BIGTREETECH SKR 3

Powerful mainboard with many interfaces

1 Customer Rating

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Product information & technical details

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

An image with the connections and the dimensions of the mainboard can be found in the pictures.

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Customer Reviews

English reviews written for BIGTREETECH SKR 3

1 customer review in all languages

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1 review

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