BIGTREETECH SKR 3 EZ V1.0 motherboard is a 32-bit 3D printer motherboard updated by the team of Shenzhen Biqu Technology Co., Ltd. for our EZ series drivers on the basis of SKR 3. It is compatible with boththe EZ series driver and the series of TMC drivers.

Download firmware URL：https://biqu3d.com/pages/download

Features

1. Using 32-bit ARM Cortex-M7 series STM32H743VIT6/STM32H723VGT6 main control chip, the performance has greatly improved.

2. The power chip adopts TPS5450-5A, which supports DC12/24V power input. The output current of the chip is up to 5A, and the peak value can reach 6A, which perfectly supports the power supply of Raspberry Pi.

3. The motherboard reserves the BOOT button, users can update the motherboard boot program through DFU.

4. Increase the protection circuit of the thermistor part to avoid the burning of the main control chip due to leakage of the heated bed or heating rod.

5. The numerical control fan realizes 24V, 12V, 5V voltage selection through the external power supply module, eliminating the need for the operation of the customer's external transformer module, thereby reducing the probability of damage to the motherboard.

6. The thermistor can select the pull-up resistance value through the jumper, and support PT1000 in this way without the need for external modules, which is convenient for customers to use DIY.

7. Support all versions of our company's serial screen, SPI screen and LCD screen.

8. Upgrade the configuration firmware through an SD card, the operation is simple, convenient and efficient.

9. On-board DIAG function pins can be used by simply plugging and unplugging the jumper cap.

10. Supports functions such as resume printing, Filament Runout Detection, Completed Shutdown, BLTouch, RGB Lights, etc.

11. High-performance MOSFETs are used to reduce heat generation.

12. Adopt a replaceable fuse for easy replacement.

13. WIFI module (ESP-12S, ESP-07, ESP32) general interface.

14. The on-board non-self-elastic MicroSD card slot, and is SDIO working mode, which greatly speeds up the transfer rate.

15. Onboard EEPROM, which is convenient for users to save parameter information.

16. Two types of CAN interfaces are reserved, USB port and XH2.54 6Pin terminal interface. The USB port is used to select CAN and USB through the double-pole double-throw switch, which is convenient for customers to use other accessories of the CAN interface.

17. The temperature sensor interface adopts a high-precision pull-up resistor.

18. Two types of drive sockets are used, which are compatible with our EZ series drive modules and TMC series drive modules.

19. Each motor drive module can select the corresponding motor voltage through the jumper cap.

20. The motor power supply supports up to 48V, and for the larger voltage when using TMC5160 and EZ5160, an isolation chip is used to protect the mainboard from burning IO.

The Common Characteristics in SKR 3 Motherboard and SKR 3 EZ Motherboard

• Multiple Cooling Fans. Three CNC fans could ensure the normal operation of your printer and advance the printing quality. They expel hot air, push cold air into the enclosed space, and are generally utilized in 3 parts, that is model cooling (part cooling), pipes heat dissipation, and chassis cooling (including the mainboard and the driver and so on).
  

• Five-way motor driver interfaces, respectively are X, Y Z(double), E0, and E1, which make the working more stable. The lateral movement of the 3D printer is usually assigned to the X- and Y-axis, while the Z-axis corresponds to vertical motion. Double extruders could make you realize printing two objects at the same time, improving your work efficiency.
  

• Designed with flexible connectivity, which means you can switch USB and CAN freely to connect more devices. Besides, SKR 3 and SKR 3 EZ mainboard added a protective circuit for thermistors to enhance your operational safety.
  

• DIY-friendly. We reserve the BOOT0 button, for the considering to easily enter the DFU mode to flash the firmware. Plus, the upgraded thermistor supports PT1000, no need for an external module. The Universal WIFI modular port (ESP12S, ESP-07, ESP32) allows using RRF firmware when you are doing DIY printing.
  

• Same Microprocessors and firmware, Both SKR 3 and SKR 3 EZ's Microprocessor is ARM Cortex-M7 CPU STM32H743VIT6. And they are compatible with three firmware, Marlin and Klipper, and RepRap, which are widely used in the 3D printing world.
  

• Marlin, which owns over 150 commands full-featured G-code, supports the installation of 1 heat bed and 5 extruders. Plus, 30 languages could be translated. Marlin Firmware runs on the 3D printer’s mainboard, controlling all the real-time activities of the machine. It manages the steppers, heaters, LCD display, lights, sensors, buttons, and other parts involved in the 3D printing process.
  

• Klipper has several attractive functions. First, it can achieve over 175K or even several million step rates per second. And it supports multiple micro-controllers printers. You could directly config your file, no need to reflash the micro-controller to change a setting. Plus, it supports automatic bed leveling and common temperature sensors.
  

• RepRap is a comprehensive motion control firmware, not only controlling 3D printers but also applicate in laser engraving or laser cutting and CNC. It supports mixing extruders and SPI-controlled stepper drivers. And it has a simulation mode, which can predict the accurate printing times.

The Differences between SKR 3 Motherboard and SKR 3 EZ Motherboard

• Different product sizes. SKR 3's product size is 110*85mm, and its installation size is 102*76mm. And SKR 3 EZ's product size is 109.7*98mm, installation size is 102*76mm.
  

• Distinct High motor voltage. SKR 3 motor voltage is from DC 12V to 24V, while SKR 3 EZ motor voltage is from 12V to 48V. You could adjust it with a jumper cap. The high voltage can extremely improve your printing speed. What's more, SKR 3 owns 2 normal fans, and the EZ version owns 3 normal fans, which can ensure the smooth operation of your printer and advance your printing quality.
  

• Different connection means. In SKR 3, you could use the driver connector to use our newly designed EZ driver. However, SKR 3 EZ can directly be inserted with the EZ driver, with no need for a converter. The EZ driver design could nicely protect your fingers from sharp pin headers. What's more, this fantastic protecting anti-plug linker design could help you safeguard your mainboard. For we have received the feedback that some customers burned the driver, mainboard and even burst into fire in some serious conditions due to the wrong inserting. So we create this upgraded driver technology, giving you a safe and pleasant user experience.
  

EZ2209 V1.0 and EZ2209 V1.1 will be shipped randomly, with no functional difference. If you want to specify the version, please contact us