Stepper Motor Vibrating, Nothing Seems to Fix

Tried adding a 47uF and 220uF capacitor in the way this graphic from polulu shows (in parallel with the voltage source). Also used a variable power supply to output a constant 10V to the motor. While I could see the current spike whenever the motor tried to run (I saw peaks of ~1.45A), the motor didn't even vibrate this time around, there was just a small click every time it attempted to move. The click was too low pitch to be audible, but I could feel it happen (felt similar to the haptic feedback from an iphone). The click was less intense when I had the 47uF cap in the circuit vs the 220uF, but the current draw was the same for both.