Quote Originally Posted by sniffle View Post
There us a jumper i believe to supply the 5v from the power supply instead of usb. Gonna check that out.

And yes it uses the same connector as the ramps board i will double check them
Yeah, I see the jumper for power selection now on the RAMBO schematic. I had the prior understanding that RAMBO was pretty much an exact copy of the MEGA2560 + RAMPS + stepper drivers, but that's not true to the lower details I guess. I'd prefer the jumper - the automatic power select built into MEGA2560 board can be a pain when you want to shut the printer off while the printer is still connected to a computer.