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Mainboard FAQ

Host Connection Instructions​

Core Connection Restriction

The Fly-DP5 mainboard must establish Klipper communication with the host via its Type-C USB port.

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Connection Requirements:

  • Use a high-quality Type-C data cable to ensure data transmission stability.
  • It is recommended that the 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.

Common Issues and Troubleshooting​

Issue 1: Host Cannot Recognize the DP5 Mainboard​

Troubleshooting Steps:

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

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

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

Important Warning

  • Such connections are strictly forbidden, as they may damage the USB port or power circuitry of either the mainboard or the host.
  • Communication between the mainboard and the host should only be via the USB data cable; no other electrical connections should be established.

Correct Handling Method

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