I'm trying to wire a Nema 17 stepper motor to a DRV-8825 driver by following this tutorial. I got to the part at around 7:15 where he adjusts the current with the potentiometer on the driver. This isn't working for me. No matter what I do, my meter reads ~10.8 VDC when I first measure, and over the course of around 15 seconds, it steadily drops to ~9.87 VDC.
Here is a picture what I've done.
Here is a link to the powe supply I'm using. 12V/2A.
I've confirmed that there is 12V acorss the VMot and Gnd pins, so it seems like the power supply is working right. I can't figure out why changing the potentiometer doesn't adjust the voltage.