The whining indicates you are using too much current already.
Some Ramps boards have bridges underneath the microstepping jumpers. They are set to 1/16 unless you cut the traces or be brave and burn them away by shortcutting the pins with a powerful powersupply. I burnt my traces with a small 3.7V LiPo battery.
Some Ramps boards have bridges underneath the microstepping jumpers. They are set to 1/16 unless you cut the traces or be brave and burn them away by shortcutting the pins with a powerful powersupply. I burnt my traces with a small 3.7V LiPo battery.