Can you leave USB plugged in safely?

Mostly Printed CNC - MPCNC Troubleshooting
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I have my machine setup on a raspberry pi right now, can I leave the USB cable connected when I turn off the 12V power supply? I’m concerned that the rambo board will only be partially powered.

I do this with my 3d printer and it’s fine :expressionless:

Thanks,

Charles.

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Hi Charles. I cannot say if it is save or not but for my 3d printer I just put a tiny bit of electrical tape over the contact in the USB plug so that it doesn’t deliver any power to the board. Works fine so far.

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Interesting solution, thanks for sharing!

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I do. I have a RaspberryPi plugged into my mainboard for remote control and the like. Whether the Pi is turned on depends on whether I need it, but it is always plugged in, and I’ve never had an issue.

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It should be fine. The usb doesn’t power the motors and on the rambos doesn’t even power the microcontroller or screen.

If it was a ramps, you might be concerned with drawing too much power through the USB, as it might mess with the pi. But I bet even that is fine.

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