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RepRapDiscount Full Graphic Smart Controller - Screen always on via USB

Posted by totalitarian 
RepRapDiscount Full Graphic Smart Controller - Screen always on via USB
October 02, 2017 10:06AM
Just installed a RepRapDiscount Full Graphic Smart Controller on my ramps 1.4 board. My issue is that the screen is always on when the board is powered via usb (RPi always connected) Is this normal?

On my old Melzi board there was a jumper to toggle between vref and usb. Vref only powered the lcd when the mains was connected and on.

Edited 1 time(s). Last edit at 10/02/2017 10:07AM by totalitarian.
Re: RepRapDiscount Full Graphic Smart Controller - Screen always on via USB
October 03, 2017 09:49AM
Yes its normall, USB 5volt will supply power to the arduino/ramps untill you supply 12olts from a power supply.
Re: RepRapDiscount Full Graphic Smart Controller - Screen always on via USB
October 04, 2017 02:43PM
Thanks, thought I had done something wrong.
Re: RepRapDiscount Full Graphic Smart Controller - Screen always on via USB
October 05, 2017 09:19AM
I modified my usb cord by cutting the 5v line on the usb end to make it so I could power off my Ramps/Mega combo via the printer switch....

in case you want to...
Re: RepRapDiscount Full Graphic Smart Controller - Screen always on via USB
October 09, 2017 12:59AM
I removed the power control mosfet on my Mega, data only USB cable wouldn't work for me.
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