Nitehawk-SB by LDO is a toolboard specifically designed for the Voron Stealthburner toolhead. It is a toolhead PCB featuring RP2040 MCU, TMC2209 stepper drive, ADXL345 accelerometer all integrated into one board. The form factor of Nitehawk is based on HartK’s two piece stealthburner toolhead PCB but with some minor changes.
Nitehawk uses USB communication with the RPI rather than CAN. So the software and hardware setup is far simpler and familiar to most people who have setup Klipper printers before
The Nitehawk system consists of three PCBs and the Umbilical Cable. A simplified wiring diagram is shown below:
Nitehawk-SB works with the a standard Stealthburner toolhead, and is compatible with both Clockwork 2 and Galileo 2. However a few additional custom printed parts. The printed parts are available in the Nitehawk github repo https://github.com/MotorDynamicsLab/Nitehawk-SB
cd ~/klipper make menuconfig
In the configurator, Enable extra low-level configuration options, choose Raspberry Pi RP2040 and USB Communication interface, leave everything else as default:
make clean make
A firmware file called
klipper.uf2 will now be generated and can be located in the directory
cp out/klipper.uf2 ../klipper_config/klipper.uf2
cp out/klipper.uf2 ../printer_data/config/klipper.uf2
You can now download the file from the same interface used to access the config files:
When you update Klipper on your Raspberry Pi, you may be required to also update the firmware on your controllers from time to time. This method is therefore more convenient if your frame PCB already has Klipper firmware installed and is already wired to the rest of the printer.
ls /dev/serial/by-idto find the USB ID of your frame PCB. The USB ID should have a format similar to this:
cd ~/klipper make clean sudo service klipper stop make flash FLASH_DEVICE=/dev/serial/by-id/<your USB ID> sudo service klipper start
If you encounter any connection issues after flashing the new firmware, reboot your printer. Your frame PCB should now have the newest firmware.
This method is only recommended if your Nitehawk toolboard does not contain a Klipper firmware already flashed. It requires you to access the boot0 button on the PCB.
/dev/sda1when executing the command
ls /dev/sda. If not, try repeating the previous step.
sudo mkdir -p /mnt/pico sudo mount /dev/sda1 /mnt/pico sudo cp ~/katapult/out/katapult.uf2 /mnt/pico sudo sync sudo umount /mnt/pico
A Klipper Configuation can be found in the Nitehawk-SB github repo here. Remember to comment out
tachometer_ppr configurations if you do not plan to use a tachometer enabled fan.
Provided in the github repo is an optional
tacho_macros.cfg file which contains the macro
PREFLIGHT_CHECK. This macro very briefly turns on the part fan and checks the tachometer signal to see if the fan is spinning properly. To use the macro,
[include tacho_macros.cfg] in
printer.cfg and call
PREFLIGHT_CHECK at the beginning of the
|Device/Port||PCB Label||Connector Type||RP2040 Pin||Description|
|X/Y Endstop||Endstop||JST-XH 4P||gpio13/12 (X/Y)||Connects to the X and Y dndstop. X endstop is gpio13 and Y endstop is gpio12.|
|Hotend Heater||HE0||Screw Terminal / E0506||gpio9||Connects to the hotend heater.|
|Hotend Thermistor||TH0||JST-XH 2P||gpio29||Connects to the hotend thermistor. Uses a 2.2kΩ pull up resistor.|
|Part Cooling Fan||PCF (Fan adapter PCB)||JST-PH 3P||gpio6/17 (fan/tacho)||Connects to part cooling fan (via the fan adapter PCB). The fan control pin is gpio6 and the tachometer sensor pin is gpio17.|
|Hotend Fan||HEF (Fan adapter PCB)||JST-PH 3P||gpio5/16 (fan/tacho)||Connects to hotend fan (via the fan adapter PCB). The fan control pin is gpio5 and the tachometer sensor pin is gpio16.|
|Chamber Thermistor||CT||JST-PH 2P||gpio28||Chamber Thermistor port. Connects to an external thermistor. Uses a 4.7kΩ pull up resistor.|
|Probe||PROBE||JST-XH 3P||gpio10||Probe for bed leveling and/or Z sensing. 24V power only.|
|Motor||MOTOR||JST-XH 4P||gpio23/24/25/0/1 (step/dir/ena/uart/tx)||A stepper motor port for the extruder. Driven by a TMC2209 chip. The current sense resistor is 100 mΩ. Enable is active low|
|Neopixel||LED (Fan adapter PCB)||JST-PH 3P||gpio7||Connects to neopixel LEDs (via the fan adapter PCB).|
|Activity LED||ACT||N/A||gpio8||A small software controlled onboard LED. Active low.|
|Accelerometer||N/A||N/A||gpio21/18/20/19 (cs/clk/mosi/miso)||ADXL345 accelerometer for input shaping. Controlled via software SPI.|
|Power Supply Input||Vin||20||24||28||V||power input for the entire frame PCB|
|5V Current||Irpi||5||A||current output for the 5V buck converter|
|Fan Current(HEF, PCF)||Ifan||TBD||A||current rating for each fan port (HEF and PCF).|
|Hotend Current||Ihe||TBD||A||limited by max. continuous current of mosfet|
Q. I have an LDO V2.4/Trident Kit, the fan adapter PCB provided looks identical to the one in the kit are they interchangeable?
A. Yes! The fan adapter PCB is 100% the same as the one in the current LDO kits.
Q. Can I use the provided cable in a drag chain or umbilical setup?
A. Yes! The included toolhead cable is drag chain rated but also easily set up for umbilical use.
Q. I see that there is a 4pin XY endstop connector, what is that for?
A. Since there is no longer any breakout PCB, the XY endstop can instead be routed a short distance through the X drag chain and into the toolboard. Of course, you can also opt to route directly back to the mainboard or just use sensorless homing.
Q. What is the ACT LED for?
A. That’s just a controllable LED, you can find it in the klipper config we provide. It doesn’t do anything else otherwise.