Huvud 3D Printer Toolhead Board (V0.61)

Huvud 3D Printer Toolhead Board (V0.61)

The Huvud 3D Printer Toolhead Board is a very small 3D printer board for use on a direct drive toolhead. It is designed to be used with Klipper firmware. Klipper has the awesome feature to be able to use multiple MCUs connected to the host over a (relatively) high latency connection. Using CAN bus it is possible to chain many boards using just a pair of twisted wires and power. A good solution for multiple head 3D printers.

The product picture is a symbolic picture. The final PCB will be black and version 0.61 of the Huvud board

Main power is 12-24V. 24V is preferred to keep the currents low.

Controller Board designed for use with Klipper firmware, especially for extruders to simplify wiring without losing features (USB bootloader pre-installed)

The HUVUD toolboard is designed to simplify wiring and configuration for extruders on klipper-based machines, which is particularily useful for toolchangers or extra large machines, but provides advantages for even the smallest of machines.

Key Features (V.61):

• Simplifies Wiring for any extruder head down to 4 wires – you just need 24V supply (V+, V-) and CAN bus (Can_H, Can_L)
• One TMC2209 stepper driver for the extruder
• Two MOSFETs for fans
• One big MOSFET for the hotend heater
• Thermistor input
• Support for an endstop (or filament runout sensor)
• STM32F103 72Mhz 32bit ARM MCU
• USB, for flashing firmware
• Comes with 4pin Molex cable connector and crimps
• Designed for serial tunneling through CAN
• Now comes with modifiable traces to enable direct serial thru the 4pin header

I/O included:

• 3x Endstop Pins (5v)
• 2x Thermistor (compatible with thermistors and PT1000), now using a 0.1% pullup resistor for supreme high-temperature accuracy!
• 2 PWM fan outputs
• Heater Output – 6A MAX (~140W @ 24V)
• 4 wire Stepper Motor
• Single-connector CAN+Power
• USB connector for Flashing Firmware and can double as backup signaling
• TMC 2209 stepper driver with digital current control
• Indicator LED’s for quick status updates
• ADXL345 onboard for easy input shaping and future features

Documentation:
Pinout and hook up
Klipper configuration
CAN bus

More on Github