I have just built a couple of machines and they are working well.
Added LCD controllers to them and used a computer connected by USB to control the printers.
I wanted to use the stand-alone feature of using the LCD controller and it worked fine, until I disconnected the USB from the computer.
The LCD powered down as if it was getting it's power from the USB connection.
I have built printers before and not had this problem, they have worked stand-alone without a computer connected.
Not sure why these two machines are dependent on the USB, maybe I have missed something?
Using Arduino Mega, RAMPS 1.4 and Reprapdiscount smart controller.
Added LCD controllers to them and used a computer connected by USB to control the printers.
I wanted to use the stand-alone feature of using the LCD controller and it worked fine, until I disconnected the USB from the computer.
The LCD powered down as if it was getting it's power from the USB connection.
I have built printers before and not had this problem, they have worked stand-alone without a computer connected.
Not sure why these two machines are dependent on the USB, maybe I have missed something?
Using Arduino Mega, RAMPS 1.4 and Reprapdiscount smart controller.