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Mainboard FAQ

Host Computer Connection Instructions​

Core Connection Restriction

The Fly-DP5 mainboard must and can only establish Klipper communication with the host computer via its onboard Type-C USB interface.

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Connection Requirements:

  • Use a high-quality Type-C data cable to ensure stable data transmission.
  • It is recommended that the cable length does not exceed 1.5 meters to avoid signal attenuation due to excessive cable length.
  • Please connect the other end of the data cable to a standard USB-A port on the host computer.

Common Issues and Troubleshooting​

Issue 1: Host Computer Cannot Recognize the DP5 Mainboard​

Troubleshooting Steps:

  1. Check Physical Connection: Confirm that you are using the mainboard's Type-C interface for connection.
  2. Confirm Firmware Status: Check if the mainboard has been correctly flashed with the Klipper firmware.

Issue 2: Host Computer Experiences Intermittent Reboots or Communication Abnormalities​

Problem Phenomenon If the Fly-DP5 mainboard is used as the power source for the host computer (e.g., Raspberry Pi), it may cause the host computer to experience:

  • Intermittent, unexplained reboots
  • Unexpected communication interruptions with the mainboard
  • Abnormal USB device recognition
  • Unexpected Klipper service stoppage

Root Cause and Solution The root cause of this issue is an incorrect power supply method. The host computer must be powered by its independent power adapter to obtain stable and sufficient current.

You Must Ensure:

  1. Host Computer Independent Power: The Raspberry Pi or other host computer must be connected to its original or dedicated power adapter.
  2. Prohibit Powering via Mainboard: Strictly prohibit powering the host computer by connecting the mainboard's 5V pin to the host's 5V power pin.

Please Check your wiring to ensure that only the USB data cable connects the host computer and the mainboard, and that no additional power supply wires exist.

Endstop Wiring Instructions​

Wiring Precautions
  • Three-wire endstops are extremely easy to wire incorrectly. Please double-check that the wire sequence is correct.
  • If you are unsure about the wiring method, do not connect the mainboard's 5V pin to avoid short circuits or device damage.

Standard Three-Wire Endstop Interface Definition:

  1. Signal (Signal)
  2. GND (Ground)
  3. 5V (Power)

For more detailed wiring methods and configuration, please refer to: Various Endstop Wiring Instructions

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