The SKR V1.4, manufactured by BTT (BigTreeTech) with part ID 001, is a powerful 32-bit control board designed for 3D printers. It is based on the ARM Cortex-M3 processor, offering enhanced performance and flexibility compared to traditional 8-bit boards. The SKR V1.4 supports a wide range of stepper motor drivers, multiple connectivity options, and is compatible with popular open-source firmware like Marlin, making it a versatile choice for custom 3D printer builds and upgrades.
Explore Projects Built with SKR V1.4
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This circuit features an Arduino Uno R3 microcontroller connected to a Huskylens (an AI camera module), an IR LED Night Vision Ring, and a Tilt Pan module. The Huskylens is interfaced with the Arduino via I2C communication using the SDA and SCL lines, while the Tilt Pan module is controlled by the Arduino through digital pins 10 and 11 for signal and output control. The IR LED ring and Tilt Pan are powered directly from the Arduino's 5V output, and all components share a common ground.
This circuit features an Arduino UNO microcontroller interfaced with two Rhino motor drivers to control four DC motors, powered by a 12V battery. The Arduino is also connected to a FLYSKY FS-IA6 receiver to receive remote control signals, which likely dictate the motor operation. The code provided for the Arduino is a template with empty setup and loop functions, indicating that the specific control logic for the motors and interaction with the receiver is yet to be implemented.
This circuit is a remote-controlled system using an Arduino Nano to manage a brushless motor via an Electronic Speed Controller (ESC) and four Tower Pro SG90 servos. It also includes an NRF24L01 wireless module for communication, powered by a 10000mAh Lithium-ion battery.
This is a mobile robot platform controlled by an Arduino UNO with a sensor shield. It uses an HC-SR04 ultrasonic sensor for obstacle detection and a servo motor for directional control. The robot's movement is powered by gearmotors controlled by an L298N motor driver, and it is designed to navigate by avoiding obstacles detected by the ultrasonic sensor.
Upgrading existing 3D printers for better performance
CNC machines and laser engravers
Robotics projects requiring precise motor control
Technical Specifications
Key Technical Details
Processor: ARM Cortex-M3 (LPC1768, 32-bit)
Input Voltage: 12V–24V DC
Stepper Driver Support: Supports TMC, A4988, DRV8825, and other stepper drivers
Connectivity:
USB Type-B for firmware upload and communication
SD card slot for offline printing
UART, SPI, and I2C interfaces
Firmware Compatibility: Marlin, Smoothieware
Number of Stepper Motor Ports: 5 (X, Y, Z, E0, E1)
Heated Bed Output: 1 channel
Fan Outputs: 3 controllable fan ports
Thermistor Inputs: 3 (for hotend, heated bed, and additional sensors)
Expansion Ports: BLTouch, filament runout sensor, RGB LED, and more
Pin Configuration and Descriptions
Main Connectors
Pin Name
Description
X, Y, Z, E0, E1
Stepper motor driver sockets for axis and extruder control
HE0, HE1
Outputs for hotend heaters
BED
Output for heated bed
FAN0, FAN1, FAN2
Controllable fan outputs
TH0, TH1, THB
Thermistor inputs for temperature monitoring
EXP1, EXP2
Connectors for LCD or touchscreen displays
BLTouch
Dedicated port for auto bed leveling sensor
USB
USB Type-B port for firmware upload and PC communication
SD
SD card slot for offline printing
Power Inputs
Pin Name
Description
VIN
Main power input (12V–24V DC)
5V
5V power supply for logic circuits
Communication Interfaces
Pin Name
Description
UART
Serial communication interface
SPI
Serial Peripheral Interface
I2C
Inter-Integrated Circuit interface
Usage Instructions
How to Use the SKR V1.4 in a Circuit
Power Supply: Connect a 12V–24V DC power supply to the VIN and GND terminals. Ensure the power supply can handle the current requirements of your 3D printer.
