demanding user interfaces while enabling stutter-free printing.

DIY friendly

BOOT0 facilitates DFU mode to flash firmware
The upgraded thermistor input now requires no external module for P1000
A universal WiFi modular port allows the use of RRF firmware

SKR 3 compared to SKR 2 and SKR 1.4

Mainboard	SKR 3	SKR 2	SKR 1.4
Main chip	STM32H743VIT6	STM32F407VGT6	LPC1768
Core frequency	480MHz	168MHz	100MHz
Output current	5A	4A	3A
CNC fan	3 (24V, 12V, 5V optional)	3	1
PC interface	USB	USB	USB
Firmware support	Marlin, Klipper	Marlin, RepRap	Marlin
Temperature sensor interface	1-way 100K NTC, 2-way 100K NTC, PT1000 optional	TH0, TH1, TB, 3-Way 100K NTC (Thermistor)	TH0, TH1, TB, 3-way 100K NTC (Thermistor)
WiFi interface	ESP-12S, ESP-07S, ESP32	ESP-12S, ESP-07S	ESP-01S
Reserved BOOT0	Yes	no	no
Onboard EEPROM	Yes	no	no

Product Specifications

Product size	110x85mm
Installation size	102x76mm
Processor	ARM Cortex-M7 CPU STM32H743VIT6
EEPROM	24C32 32-Kbit
Input voltage	DC12V-DC24V
Logic voltage	DC 3.3V
Firmware	Marlin, Klipper
WiFi interfaces	ESP-12S, ESP-07S, ESP32
Fan interfaces	3 CNC fans, 2 normal fans, Optional CNC fan voltage
Extension interfaces	Servos, Probe, PS-ON, PWR-DET, Fil-DET, CAN FD
Motor drivers	TMC5160, TMC2209, TMC2225, TMC2226, TMC2208, TMC2130, ST820, LV8729, DRV8825, A4988, etc.
Driver working modes	SPI, UART, STEP/DIR
Motor driver outputs	X, Y, Z (Dual Z-axis), E0, E1, five-way
Heating interface	Heated bed (HB), heating cable (E0, E1)
Temperature sensor interface	1-way 100K NTC, 2-way 100K NTC, PT1000 optional
PC interface	USB
File format	Gcode
3D printer setup	XYZ, Delta, Kossel, Ultimaker, Corexy
Recommended software	Cura, Simplify3D, Pronterface, Repetier-host, Makerware
Screen	Serial touch screen, SPI touch screen, LCD display