i am rewiring and checking things as I go along for my MP3DP. I am using a ramps 1.4 and arduino mega.
I am getting power from the power supply. i get 12.18V when i check the terminal.
the first thing i noticed was (with the ramps not attached to the arduino) is the red LED on the shield doesnt always go on and if it does it seems weak.
and when i put my probe on the ground on the terminal and check the voltage on the stepper driver, i get no voltage.
any idea what im doing wrong or what i can do to check? all i have hooked up is the PSU to the ramps board and the stepper drivers attached only. nothing else.