Stepper Drivers: Insert compatible stepper drivers (e.g., TMC2208, A4988) into the X, Y, Z, E0, and E1 sockets. Ensure the drivers are oriented correctly.
Motors and Sensors: Connect stepper motors, thermistors, and endstops to their respective ports.
Heaters and Fans: Attach the hotend heater, heated bed, and fans to the HE0, BED, and FAN ports.
Firmware: Flash the board with compatible firmware (e.g., Marlin) using the USB port or SD card. Configure the firmware to match your hardware setup.
LCD/Touchscreen: Connect an LCD or touchscreen display to the EXP1 and EXP2 ports if required.
Additional Features: Attach optional components like a BLTouch sensor or filament runout sensor to their dedicated ports.
Important Considerations and Best Practices
Stepper Driver Configuration: Set the correct microstepping and current limits on your stepper drivers before installation.
Cooling: Ensure adequate cooling for the stepper drivers and the board to prevent overheating.
Firmware Configuration: Customize the firmware (e.g., Marlin) to match your printer's hardware, including stepper motor steps/mm, thermistor types, and endstop logic.
Wiring: Double-check all connections to avoid short circuits or incorrect wiring.
Example Code for Marlin Firmware Configuration
Below is an example of configuring the SKR V1.4 for use with an Arduino IDE-compatible Marlin firmware:
// Example Marlin configuration for SKR V1.4
// Ensure you select the correct board in the Marlin configuration file
#define MOTHERBOARD BOARD_BTT_SKR_V1_4
#define SERIAL_PORT -1 // Use USB for communication
#define SERIAL_PORT_2 0 // Optional second serial port
// Define stepper motor settings
#define DEFAULT_AXIS_STEPS_PER_UNIT { 80, 80, 400, 500 } // X, Y, Z, E
#define DEFAULT_MAX_FEEDRATE { 300, 300, 5, 25 } // mm/s
#define DEFAULT_MAX_ACCELERATION { 3000, 3000, 100, 1000 }
// Define thermistor types
#define TEMP_SENSOR_0 1 // Hotend thermistor
#define TEMP_SENSOR_BED 1 // Heated bed thermistor
// Enable BLTouch for auto bed leveling
#define BLTOUCH
#define AUTO_BED_LEVELING_BILINEAR
#define Z_SAFE_HOMING
Troubleshooting and FAQs
Common Issues and Solutions
Board Not Powering On:
Ensure the power supply is connected correctly and providing the correct voltage (12V–24V).
Check for loose or damaged wires.
Stepper Motors Not Moving:
Verify the stepper drivers are installed correctly and configured for the correct current.
Check the firmware configuration for motor settings.
Temperature Readings Incorrect:
Ensure the thermistors are connected to the correct ports (TH0, TH1, THB).
Verify the thermistor type is correctly defined in the firmware.
USB Connection Not Recognized:
Install the correct USB drivers for the SKR V1.4.
Try a different USB cable or port.
Firmware Not Flashing:
Ensure the firmware file is named correctly (e.g., firmware.bin) and placed on the SD card.
Use a freshly formatted SD card (FAT32 format).
FAQs
Can I use the SKR V1.4 with TMC2209 drivers?
Yes, the SKR V1.4 supports TMC2209 drivers. Ensure you configure the firmware and jumper settings correctly.
What firmware is recommended for the SKR V1.4?
Marlin is the most commonly used firmware, but Smoothieware is also supported.
Does the SKR V1.4 support dual Z-axis motors?
Yes, you can connect dual Z-axis motors using the Z and E1 stepper driver ports.
How do I update the firmware?
Place the compiled firmware file (firmware.bin) on an SD card, insert it into the board, and power it on. The board will automatically flash the firmware.
Is the SKR V1.4 compatible with a Raspberry Pi for OctoPrint?
Yes, you can connect the SKR V1.4 to a Raspberry Pi via USB for use with OctoPrint.
Open Project in Cirkit Designer
