Link Search Menu Expand Document

Voron V0.1 - SKR Pico Wiring

Initial Removal of Jumpers

  • The BTT SKR Pico will arrive without any jumpers being set.

Initial Preparation - Set Jumpers

  • All Jumpers should be removed from the SKR Pico board.
  • If you want to open the above picture, in a new tab of your web browser, then click here

Voltage Selection Header and Other Headers

  • Ensure the removal of the SW_USB 5V power supply jumper (“SW_USB header, shown in the PURPLE box”) which avoids the interaction between the USB 5V of Raspberry Pi and the DC-DC 5V of the motherboard.

  • In the diagram below, ensure all of “DIAG Jumpers” (shown in the ORANGE boxes) are removed to avoid the influence of TMC2209 DIAG on the endstops.

  • Ensure the removal of the SELECT-PROXIMITY-I/O-PIN jumper (shown in the YELLOW box). This SELECT-PROXIMITY-I/O-PIN jumper selects which connector uses IO22 pin (either connector PS or PROBE). Since the Voron printer does not use a proximity sensor (inductive probe), remove the jumper.

  • Ensure the removal of the SELECT-PROXIMITY-STYLE jumper (shown in the RED box). Since the Voron printer does not use a probe device, ensure this header is empty.

IMPORTANT: Double check all the GREEN jumpers are removed, especially the headers called out by the COLORED BOXES, BEFORE the power supply is connected.

  • If you want to open the above picture, in a new tab of your web browser, then click here

MCU

    • Plug in stepper motors for X positions X (motor connector)
    • Plug in stepper motors for Y in positions Y (motor connector)
    • Plug in stepper motors for Z in positions Z1 (motor connector)
    • Plug in stepper motors for E in positions E (motor connector)
    • Plug Hot End thermistor to thermistor TH0 (IO27)
    • Plug Hot End heater in to HE (IO23)
    • Plug Hot End Fan Signal in to FAN2 (IO18)
    • Plug Hot End Fan V+ (+5VDC) in to LASER connector’s 5V PIN
    • Plug Part Cooling Fan in to FAN1 (IO17)
    • Plug Bed Thermistor in to THB (IO26)
    • Connect The DC bed to HB (IO21)
    • Connect X end stop to X-STOP connector (IO4)
    • Connect Y end stop to Y-STOP connector (IO3)
    • Connect Z end stop to Z-STOP connector (IO25)
    • Wire 24V and -V from DC power supply to Power_In
  • if using USB to communicate with Pi:
      • Connect USB Cable to the SKR Pico board, but do not connect it yet to your Raspberry Pi
  • if using UART (3-wire serial communication) with Pi:
      • Move Hot End Fan V+ (+5VDC) in to SERVOS connector’s 5V PIN
      • Connect UART serial cable (3-wire communication) to the SKR Pico board’s “Raspberry Pi” connector, but do not connect it yet to your Raspberry Pi

MCU Diagram

  • If you want to open the above diagram, in a new tab of your web browser, and have the ability to zoom and download the diagram in JPG format then click here

Powering the Raspberry Pi & Setting up UART Serial Communications with the Raspberry Pi

The Klipper Configuration file for SKR Pico board


The Klipper Configuration file from VoronDesign/Voron-0 GitHub Repo, Voron0.1 branch for SKR Pico board is located here

After I have Wired up the MCU Board, What Comes Next?

  1. Once the MCU board is wired up and wire management has been performed, the next step is to install Mainsail/Fluidd or Octoprint, please see The Build ═► Software Installation

  2. Once Mainsail/Fluidd or Octoprint has been installed, the next step is to compile and install the Klipper Firmware, please use the Color Pin Diagram, look for “Klipper Building Options”; an alternative source of information on how to build and install the Klipper firmware for the SKR Pico is located here or the picture of the menu config screen for Klipper

  3. Once the MCU board has the Klipper Firmware Installed, the next step is to create/edit the Klipper Config file (skr-pico-v1.0.cfg rename it to printer.cfg) to ensure your Voron build matches your Klipper Config file, please see the file located here;

  4. After creating/editing the Klipper Config file (skr-pico-v1.0.cfg renamed to printer.cfg), the next step is to check all the motors and the mechanics of the Voron printer, please see The Build ═► Initial Startup Checks