Weird USB jumper on a ZNP/MKS Robin Nano V1.2/3 Board

General Discussion
1

Basic Information:

Printer Model: Neptune 2/s
MCU / Printerboard: ZNP Robin Nano v1.2/3 (MKS Robin Nano v1.2)
Host / SBC: Marlin (going to Klipper)

I was wonder if anyone has ever switched this jumper? Can I switch this jumper to provide power through the USB to my Pi for klipper?

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There is not a lot of information about the internet about this talked baout on the internet. Must be not that common to use.

One github discussion about this is 5V power · Issue #87 · makerbase-mks/MKS-Robin-Nano-V1.X

I was also thinking this might be used to flash the board directly if it was plugged in the PC?

2

For flashing it’s ok. But it’s not recommended for printing use.

3

Typically, this jumper decides whether the board is powered via USB or via the 12V/24V input. For all printing operations and in a Klipper environment, it should be set to 12V/24V. It is usually not intended to provide power but to receive power.