The RKE family of toolhead boards are based off the roadkill board designed xbst_ but offers numerous improvements.

• Heater current capacity is greatly improved offering 5A of capacity on the RKE-Long board and 6A on RKE².
• Support for simultaneous use of neopixels, filament sensor, inductive probe and x endstop switch with dedicated ports for all features.
• All boards within the RKE family are pin compatible allowing for mix and matching of boards.

• Heater screw terminal is polarised, as the 24V supply is used as a common rail.
• Nylon or printed washers should be used to protect the mounting holes due to the proximity of the traces to the holes.
• LED port is designed for neopixels and uses a common 5V rail with the filament sensor port.
• Probe port has a 24V power rail derived from the heater.

⚠Do not connect a wire between the MCU and the Roadkill probe port for V, this will result in backfeeding 24V into the MCU. V is provided from the Heater

Per Board,

• 1 x 20 pin IDC header (2x10 2.54mm pitch)
• 5 x 2 pin JST-XH
• 3 x 3 pin JST-XH (2x for RKE Long)
• 1 x 4 pin JST-XH (2X for RKE Long)
• 1 x 5 mm pitch screw terminal (TB00250002BE)

Molex temp-flex ribbon is the preferred ribbon solution (Molex, 100057-0101).

For IDC connector/sockets 3M D89120-0131HK with D3448-89120 strain relief clip are the preferred solutions.

IDC numbering is ODD_EVEN with 1 denoted by an arrow on the PCB

Pin 1 of the JST-XH ports is the square pads on the PCB.

For RKE²

RKE Long utilises a combined Filament Sensor and X endstop port pinout is below.

It is critical to wire Z probe correctly to avoid damage to MCU. Follow the below wiring guides

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