I had a similar problem which was traced to the current setting on the DRV8825. If the current is too high the driver will shut down. Be aware that the pot needs to be turned clockwise to reduce current (at least on my DRV8825's).by med2004 - Reprappers
If we want to have round circles and accurate parts from the files it is necessary to control backlash. My way of taking up the backlash is using 2 nuts with a spring between them. The lead screws are also locked in the linear direction using 2 bearings and lock nut. The attachment is a section through my X axis block.by med2004 - Reprappers
I like what you did with your printer. I am new to the forum and also new to 3dprinters. I attached two pictures of my printer project. The 8mm lead screws are captured by a pair of ball bearings and drive my anti backlash nuts.by med2004 - Reprappers