The DRV8825 provides an integrated motor driver solution for printers, scanners, and other automated equipment applications. The device has two H-bridge drivers and a microstepping indexer, and is intended to drive a bipolar stepper motor. Radeon 1300 driver for mac.

Stepper Driver Current–Extremely Important– Adjust the potentiometers according to your stepper spec sheet (a good place to start is 0.7V or less). For the DRV8825 the voltage is set between the potentiometers and the power ground. Voltage at the pot =.9.(stepper current/2) the 90% is to cut down on the heat a bit.

This needs to be done while the drivers are energized. The easiest way I have found is to move all 3 axis 1mm in repetier host and leave it connected while you adjust the POTS.This gives a very technical walk through on driver current. FirmwareHave you flashed the marlin? Common IssueAdd an ExtruderIf you are Adding an extruder you need more power.