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Motherboard FAQ

Host Computer Connection Instructions​

Core Connection Restriction

The Fly-D5 motherboard must establish Klipper communication with the host computer via its Type-C USB interface.

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Connection Requirements:

  • Use a high-quality Type-C data cable to ensure data transmission stability.
  • It is recommended that the data cable length does not exceed 1.5 meters; avoid using excessively long cables.
  • 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 D5 motherboard​

Troubleshooting Steps:

  1. Check Physical Connection: Ensure you are using the Type-C interface on the motherboard for connection.
  2. Confirm Firmware: Check if the motherboard has been correctly flashed with the Klipper firmware.

Issue 2: Explanation of Motherboard Back-Powering the Host​

Cause of the Issue It is prohibited to connect the motherboard's 5V power pins (e.g., the 5V on the limit switch interface) to the 5V power pins of the host computer (such as a Raspberry Pi). This type of connection will cause a power conflict.

Important Warning

  • This type of connection is strictly forbidden, as it may damage the USB interface or power circuit of either the motherboard or the host computer.
  • Communication between the motherboard and the host computer should only be via the USB data cable; no other electrical connections should be established.

Correct Handling Method

  1. Check and remove any 5V connection lines between the motherboard and the host computer other than the USB data cable.
  2. Ensure the host computer (e.g., Raspberry Pi) is powered by its own independent power adapter.
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